Abstract
Optical cavities supporting the optical bound states in the continuum (BICs) with infinite radiative lifetime have recently been widely reported. Here, we theoretically investigate BICs in an ultrathin photonic structure consisting of a multilayer, nanostructured transition metal dichalcogenide (TMD). Using finite element simulations, we demonstrate two distinct groups of BICs, namely symmetry-protected BICs and interference-based BICs, in the photonic system. Under normal incidence, their dispersion can be mediated by altering the grating pitch, which makes it possible to explore the strong coupling of these two photonic modes with the TMD exciton band in the same structure. This work expands not only the library of traditional nanophotonic approaches, but also provides more possibilities for optoelectronic devices toward miniaturization.
© 2021 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Qing Zhang, Shaohua Dong, Guangtao Cao, and Guangwei Hu
Opt. Lett. 45(15) 4140-4143 (2020)
Xueyang Zong, Lixia Li, Kun Yu, and Yufang Liu
Opt. Express 30(24) 43104-43117 (2022)
Meibao Qin, Shuyuan Xiao, Wenxing Liu, Mingyu Ouyang, Tianbao Yu, Tongbiao Wang, and Qinghua Liao
Opt. Express 29(12) 18026-18036 (2021)