Synthetic Weyl point and interleaved Dirac points in multi-component plasmonic-dielectric crystals

报告题目:Synthetic Weyl point and interleaved Dirac points in multi-component plasmonic-dielectric crystals

报告人:肖君军教授   哈尔滨工业大学(深圳)电子与信息工程学院

报告时间:2019 年9月10日下午14:00

报告地点: 物理科技楼405


报告摘要Based on the one-dimensional Su-Schrieffer-Heeger (SSH) model, the opposite sign of the inter-coupling and the intra-coupling coefficients predicts the existence of Dirac point (DP) at the Brillouin zone (BZ) center. We show that multi-component alternating plasmonic-dielectric waveguide array serves as a promising platform to realize synthetic DPs which appear alternatively at the BZ center and edge. Particularly, the hybrid surface plasmon polariton (SPP) band supported in the plasmonic slab with odd parity, interacts with the first-order photonic bands supported in the dielectric slab, resulting in two hybrid bands which give rise to an accidental crossing at the BZ center. Besides, an additional DP arises at the BZ edge. As such, different band surfaces in the considered frequency are fully connected with interleaved DPs, alternatively appearing at the BZ center and edge. The fully spanned topological interface states are localized at the interface between the multi-component plasmonic-dielectric waveguide array and a homogenous medium (either plasmonic or dielectric medium). By broken the inversionsymmetry, we show thatit is possible to have synthetic Weyl points whichprovides an efficient way to engineering the topologicalinterface state.

报告人简介:肖君军,哈尔滨工业大学(深圳)电子与信息工程学院教授、博士生导师,香港中文大学博士(2006),深圳空天探测成像技术工程实验室主任,深圳物联网终端关键技术重点实验室副主任。主要研究领域为微纳光子学和智能光信息处理。曾先后任职于香港中文大学物理系、香港科技大学蒙明伟纳米科技研究所、多伦多大学光学研究中心、哈尔滨工业大学深圳研究生院。长期专注于微纳光子学基础前沿课题,新型光电子器件的智能设计,以及高分辨光学成像与精密光学检测技术的研究。已在Phys. Rev. Lett., Phys. Rev. B(A), IEEE Trans., Appl. Phys. Lett., Opt. Lett., Opt. Express, ACS Photonics等刊物上发表研究论文100余篇,国内外学术会议邀请报告10余次,参编英文专著2部,申请及获得国家发明专利16项,主持和完成国家及省市科研项目近20项。