Tailoring SHG nonlinearities in asymmetric triple quantum wells: The interplay between potential configuration and intense laser field tunability
International Journal of Modern Physics B, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1142/s0217979226502048
- Dergi Adı: International Journal of Modern Physics B
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Compendex, INSPEC, zbMATH, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO), Technology Collection (ProQuest)
- Anahtar Kelimeler: Asymmetric triple quantum well, intense laser field
- Sivas Cumhuriyet Üniversitesi Adresli: Evet
Özet
This study investigates the effect of an intense laser field (ILF) on the nonlinear optical properties of four asymmetric triple quantum well (ATQW) structures with distinct potentials: The asymmetric triple graded QW (ATGQW), the asymmetric inverse triple graded QW (AITGQW), the asymmetric triple semi-parabolic QW (ATSPQW), and the asymmetric inverse triple semi-parabolic QW (AITSPQW). Variations in confined energy levels, dipole moment matrix elements (DMMEs), and second harmonic generation (SHG) coefficients were analyzed as a function of the ILF parameter (α0). The ILF causes substantial structural deformation in all ATQWs, especially the AITGQW, which nearly becomes an asymmetric single well at α0=6nm. The optimal SHG response is highly sensitive to the interplay between potential geometry and the ILF. The ATSPQW exhibits its maximum SHG peak at α0=6nm, whereas the AITGQW, AITSPQW and ATGQW peak at α0=3nm. At α0=0, the AITSPQW shows the largest DMME product; at α0=9nm, the AITGQW exhibits the smallest. These findings highlight the crucial role of potential asymmetry and ILF-induced modulation in tailoring QW optical nonlinearities for tunable, high-efficiency optoelectronic and nanophotonic devices.