2019 Paris Autumn International Scientific Meeting, November 15 th, 2019

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2019 Paris Autumn International Scientific Meeting, November 15 th, 2019

Ecole Normale Supérieur (ENS) de Paris
Salle L367, ENS-Paris, 24 Rue Lhomond, Paris

Inscripción para expositores: 
Presenters register link here

Inscripción para participantes: 
Participants register link here

Programme

13h45
Inauguración

14h00 (Moderador: François PIUZZI)
Rémy CHAPOULIE
Professeur de l’Université Bordeaux-Montaigne
Directeur du laboratoire IRAMAT-CRP2A (UMR 5060)
« Archéomtéraiux: plus de 20 ans de coopération scientifique du laboratoire IRAMAT-CRP2A (UMR 5060 CNRS – Univ. Bordeaux-Montaigne) avec des chercheurs du Pérou »

14h30
Luc CHASSAGNE
Professeur de la Université de Versailles/Université Paris Saclay
Directeur du laboratoire LISV – UVSQ
«Les applications possibles de la technologie Li-Fi»

José ORDONEZ
Chercheur CNRS, laboratorio Pprime, Universidad de Poitiers)
« Memoria Térmica en Base a un Memristor Térmico »

15h30
Vincent SALLET
Chercheur CNRS
Laboratorio GEMaC, Universidad de Versailles/Universidad Paris-Saclay:
«Croissance et applications des nanostructures ZnO»

16h00
Ekaterine CHIKOIDZE
IR CNRS
Lab. GEMaC, Université de Versailles SQY / Université Paris Saclay
«Challenge of electrical conductivity in Wide Band gap Oxides»

16:30h-16h50
Pause café

16h50
Juan LOREDO
Centre de Nanosciences et de Nanotechnologies (C2N), CNRS, Université Paris-Sud, Université Paris-Saclay,
“Quantum photonics: Generating non-classical light in photon-number superpositions”

17h05
Omar ORTIZ
Centre de Nanosciences et de Nanotechnologies (C2N), CNRS, Université Paris-Sud, Université Paris-Saclay
« Phonon engineering with superlattices »

17h20
Camilo VALENCIA ESTRADA and Jorge GARCIA-MARQUEZ
Research Engineers at Oledcomm SAS and LNE respectively
«Foundamentals on freeform surfaces’ optics design»

17h35
William DIEGO MAZA
Expert Orange
Orange, «Networks of the Future» (NoF) community)
«La tecnología 5G y sus desafíos»

17h50
Celina LUIZAR OBREGON
Universidad San Antonio de Abad del Cusco : UNSAAC – Perú
“XRF and FTIR analysis of the metallographic ink of a 16th-century document from the Historical Archive of Cusco”

18h05
Jhenry F. AGREDA DELGADO and Claver W. ALDAMA REYNA
Physics Department of National University of Trujillo-Peru
«Photoacoustic characterization of nanoparticles obtained by laser ablation in liquids»

18h20
Kevin CONTRERAS
Research Scientist – Optical Engineer
Thales SESO
Fundamentos del Sensado de Frentes de Onda y sus últimos avances y aplicaciones en la industria »

18h35
Modesto MONTOYA
Docente investigador de la Universidad Nacional de Ingeniería- PERU
«Simulación de experimentos sobre distribución de masa, energía y multiplicidad de neutrones inmediatos de la fisión espontánea del ²⁵²Cf y de la fissión inducida por neutrones térmicos del ²³³U, ²³⁵U y ²³⁹Pu»

18h50
Jorge LINARES
Professeur de la Université de Versailles/Université Paris Saclay
Laboratoire GEMaC, Universidad de Versailles/Universidad Paris-Saclay
«Estudio, par la simulation Monte Carlo, de la variación térmica del espectro de fonones en un compuesto de transición de espín »

19h00
Clausura

Resúmenes
Abtracts

La tecnología 5G y sus desafíos
Diego Maza
Orange
La nueva generación de redes móviles que comienza a ser desplegada en algunos países de mundo es llamada 5G. Esta nueva generación trae muchas promesas como grandes velocidades de datos, el soporte del internet de las cosas y el manejo de aplicaciones en tiempo real. Agregado a ello esta tecnología se ha convertido, más allá del aspecto tecnológico, en una herramienta clave para el desarrollo de la economía digital un país, a tal punto las grandes potencias mundiales han hecho de la 5G una prioridad nacional. En esta presentación ilustraremos de manera simple que es la 5G y de qué manera podría afectar nuestro cotidiano y sobre todo que impactos podría tener en la economía digital latinoamericana y mundial.

Vincent Sallet obtained his PhD in Physics from the University of Paris VII in 1994. After two years in the industry, working as an engineer for the development of silicon based sensors for aerospace applications, he joined the CNRS as permanent researcher in 1997 (Laboratoire de Physique des Solides et Cristallogénèse, LPSC, Meudon). He studied wide bandgap II-VI semiconductors for LEDs, grown by metalorganic chemical vapour deposition (MOCVD). From 2002 to 2006, he worked at the Laboratoire de Photonique et Nanostructures (LPN, Marcoussis) to investigate original diluted nitrides (III-V-N) grown by using molecular beam epitaxy technique (MBE) laser emission at 1,3 and 1.55 µm. Since 2006, he leads the activity on ZnO and related materials at GEMAC (CNRS-University of Versailles). The research activities are semiconductor nanowires growth, characterization, heterostructures, and nanostructures physics

Growth and applications of ZnO nanowires
Vincent Sallet
Laboratoire de Physique des Solides et Cristallogénèse, LPSC, Meudon
Semiconductor nanowires have already demonstrated enormous potential for future generations of electronic and optoelectronic nanodevices. For now more than a decade, silicon and III-V compounds (GaN, GaAs…) based nanostructured demonstrators have been realized and have shown to improve the performances of a variety of devices such as transistors, LEDs, sensors, solar cells, and have open the way to new types of nanogenerators based on piezoelectric nanowires (NWs). Semiconductor nanostructures made of II-VI materials are also attractive, in particular ZnO nanowires which can be easily grown using industrial and low-cost techniques. ZnO offers a tremendous combination of physical properties such as a wide direct bandgap, large exciton binding energy, piezoelectric properties, biocompatibility, surface reactivity… This talk will present the growth by using metalorganic chemical vapor deposition (MOCVD) of ZnO nanowires, and their potential applications for original devices.

Memoria Térmica de un Memristor Térmico
Jose Ordonez-Miranda
Institute Pprime in Futuroscope, CNRS, France
En base a la histéresis térmica de un material de cambio de fase sólida que intercambia calor por radiación con uno de fase invariante, proponemos un memristor térmico caracterizado por una curva de Lissajous entre el flujo de calor intercambiado y su diferencia de temperatura modulada periódicamente en el tiempo. Para un memristor con terminales de VO2 y un cuerpo negro, se muestra que: (i) las variaciones en temperatura de su memresistencia siguen un ciclo cerrado determinado por el ancho de histéresis térmica del VO2. (ii) La relación de activación/desactivación de la resistencia térmica esta determinada por el contraste de la emisividad del VO2 entre sus fases aislantes y metálicas, y es igual a 3.6. La analogía del memristor propuesto con su contraparte eléctrica sienta las bases de la computación térmica con fotones. »
Jose Ordonez-Miranda is a CNRS researcher at the Institute Pprime in Futuroscope, France. His research area is the transport of heat by phonons, photons, electrons, and polaritons propagating in nanomaterials with applications in thermotronics. The Boltzmann transport equation and Maxwell’s equations of electromagnetism are his main tools of theoretical modeling.
He obtained his bachelor degree in applied physics at the National University Jorge Basadre Grohmann in Tacna, Peru and received his Master in Physics from CINVESTAV in Merida, Mexico. Jose holds a Ph. D. degree in physics granted by CINVESTAV in collaboration with the University of Colorado in Boulder, USA. He performed a postdoc in the laboratory EM2C at the Ecole Centrale Paris, and was recruited by the CNRS in October 2015, for which he currently works as a full researcher (CRCN).
As a result of his research activities, since he began his Ph.D. studies in 2008, Jose has published 80 scientific papers and one book chapter. His Ph.D. thesis has been recognized by CINVESTAV and UNAM as the best doctoral thesis in sciences and materials sciences of Mexico in 2011, respectively. In addition, he was awarded the prize of outstanding young researcher granted by the International Photoacoustic and Photothermal Association (IPPA), in 2014, Shanghai, China..

Archéomatériaux : plus de 20 ans de coopération scientifique du laboratoire IRAMAT-CRP2A (UMR 5060 CNRS – Université Bordeaux Montaigne) avec des chercheurs du Pérou.
Rémy CHAPOUILIE
Université Bordeaux Montaigne
Les premières collaborations entre notre équipe et des archéologues du Pérou concernaient des problématiques chronologiques. Il s’agissait de dater par la méthode de Thermoluminescence (TL) des objets du site prestigieux découvert par Walter Alva, celui du seigneur de Sipan. Plus récemment la luminescence stimulée optiquement (OSL en anglais) a été utilisée pour d’autres problématiques ; elle contribue à mieux connaitre les peuplements de certains pays d’Amérique du sud tel que le Brésil où des datations aux alentours de 28 000 ans (BP) reculent les premiers moments d’occupation de ces territoires par des hominidés. Parallèlement depuis les années 2000, les rencontres régulières avec des archéologues péruviens comme Luis Jaime Castillo ou encore le très regretté Santiago Uceda, ont permis d’ouvrir le champ des recherches en sciences archéologiques. L’expertise du laboratoire de Bordeaux IRAMAT-CRP2A a été sollicitée pour notamment encadrer des travaux de jeunes chercheurs (français et péruviens) sur l’étude de céramiques anciennes, d’objets métalliques, ou encore de pigments pariétaux de temples. On citera en exemple une thèse de doctorat menée entre 2012 et 215 (sur financement IdEx de Bordeaux) qui s’intéressait aux technologies de production des objets et à la provenance de matériaux des céramiques Mochica tardives du nord du Pérou (site de San José de Moro, vallée de Lambayeque). Actuellement ce sont des céramiques de la civilisation Ischma (près du site de Pachacamac, avec la Professeure Luisa Diaz) qui sont en cours d’étude.
A travers de nombreux cas d’études Rémy Chapoulie tentera de montrer que les méthodes, méthodologies et techniques d’un laboratoire d’archéométrie, peuvent grandement contribuer à répondre à certaines problématiques archéologiques d’un pays tel que le Pérou où le patrimoine culturel constitue un enjeu national et international.

Archaeomaterials: more than 20 years of scientific cooperation of the laboratory IRAMAT-CRP2A (UMR 5060 CNRS – University Bordeaux Montaigne) with researchers from Peru.
Rémy CHAPOUILIE
Université Bordeaux Montaigne
The first collaborations between our team and archaeologists from Peru concerned chronological issues. It was to date by Thermoluminescence (TL), objects of the prestigious site discovered by Walter Alva, that of the lord of Sipan. More recently Optically Stimulated Luminescence (OSL) has been used for other problems. It helps to better know the populations of certain South American countries such as Brazil, where dates dating back to around 28,000 years (BP) are reminiscent of the first moments of occupation of these territories by hominids. At the same time since the 2000s, regular meetings with Peruvian archaeologists such as Luis Jaime Castillo or the much missed Santiago Uceda, have opened the field of archaeological research. The expertise of Bordeaux laboratory IRAMAT-CRP2A has been requested to particularly supervise the work of young researchers (French and Peruvian) on the study of ancient ceramics, metallic objects, or wall pigments of temples. An example is a doctoral thesis carried out between 2012 and 215 (on IdEx funding from Bordeaux) which focused on the production technologies of objects and the provenance of late Mochica ceramic material from northern Peru (San José de Moro, Lambayeque valley). Currently ceramic from the Ischma civilization (near the site of Pachacamac, with Professor Luisa Diaz) are being studi
Through many case studies Remy Chapoulie will try to show that the methods, methodologies and techniques of an archeometry laboratory, can greatly contribute to answer some archaeological problems of a country such as Peru where the cultural heritage constitutes a national and international challenge
CV
Rémy Chapoulie graduated in Applied Physics from the University of Bordeaux 1 (Science and Technology). He obtained his doctorate in 1988 at the University of Bordeaux Montaigne (human and social sciences) and his habilitation at the University of Bordeaux in 2004 in science and technology. He is now a professor of physics in archeometry.
Its main research activities currently focus on the multiphysical study and archeometry of ceramics and pigments of pre-Columbian Peru, the taphonomy of the prehistoric cave walls decorated in Dordogne (France), as well as the archeometric study of different ancient materials: antique marble, Roman amphorae, lithic materials, Japanese prints, French earthenware. One of his scientific interests is the development of mobile analytical systems for in situ measurements.
Its scientific and administrative responsibilities are closely related to the sciences devoted to the study of cultural heritage. He is director of the CRP2A laboratory of UMR 5060 IRAMAT CNRS-Univ Bordeaux Montaigne (Research Institute on Archaeomaterials). He is a member of the board of the LabEx «Laboratory of Archaeological Sciences of Bordeaux». This cluster brings together three teams of Bordeaux researchers with expertise in archeology, archeometry, history, physical anthropology and prehistory. Rémy Chapoulie is also director of the Archeovision laboratory (UMS 3657 CNRS-UBM-UB), involved in 3D technologies: digitization and topography, modeling and restitution, promotion and archiving of data.
CV
Rémy Chapoulie est diplômé en physique appliquée de l’université de Bordeaux 1 (Sciences et Technologie). Il a obtenu son doctorat en 1988 à l’université de Bordeaux Montaigne (sciences humaines et sociales) et son habilitation à l’université de Bordeaux en 2004 en sciences et technologies. Il est maintenant professeur titulaire de physique en archéométrie.
Ses principales activités de recherche portent actuellement sur l’étude multiphysique et l’archéométrie de la céramique et des pigments du Pérou précolombien, la taphonomie des parois de grottes préhistoriques décorées en Dordogne (France), ainsi que l’étude archéométrique de différents matériaux anciens : marbre antique, amphores romaines, matériaux lithiques, estampes japonaises, faïence française. L’un de ses intérêts scientifiques porte sur le développement de systèmes analytiques mobiles pour les mesures in situ.
Ses responsabilités scientifiques et administratives sont très étroitement liées aux sciences consacrées à l’étude du patrimoine culturel. Il est directeur du laboratoire CRP2A de l’UMR 5060 IRAMAT CNRS-Univ Bordeaux Montaigne (Institut de recherche sur les archéomatériaux). Il est membre du directoire du LabEx « Laboratoire des Sciences Archéologiques de Bordeaux ». Ce pôle regroupe trois équipes de chercheurs bordelais aux compétences en archéologie, archéométrie, histoire, anthropologie physique et préhistoire. Rémy Chapoulie est également directeur du laboratoire Archeovision (UMS 3657 CNRS-UBM-UB), impliqué dans les technologies 3D : numérisation et topographie, modélisation et restitution, promotion et archivage des données.

Visible Light Communication and LiFi: principles and applications
Luc CHASSAGNE
Université de Versailles St Quentin en Yvelines / Paris Saclay
Visible Light Communications appeared few years ago with the LED growing market. The LED can be modulated at high frequency as laser in optical communications. It can then ensures very high bandwidth so then very high data rate with commecial lights. The used modulations are quite inspired from wireless and optics communications. This new technology can be complementary from WiFi or others radiofrequency technologies but has some advantages: peer-to-peer links (broadcast for RF), intrinsic security, no electromagnetic distrurbances, and so on. A lot of applications has been identified in future town that should be highly connected.
CV
L. Chassagne is graduated from Engineer degree of Supelec (France) in 1994 and received his Ph.D. in optoelectronics from the University of Paris XI, Orsay, France in 2000 for his work in the field of atomic frequency standard metrology. He is now Professor and Director of the LISV laboratory. The topics of interest in his research are nanometrology, precision displacements, sensors and AFM instrumentation

Correlation between mass yield and the oversize of measured average prompt neutron multiplicity as a function of the mass of fragments from low energy fission of actinides
M. Montoya
Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Rímac, Lima, Peru;
E-mail: mmontoya@uni.edu.pe
Abstract
There are several different results, obtained by the experimental double energy method, on the average prompt neutron multiplicity (ν) as a function of the masses calculated from the measured kinetic energies  of the complementary final fragments from the reactions ²³³U(n_th, f), ²³⁵U(n_th, f) and ²⁵²Cf(sf) [1–9] and ²³⁹Pu(n_th, f), respectively. A Monte Carlo simulation is performed to reproduce the curve average prompt neutron multiplicity for each of these reactions [14,15]. The input data (based on experimental results) consist of a yield of mass, a Gaussian distribution of kinetic energy (TKE), a sawtooth approach of the prompt neutron multiplicity, and a parameter α defined as the inverse slope of ν(TKE), as a function of the masses of complementary primary fragments. It is shown that the oversize of ν relative to the sawtooth approach in the region of light fragment mass near the symmetric fission is due to the interplay of the prompt neutron emission and the slope of the mass yield curve. The magnitude of the oversize of ν relative to the sawtooth approach is strongly dependent on α.
Keywords: low energy fission, thermal neutron-induced fission, prompt neutron multiplicity, fragment distribution, 233U, 235U, 23Pu, 252Cf.
CV
Docteur d’État Universidad París XI, Orsay, Francia (1981)
https://orcid.org/0000-0002-3376-1872

Fundamentals on Freeform optics
Jorge GARCIA-MARQUEZ and Juan Camilo VALENCIA-ESTRADA
Université de Versailles
In lens design, we use a set of general rules and laws that permits us to calculate the essential points of the optical system such as distances, thickness, pupils, and focal distance among others to calculate the lens’ surfaces that allow us to obtain an image from a given object. The classical lens’ design theory changes radically as our theoretical foundations do not rely on ray tracing rules. We show that with the rules expressed in a reduced vector analytical solution set of equations, we can design all optical elements, i.e., refractive, reflective, catadioptric. These foundations permit to keep under control the system aberration budget on every surface, reducing computation time dramatically.
CV
Jorge GARCIA-MARQUEZ is an electronics engineer (1994) by Universidad Iberoamericana at León (Mexico). He holds an M. Sc. (1995) and a Ph. D. Optical Sciences (1998) by Universidad de Guanajuato (Mexico). He obtained his Habilitation à Diriger des Recherches diploma in Electrical, Electronics and Photonics Engineering by Université de Versailles, France (2013). From 1999 to 2001, he was a research engineer at Institut National de Métrologie in Paris, where he developed instruments to measure the spectral width of frequency-stabilized lasers. From 2001 to 2012, he was a full researcher and lecturer at Centro de Investigaciones en Optica (CIO) in León, Mexico. At CIO, he worked on phase recovery techniques, interferometry, optical design, and superresolution. In 2012, he moved to France, where he worked first as a research engineer for Université de Versailles, then for the Laboratoire Commun de Métrologie LNE/CNAM where he contributed in developing a high-resolution, high-range telemeter. In January 2015, he became a senior engineer for the High-Tech Company Oledcomm SAS in topics related to visible light communications (VLC or LiFi), acting as Head of European Research and Innovation Projects. He is now with Laboratoire National de Métrologie et d’Essais as a researcher. He has published more than 60 research and congress articles and has filed 13 patents.
Juan Camilo VALENCIA-ESTRADA is a senior researcher in visible light communications since 2015 at Oledcomm since 2016. He received his BS in Industrial engineering (Colombia ‘87) and MS in applied mathematics (Colombia ‘10) at Universidad EAFIT, and D.Sc. in Optics by Centro de Investigaciones en Optica (Mexico ‘15). Since 1987, he was a mechanical engineer and specialist in machines’ design, injection moulds design, CNC manufacturing and optical fabrication. After his doctoral studies he immigrate to France where he became a postdoctoral fellow at Laboratoire d’Ingénierie des Systèmes de l’université de Versailles. Senior researcher in visible light communications. His current and past research cover Optical links and antennae and visible light communications, optical super-resolution, optical lens design, mechanical design of CNC diamond turning lathes and injection moulds. He is optical designer, optical propagation and optical manufacturing specialist at High-Tech Oledcomm SAS. He has published 15 peer-reviewed articles and has filed 7 patents.

Photoacoustic characterization of nanoparticles obtained by laser ablation in liquids
Jhenry F. Agreda Delgado and laver W. Aldama Reyna
National University of Trujillo-Peru.
Gold, silver and copper nanoparticles were produced by laser ablation in bidistilled water, ethanol and oils. A Nd:YAG laser operating at 1064 nm, 20.4 mJ of pulse energy,6 ns of pulse duration and 10 Hz of repetition rate was used to realize the synthesis. After the synthesis, changes in optical properties of colloid were studied. To realize the study, the pulsed photoacoustic technique was used. Additionally, UV-Vis spectroscopy, dynamic light scattering and Z potential techniques were used to correlate results. After the synthesis, photoacoustic signals, absorption spectra, and size distributions were obtained at different times. Each absorption spectrum showed a unique peak attributed to spherical silver nanoparticles. It was demonstrated that the root mean square and correlation analysis of photoacoustic signals permit to study changes in optical properties of colloidal nanoparticles.
Keywords: Pulsed photoacoustic technique, correlation analysis, laser ablation in liquids.
CV
Jhenry F. Agreda Delgado
Master in Physical Sciences by the National University of Trujillo and member of the Research Group of the Laboratory of Optics and Lasers of the National University of Trujillo-Peru.
Claver W. Aldama Reyna
Doctor in Physics by the National University of Trujillo. Principal Professor of the Academic Department of Physics, Head of the Laboratory of Optics and Lasers and Director of the Professional School of Physics of the National University of Trujillo-Peru.

XRF and FTIR analysis of the metallographic ink of a 16th-century document from the Historical Archive of Cusco
Celina Luizar Obregon*, Marco A. Zamalloa Jara, Janet F. Gonzales Bellido, Yuri J. Chura Huyaillani, Flor Rojas Arizapana, Jorge Olivera Olivera.
National University of San Antonio Abad del Cusco (UNSAAC)
The aim of this work is the study of the elemental composition of writing inks used in a 16th-century manuscript stored in the Historical Archive of Cusco – Peru (HAC). The document describes events experienced by city residents during an expedition for the discovery of the Paititi or City of Gold. The 14 pages were analyzed in situ using an adequately calibrated portable Olympus Delta Premium X-ray fluorescence spectrometer in soil mode. We analyzed 56 points corresponding to black ink and paper without ink. The concentration results (ppm) indicate that there are two kinds of inks and that both contain Fe, Cu, Zn, Pb, among other elements. The principal component analysis (PCA) highlights that the first writing ink would be used on page 1 and 2, while the second ink would have been used to write the header, the end of page 2, all signatures which are on different sheets, and the remainder of the manuscript. This analysis of materials suggests that, in Cusco of that period, few people can possess, handled, and use the writing inks.
CV
Celina Luízar Obregón
Graduated in Chemistry from the National University of San Antonio Abad del Cusco (UNSAAC). She obtained her doctorate in science (2002) at the Universidade Estadual de Campinas (UNICAMP), Brazil. Since 2005 she is a professor in Chemistry Department of UNSAAC in Cusco – Peru.
The current research area involves the use of spectroscopic methods for the analysis of cultural heritage materials of inorganic and organic origin. In this area she has recently conducted studies of textiles, ceramics, manuscripts, food and other materials originating in Peru using UV-VIS, FTIR, XRF and LIBS. She has been the coordinator of the Organic Chemistry Laboratory and she is currently also a member of the Non-Destructive Optical Spectroscopy Laboratory of the Faculty of Sciences, which allows her to do interdisciplinary work.

Thermal variation of the phonon spectra in a spin crossover compound: a MonteCarlo investigation
J. Linares, M. Ndiaye, J. Nasser, K. Boukheddaden
Universités (CE2) à l’Université de Versailles UVSQ / Université Paris Saclay
This contribution concerns the iron (II) 3d6 spin crossover compounds that changes from a diamagnetic (LS) to paramagnetic (HS) spin states. In the « Atom phonon coupling » model the spin crossover molescules are modeled as atoms with two electronic states LS and HS and it is assumed that the elastic constant of the spring depends on the electronic stage of the two near-neighbor coupled molecules. Using Monte Carlo Metropolis technique we reproduce the thermal variation of the high-spin fraction as well as the thermal variation of the phonon spectra.
CV
Jorge LINARES
Professeur des Universités (CE2) à l’Université de Versailles UVSQ / Université Paris Saclay
(Professeur Emérite)
Laboratoire GEMAC (UMR CNRS-UVSQ), UVSQ/Paris-Saclay
Jorge LINARES, from Chepen (Peru), Professor of Physics at the University of Versailles (UVSQ)/University Paris – Saclay and co-Director of Master MATEC-PVE (University Paris-Saclay), “Palmes Académiques” and “Médaille du Sénat” en France, member of the “Academia Nacional de Ciencias del Perú. He was previously Assistant Professor at the University Pierre et Marie Curie (Paris VI) and Professor at the Pontificia Universidad Católica del Perú.He obtained his doctorat in physics at the University of Grenoble and his “Habilitation HdR” at the Univesity Pierre et Marie Curie (Paris VI). He has more than 160 scientific papers (h-index 38). He has been, for 8 years, member of the Conseil National Universitaire-France, Director of the Physics Departement at the UVSQ university. His research interests include phase transition of spin crossover materials (theory and applications), Monte Carlo Simulation using entropic sampling algorithm, mixed valence and physics of nanomaterials.

Phonon engineering with superlattices
Omar ORTIZ
Pontificia Universidad Católica del Perú.
Nanophononics appears as an advantageous platform for the study of complex wave dynamics. The slow propagation of phonons and long coherent length at small wavelengths (~10nm) contrast with the usual values for optical systems. These features allow us to optically probe wave dynamics on timescales well bellow the mechanical oscillation period.
In this work, we design one-dimensional acoustic resonators based on GaAs/AlAs multilayers, able to confine acoustic phonons in the hundreds of GHz range. We engineer the phononic band structures associated with periodic superlattices implementing artificial phononic potentials. Most earlier implementations are based on the engineering of the phononic bands arising from coupled nanoacoustic resonators1. Here, we generalize the concept of adiabatic tuning of periodic multilayers for the implementation of effective one-dimensional potentials2. The design method has been applied for the cases of parabolic, Morse and double-well potentials3. This kind of structures can be realized by molecular beam epitaxy (MBE) growth and experimentally studied by pump-probe coherent phonon generation and Brillouin scattering techniques. We set up a time-resolved pump-probe experiment to study the phonon dynamics in these structures at a picosecond time scale.
CV
Omar Ortiz obtained his Bachellor and Master degree in Physics from the Pontificia Universidad Católica del Perú. There, he was part of the Quantum Optics Group and contributed to the implementation of the laboratory working with single photon experiments. During his Master studies, he joined the private sector working as a research programmer for Wolfram Research during six years. After this, Omar returned to the academy to pursue doctoral studies in Physics. Moving to Paris, France he joined the group of Daniel Lanzillotti Kimura in the Centre for Nanoscience and Nanotechnology. His work is now focused in nanophononics, studying the control of vibrations at the nanoscale. Currently, he is a third year doctoral student with wide research interests going from fundamental research and computer sciences towards nanoscience and its applications to quantum technologies.
[1] Lanzillotti-Kimura, N. D., et al., Physical Review B 75, 024301 (2007)
[2] Lamberti, F. R., et al., Applied Physics Letters 111, 173107 (2017)
[3] Ortíz, O., et al., Physical Review B 100, 085430 (2019)

Challenge of electrical conductivity in Wide Band gap Oxides
Ekaterine Chikoidze
Lab. GEMaC, Université de Versailles SQY / Université Paris Saclay
Oxides represent the largest family of wide bandgap (WBG) semiconductors and also offer a huge potential range of complementary magnetic and electronic properties, such as ferromagnetism, ferroelectricity, antiferroelectricity and high-temperature superconductivity. While there are several n-type transparent semiconductor oxides (TSO) for optoelectronic applications their required p-type counterparts oxides are known to be more challenging. The experimental difficulties and our achievements for demonstration of p type conductivity in some oxides will be discussed.
CV
Graduated and PhD degree fromFaculty of physics, Material Science Department at Tbilisi State University, Georgia
Having 20 years of experience of working in the field of physical properties of Wide band gap materials (ZnS, Diamond, ZnO, 3d magnetic oxides, Cu based transparent conducting oxides, Ga2O3). Author of 67 publications, 91 participations in Conferences, 10 invited talks. Organizer of several workshops and member of scientific committees. Being in charge of transport properties in GEMaC she developed several home made experimental instrumentation dedicated to study higly resistive thin films: Seebeck Effect, Photoconductivity; Another important development, unic in Europe is upgraded PPMS(Quantum design) set up, giving possibility to measure extremely high (up to 100GOhm) resistance materials in very broad range of temperature and magnetic field. Expertise of Dr.Chikoidze involves her in collaborations with researchers from 12 countries. Responsible for several bilateral international projects. Languages :Georgian , English , Italian, Russian , French . Experience working in news papers and Radio.
ID ORCID : orcid.org/0000-0002-6566-4639
Research Gate: https://www.researchgate.net/profile/E_Chikoidze

Organizan

Red Internacional de Ciencia y Tecnología Universidad de Versalles, FranciaAsociación franco-peruana “Puya de Raymondi” Asepef AlumniAsociación de Científicos Peruanos de Francia Federación Internacional de Sociedades Científicas Academia Nuclear del Perú Centro de Preparación para la Ciencia y Tecnología

Auspician

www.encuentrocientificointernacional.org

Objetivos: Conocer los temas y los avances de investigación de investigadores internacionales en temas relacionados con el desarrollo científico y tecnológía del Perú. Promover la participación de investigadores internacionales en proyectos de investigación en colaboración con instituciones peruanas. Promover la participación de investigadores peruanos en proyectos internacionales sobre temas peruanos Purpose Encourage researchers around the world to study topics related to Peru. To identify areas of global research that could be of interest to peruvian researchers working in Peru. Promote scientific collaboration between peruvian institutions and international institutions.