Open AccessNonreciprocal Tamm plasmon absorber based on lossy epsilon-near-zero materials
Author(s) -
Hai Lu,
Ting Zhu,
Jun Zhang,
HongChao Liu,
Kesheng Shen,
Yun Zheng,
Shiqing Dong,
Shiqiang Xia,
Chao Dong,
Xinkai Li,
Wenyuan Luo,
Xiao-Long Sun,
Xianzhou Zhang,
Chunhua Xue
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.426030
Subject(s) - absorptance , materials science , optics , plasmon , polarization (electrochemistry) , photonic crystal , optoelectronics , thermophotovoltaic , metamaterial , wavelength , blueshift , physics , common emitter , photoluminescence , chemistry , reflectivity
Contrary to conventional Tamm plasmon (TP) absorbers of which narrow absorptance peaks will shift toward short wavelengths (blueshift) as the incident angle increases for both transverse magnetic (TM) and transverse electric (TE) polarizations, here we theoretically and experimentally achieve nonreciprocal absorption in a planar photonic heterostructure composed of an isotropic epsilon-near-zero (ENZ) slab and a truncated photonic crystal for TM polarization. This exotic phenomenon results from the interplay between ENZ and material loss. And the boundary condition across the ENZ interface and the confinement effect provided by the TP can enhance the absorption in the ENZ slab greatly. As a result, a strong and nonreciprocal absorptance peak is observed experimentally with a maximum absorptance value of 93% in an angle range of 60∼70°. Moreover, this TP absorber shows strong angle-independence and polarization-dependence. As the characteristics above are not at a cost of extra nanopatterning, this structure is promising to offer a practical design in narrowband thermal emitter, highly sensitive biosensing, and nonreciprocal nonlinear optical devices.