High quality factor unidirectional guided resonances of a silicon-on-lithium niobate photonic crystal slab for a tunable Gires-Tournois interferometer

被引：4

作者：

Xu, Wei ^{[1
,2
,3
]}

Hong, Qilin ^{[1
,2
]}

Liu, Ping ^{[1
,2
,3
]}

Peng, Jialong ^{[1
,2
,3
]}

Yang, Biao ^{[1
,2
,3
]}

Zhang, Jianfa ^{[1
,2
,3
]}

Zhu, Zhihong ^{[1
,2
,3
]}

机构：

[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China

[2] Natl Univ Def Technol, Hunan Prov Key Lab Novel Nanooptoelect Informat Ma, Changsha 410073, Peoples R China

[3] Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China

来源：

OPTICS LETTERS | 2023年 / 48卷 / 18期

基金：

中国国家自然科学基金;

关键词：

PHASE; DISPERSION; RADIATION;

D O I：

10.1364/OL.498936

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High quality (Q) factor, tunable unidirectional guided resonances (UGRs) based on a silicon-on-lithium niobate (Si-on-LN) photonic crystal (PhC) slab are proposed and numerically investigated. The Q factors of UGRs decay quadratically with respect to the distance from the Gamma point to the wave vector along the Gamma-X direction, and high Q factor UGRs are obtained by moving UGR close to the Gamma point. Also, a Gires-Tournois interferometer (GTI) based on a UGR with a Q factor of 9465 is numerically demonstrated, which produces a maximum group delay of 30 ps around 1.55 mu m with unitary reflectance. The group delay and operation wavelengths of the GTI can be adjusted effectively by tuning the refractive index of lithium niobate (LN) and the periods of the silicon bars. Our study may find applications in PhC surface-emitting lasers, dispersion compensation, and compression of light pulses. (c) 2023 Optica Publishing Group

引用

页码：4761 / 4764

页数：4