Abstract

Using GaAs as a test material, we investigated the redshift between emission and the optical bandgap. The knowledge of the energy difference, referred to as the Stokes shift, is of considerable importance for solid-state light sources because its magnitude defines the centered monochromaticity of the emission. Employing Fan’s theory, we reveal the basic parameters, which determine the Stokes shift, and provide an uncertainty analysis, considering both uncorrelated and correlated variables. We disclose that the considerable scatter of the dielectric constants in the literature causes uncertainties comparable to or even exceeding the mean. The work stresses that the high-frequency and static dielectric constants might be closer than the currently promoted numbers.

© 2022 Optica Publishing Group

Inherent photoluminescence Stokes shift in GaAs

Bruno Ullrich, Akhilesh K. Singh, Puspendu Barik, Haowen Xi, and Mithun Bhowmick
Opt. Lett. 40(11) 2580-2583 (2015)

Thin active region HgCdTe-based quantum cascade laser with quasi-relativistic dispersion law

A. A. Dubinov, D. V. Ushakov, A. A. Afonenko, R. A. Khabibullin, M. A. Fadeev, and S. V. Morozov
Opt. Lett. 47(19) 5048-5051 (2022)

Optical random micro-phase-shift DropConnect in a diffractive deep neural network

Yong-Liang Xiao, Sikun Li, Guohai Situ, and Jianxin Zhong
Opt. Lett. 47(7) 1746-1749 (2022)

Optimal nonlinear Stokes–Mueller polarimetry for multi-photon processes

Xiaobo Li, Wei Liu, François Goudail, and Shih-Chi Chen
Opt. Lett. 47(13) 3287-3290 (2022)

Quantum terahertz Cherenkov radiation: theory and experimental feasibility

Hesham Fares
Opt. Lett. 47(11) 2915-2918 (2022)