Speaker：Dr. Jian-Wen DONG, School of Physics, Sun Yat-sen University (SYSU)
Invited by：Prof. Huang Zhenli
Time：10:00-11:30, September 18, 2018
Venue: A101
Abstract:
Nanophotonic devices in silicon-on-insulator (SOI) platform can potentially improve the capabilities of modern information-processing systems by replacing some of their electrical counterparts. The discovery of topological photonics provides a new degree of freedom to control the flow of light, enabling novel optoelectronic functionalities and devices. However, the subwavelength strategy in SOI platform remains challenge. Valley photonic crystals (VPCs) pave an alternative way to achieve SOI topological nanophotonic devices with high performance. We have proposed all-dielectric VPCs with nonzero valley Chern number by employing spin-valley coupling, and achieved at microwave and telecommunication regions. Measurement results show flat-top high-transmittance spectra, verifying broadband back-scattering immune propagation. These works show a prototype of on-chip photonic devices, with promising applications for integrate photonics, and photonic analog of quantum information processing based on topological nanophotonic modes.
Biography：
Dr. Jian-Wen DONG, Professor in School of Physics, Sun Yat-sen University (SYSU), Cheung Kong Scholar Youth Professor, NSFC Outstanding Youth Scientist. He was a visiting scholar in University of California, Berkeley (UCB) and Hong Kong University of Science and Technology (HKUST). His current research areas are nanophotonics, topological/valley photonics, metasurface and holography. He was interested in backscattering-immune propagation in time-reversal invariant system. He has systematically studied and known-how on the connections among topological photonics, metamaterial fabrication, and micro-nano devices. He has published over 60 research papers in scientific journals including Nat. Mater., Nat. Commun., Phys. Rev. Lett., Adv. Mater., etc. He has two ESI papers, one of which was selected as the "top ten progress of Chinese optics in 2017 - basic research”.
