Group Members

postdoc

Short Bio: Mushegh Rafayelyan obtained his bachelor's and master's degrees at Yerevan State University (Armenia) in 2010 and 2012 respectively. In 2015 he obtained a PhD in Theoretical Physics from the same university (Thesis: "Optical properties of anisotropic metamaterials and metamaterial based cholesteric liquid crystals"). In 2017 he obtained a PhD in Lasers, Materials and Nanoscience from University of Bordeaux (France) (Thesis: "Singular beam shaping from spin-orbit flat optics", supervised by Etienne Brasselet). Since 2018 he is a postdoctoral researcher in Laboratoire Kastler-Brossel, at Ecole Normale Supérieure (ENS, Paris), in the group of Sylvain Gigan, working on optical computing. In general, his research interests focus on beam shaping, optical imaging, optical computing and machine learning, light-matter interactions, liquid crystal topological defects, singular optics, and nonlinear optics. List of Publications : [1]  M. Rafayelyan and E. Brasselet, “Spin-to-orbital angular momentum mapping of polychromatic light,” Physical review letters 120, 213903 (2018). [2]  M. Rafayelyan, G. Agez, and E. Brasselet, “Ultrabroadband gradient-pitch bragg-berry mirrors,” Physical Review A 96, 043862 (2017). [3]  M. Rafayelyan, “Singular beam shaping from spin-orbit flat optics,” Ph.D. thesis, Bordeaux (2017). [4]  M. Rafayelyan and E. Brasselet, “Laguerre–gaussian modal q-plates,” Optics letters 42, 1966–1969 (2017). [5]  G. Tkachenko, M. Rafayelyan, and E. Brasselet, “Spin-orbit optomechanics of optically levitated chiral bragg microspheres,”Physical Review A 95, 053839 (2017). [6]  A. Gevorgyan, M. Harutyunyan, K. Oganesyan, E. Ayryan, M. Hnatic, M. Rafayelyan, Y. V. Rostovtsev, and G. Kurizki,“Polarization properties of the cholesteric liquid crystals,” arXiv preprint arXiv:1704.03259 (2017). [7]  M. Rafayelyan and E. Brasselet, “Bragg-berry mirrors: reflective broadband q-plates,” Optics Letters 41, 3972–3975(2016).[8]  M. Rafayelyan, G. Tkachenko, and E. Brasselet, “Reflective spin-orbit geometric phase from chiral anisotropic optical media,” Physical review letters 116, 253902 (2016). [9]  H. Grigorian, A. Ayriyan, E. Chubarian, A. Piloyan, and M. Rafayelyan, “An algorithm for the simulation of the magnetized neutron star cooling,” EPJ Web of Conferences 108, 02025 (2016). [10]  M. Rafayelyan, “Light propagation in metamaterial based anisotropic layer,” Proceedings of the YSU, Physics Mathematics pp. 61–66 (2015). [11]  M. Rafayelyan and A. Gevorgyan, “Electromagnetic wave non-reciprocity in a homogeneous anisotropic uniaxial medium,”Modern Problems in Optics and Photonics Proceedings of the International Advanced Research Workshop 27, 44–47 (2010). [12]  A. H. Gevorgyan, R. B. Alaverdyan, H. Gharagulyan, M. S. Rafayelyan, and H. Grigoryan, “Diffusion in liquid crystals of two cholesterics with different pitches,” Journal of Nanophotonics 9, 093591 (2015). [13]  A. Gevorgyan and M. Rafayelyan, “Light propagation in anisotropic metamaterials. ii. reflection from the half-space,”Journal of Contemporary Physics (Armenian Academy of Sciences) 49, 12–19 (2014). [14]  H. Gharagulyan, H. Grigoryan, M. Rafayelyan, A. Gevorgyan, and R. Alaverdyan, “Reflection and transmission properties of light in chiral liquid-crystalline photonic structures with pitch gradient and the phenomenon of nonreciprocity,” Proceedings of the International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS-2013) pp. 115–120 (2013). [15]  H. Grigoryan, H. Gharagulyan, M. Rafayelyan, A. Gevorgyan, and R. Alaverdyan, “Theoretical and experimental investi- gation of polarization and spectral properties of light in multilayer cholesteric liquid-crystalline systems,” Proceedings of the International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS-2013) pp. 111–114 (2013). [16]  A. Gevorgyan and M. Rafayelyan, “Light propagation in anisotropic metamaterials. i. dispersion surfaces,” Journal of Contemporary Physics (Armenian Academy of Sciences) 48, 276–284 (2013). [17]  A. Gevorgyan and M. Rafayelyan, “Optics of anisotropic metamaterial based structurally chiral photonic crystals,” Journal of Optics 15, 125103 (2013). [18]  A. Gevorgyan, K. Oganesyan, R. Karapetyan, and M. Rafayelyan, “The photonic density of states and the light energy density in cholesteric liquid crystal cells,” Laser Physics Letters 10, 125802 (2013). [19]  M. Rafayelyan and A. Gevorgyan, “Optics of cholesteric liquid crystals with large both dielectric and magnetic anisotropies,” Molecular Crystals and Liquid Crystals 561, 185–193 (2012). [20]  A. Gevorgyan, M. Harutyunyan, K. Oganesyan, and M. Rafayelyan, “Cholesteric liquid crystals with tunable defect inside as polarization azimuth rotation amplifiers and polarization azimuth stabilizers,” Optik-International Journal for Light and Electron Optics 123, 2076–2081 (2012). [21]  M. Rafayelyan and A. Gevorgyan, “Dispersion surfaces and light propagation in homogeneous dielectric-magnetic uniaxial medium,” Journal of Physics: Conference Series 350, 012031 (2012). [22]  M. Rafayelyan and A. Gevorgyan, “Plane electromagnetic waves in a homogeneous anisotropic uniaxial medium having a double anisotropy and an arbitrary orientation of its optical axis,” International Conference on Laser Physics 2010 7998, 79980K (2011).