Negative refraction mediated by bound states in the continuum  

作　　者：ZHANYUAN ZHANG FEIFEI QIN YI XU SONGNIAN FU YUNCAI WANG YUWEN QIN 

机构地区：[1]Department of Electronic Engineering,College of Information Science and Technology,Jinan University,Guangzhou 510632,China [2]Advanced Institute of Photonics Technology,School of Information Engineering,and Guangdong Provincial Key Laboratory of Information Photonics Technology,Guangdong University of Technology,Guangzhou 510006,China

出　　处：《Photonics Research》2021年第8期1592-1597,共6页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2018YFB1801001);National Natural Science Foundation of China(91750110);Guangdong Introducing Innovative and Entrepreneurial Teams of the Pearl River Talent Recruitment Program(2019ZT08X340);Research and Development Plan in Key Areas of Guangdong Province(2018B010114002);Pearl River Nova Program of Guangzhou(201806010040)。

摘　　要：Negative refraction might occur at the interface between a two-dimensional photonic crystal(Ph C)slab and a homogeneous medium,where the guiding of the electromagnetic wave along the third dimension is governed by total internal reflection.Herein,we report on the observation of negative refraction in the Ph C slab where the vertical guiding is enabled by a bound state in the continuum and essentially beyond the light cone.Such abnormal refraction and guiding mechanism are based on the synchronous crafting of spatial dispersion and the radiative lifetime of Bloch modes within the radiative continuum.Microwave experiments are provided to further validate the numerical proposal in an all-dielectric Ph C platform.It is envisioned that the negative refraction observed beyond the light cone might facilitate the development of optical devices in integrated optics,such as couplers,multiplexers,and demultiplexers.

关 键 词：REFRACTION CONTINUUM RADIATIVE 

分 类 号：TN25[电子电信—物理电子学]