Critical coupling vortex with grating-induced high Q-factor optical Tamm states

被引：21
作者：
Bikbaev, Rashid G. [1 ,2 ]
Maksimov, Dmitrii N. [1 ,2 ]
Pankin, Pavel S. [1 ,2 ]
Chen, Kuo-Ping [3 ]
Timofeev, Ivan, V [1 ,2 ]
机构：
[1] Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[2] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[3] Natl Chiao Tung Univ, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan
来源：
OPTICS EXPRESS | 2021年 / 29卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
BOUND-STATES; FANO RESONANCE; SURFACE-STATES; ARRAY; CONTINUUM; MODES; LIGHT;
D O I：
10.1364/OE.416132
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate optical Tamm states supported by a dielectric grating placed on top of a distributed Bragg reflector. It is found that under certain conditions the Tamm state may become a bound state in the continuum. The bound state, in its turn, induces the effect of critical coupling with the reflectance amplitude reaching an exact zero. We demonstrate that the critical coupling point is located in the core of a vortex of the reflection amplitude gradient in the space of the wavelength and angle of incidence. The emergence of the vortex is explained by the coupled mode theory. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：4672 / 4680
页数：9
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