Complete optical absorption in hybrid halide perovskites based on critical coupling in the communication band

Zi-Qiang Cheng; Xin Luo; Liang Xu; Xiang Zhai; Ling-Ling Wang

doi:10.1364/OE.392998

Complete optical absorption in hybrid halide perovskites based on critical coupling in the communication band

Opt Express. 2020 Apr 27;28(9):14151-14160. doi: 10.1364/OE.392998.

Authors

Zi-Qiang Cheng, Xin Luo, Liang Xu, Xiang Zhai, Ling-Ling Wang

PMID: 32403875
DOI: 10.1364/OE.392998

Abstract

In order to remarkably enhance the absorption capability of (CH₃NH₃)PbI₃, a tunable narrow-band (CH₃NH₃)PbI₃-based perfect absorber based on the critical coupling with guided resonance is proposed. By using the finite-difference time-domain (FDTD) simulations, a complete absorption peak is achieved at the wavelength of 1310 nm. Moreover, we have compared the simulation results with theoretical calculations, which agree well with each other. By changing related structural parameters, the wavelength of absorption peak can be tuned effectively. Furthermore, the proposed absorber can tolerate a relatively wide range of incident angles and demonstrate polarization-independence. In addition to (CH₃NH₃)PbI₃, the complete optical absorption in the other halide perovskites can be realized by the same mechanism.