Tailoring SHG nonlinearities in asymmetric triple quantum wells: The interplay between potential configuration and intense laser field tunability
International Journal of Modern Physics B, cilt.40, sa.21, ss.1-13, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 40 Sayı: 21
- 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)
- Sayfa Sayıları: ss.1-13
- 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 ((Formula presented)). The ILF causes substantial structural deformation in all ATQWs, especially the AITGQW, which nearly becomes an asymmetric single well at (Formula presented)(Formula presented)nm. The optimal SHG response is highly sensitive to the interplay between potential geometry and the ILF. The ATSPQW exhibits its maximum SHG peak at (Formula presented)(Formula presented)nm, whereas the AITGQW, AITSPQW and ATGQW peak at (Formula presented)(Formula presented)nm. At (Formula presented), the AITSPQW shows the largest DMME product; at (Formula presented)(Formula presented)nm, 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.