Document Type
Article
Publication Date
8-1-2020
Department
Marine Science
School
Ocean Science and Engineering
Abstract
This paper presents three-photon absorption (3PA) measurement results for nine direct-gap semiconductors, including full 3PA spectra for ZnSe, ZnS, and GaAs. These results, along with our theory of 3PA using an eight-band Kane model (four bands with double spin degeneracy), help to explain the significant disagreements between experiments and theory in the literature to date. 3PA in the eight-band model exhibits quantum interference between the various possible pathways that is not observed in previous two-band theories. We present measurements of degenerate 3PA coefficients in InSb, GaAs, CdTe, CdSe, ZnTe, CdS, ZnSe, ZnO, and ZnS. We examine bandgap, Eg, scaling using -band tunneling and perturbation theories that show agreement with the predicted Eg−7 dependence; however, for those semiconductors for which we measured full 3PA spectra, we observe significant discrepancies with both two-band theories. On the other hand, our eight-band model shows excellent agreement with the spectral data. We then use our eight-band theory to predict the 3PA spectra for 15 different semiconductors in their zinc-blende form. These results allow prediction and interpretation of the 3PA coefficients for various narrow to wide bandgap semiconductors.
Publication Title
Optica
Volume
7
Issue
8
First Page
888
Last Page
889
Recommended Citation
Benis, S.,
Cirloganu, C. M.,
Cox, N.,
Ensley, T.,
Hu, H.,
Nootz, G.,
Olszak, P. D.,
Padilha, L. A.,
Peceli, D.,
Reichert, M.,
Webster, S.,
Woodall, M.,
Hagan, D. J.,
Van Stryland, E. W.
(2020). Three-Photon Absorption Spectra and Bandgap Scaling In Direct-Gap Semiconductors. Optica, 7(8), 888-889.
Available at: https://aquila.usm.edu/fac_pubs/18536