Effects of applied external fields on the nonlinear optical rectification, second, and third-harmonic generation in an asymmetrical semi exponential quantum well
Citation
Sayrac, M. Effects of applied external fields on the nonlinear optical rectification, second, and third-harmonic generation in an asymmetrical semi exponential quantum well. Opt Quant Electron 54, 52 (2022). https://doi.org/10.1007/s11082-021-03425-6Abstract
The asymmetric potential profiles are focus of interest for researchers who study semiconductor
optoelectronic devices. Therefore, in this study, the effects of structure parameters
(σ and V0)
and applied external perturbations such as electric (F), magnetic (B), and nonresonant
monochromatic intense laser field on the nonlinear optical properties of the asymmetric
semi-exponential quantum well (ASEQW) are theoretically investigated. The nonlinear
optical rectification (NOR), second-harmonic generation (SHG), and third harmonic
generation (THG) coefficients of ASEQW structure are considered. Theoretical investigations
on these optical coefficients are performed in two steps. Step 1: The energy eigenvalues
and eigenfunctions of a confined single electron in the ASEQW are obtained by using
the diagonalization method within the framework of the effective mass and parabolic band
approaches. Step 2: The compact density matrix approximation has been used to calculate
the coefficients of the nonlinear optical response in the structure. The numerical results
reveal that the structural parameters and external fields change the confinement potential
profile of the system, and these effects significantly affect the NOR, SHG, and THG coefficients
based on intersubband (intraband or subband) transitions in a low-dimensional
quantum system. As a result, the amplitude and peak position of these optical coefficients
are easily controlled by the applied external fields and can be adjusted according to the
purpose.
Source
Optical and Quantum ElectronicsVolume
54Issue
52URI
https://link.springer.com/article/10.1007/s11082-021-03425-6https://hdl.handle.net/20.500.12418/13388