Linear and nonlinear optical absorption coefficients in InGaN/GaN quantum wells: Interplay between intense laser field and higher-order anharmonic potentials

Redouane En-Nadir; Mohamed A Basyooni-M Kabatas; Mohammed Tihtih; Haddou El Ghazi

doi:10.1016/j.heliyon.2023.e22867

Linear and nonlinear optical absorption coefficients in InGaN/GaN quantum wells: Interplay between intense laser field and higher-order anharmonic potentials

Heliyon. 2023 Nov 25;9(12):e22867. doi: 10.1016/j.heliyon.2023.e22867. eCollection 2023 Dec.

Authors

Redouane En-Nadir¹, Mohamed A Basyooni-M Kabatas^{2

3

4}, Mohammed Tihtih⁵, Haddou El Ghazi^{1

6}

Affiliations

¹ University of Sidi Mohamed Ben Abdullah, Fez, B.P. 2202, Morocco.
² Dynamics of Micro and Nano Systems, Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628, CD, Delft, Netherlands.
³ Department of Nanotechnology and Advanced Materials, Graduate School of Applied and Natural Science, Selçuk University, Konya, 42030, Turkey.
⁴ Space Research Laboratory, Solar and Space Research Department, National Research Institute of Astronomy and Geophysics, Cairo, Egypt.
⁵ Institute of Ceramic and Polymer Engineering, University of Miskolc, Miskolc, 3515, Hungary.
⁶ 2SMPI Group, ENSAM, University Hassan-II University, Casablanca, 20670, Morocco.

Abstract

This computational investigation delves into the electronic and optical attributes of InGaN/GaN nanostructures subjected to both harmonic and anharmonic confinement potentials, coupled with the influence of a nonresonant intense laser field (ILF). The theoretical framework incorporates higher-order anharmonic terms, specifically quartic and sextic terms. The solutions to the Schrödinger equation have been computed employing the finite element method and the effective mass theory. Moreover, linear and third-order nonlinear optical absorption coefficients are derived via a density matrix expansion. Our analysis reveals the feasibility of manipulating electronic and optical properties by adjusting confinement potential parameters, system attributes, and laser field intensity. In addition, the ILF induces remarkable modifications, characterized by reduced resonance peak amplitudes and a blue shift in absorption coefficients. Intriguingly, regardless of potential harmonicity, the impact of incident electromagnetic intensity is notably more pronounced in the absence of the ILF. These findings hold significant promise for advancing theoretical predictions, providing valuable insights into the intricate interplay between confinement potentials, laser fields, and their effects on electronic and optical behaviors within nanostructures.

Keywords: Absorption; Harmonicity; III-Nitrides; ILF; Nanostructure.