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Generating broadband second harmonics using TIR-QPM and guided wave optics approach – a comparative analysis with some important isotropic semiconductors

BHASWATI MEDHI1, SUMITA DEB1,*

Affiliation

  1. Department of Electrical Engineering, National Institute of Technology Agartala, Agartala-799046, Tripura, India

Abstract

This paper is oriented towards a comparative study on three different isotropic semiconductor slab materials, viz., Gallium Arsenide (GaAs), Zinc Selenide (ZnSe) and Zinc Telluride (ZnTe), using the concept of highly multimodal nonlinear guided wave approach for understanding the second harmonic light generation (SHG) in the mid-infrared region (MIR) by total internal reflection quasi phase matching (TIR-QPM). The optical losses like the Goos- Hänchen (GH) shift, surface roughness and absorption loss along with the nonlinear law of reflection have been considered, when simulating the results in terms of peak conversion efficiency and 3dB bandwidth. The effect of nonlinear law of reflection is also incorporated when the slab is varied in terms of its length and thickness..

Keywords

Guided wave optics, Second harmonic generation, Isotropic semiconductors, Non-linear law of reflection.

Citation

BHASWATI MEDHI, SUMITA DEB, Generating broadband second harmonics using TIR-QPM and guided wave optics approach – a comparative analysis with some important isotropic semiconductors, Optoelectronics and Advanced Materials - Rapid Communications, 12, 7-8, July-August 2018, pp.381-387 (2018).

Submitted at: July 18, 2017

Accepted at: Aug. 9, 2018