Rotation angle effect of intense THz radiation on second harmonic generation coefficient in a coupled cylindrical–triangular GaAs/AlGaAs quantum wire
Solid State Communications, cilt.416, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 416
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.ssc.2026.116506
- Dergi Adı: Solid State Communications
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Coupling, Intense THz radiation, Quantum wire, Rotation, Second harmonic generation
- Sivas Cumhuriyet Üniversitesi Adresli: Evet
Özet
In this study, the second-harmonic generation (SHG) coefficient is examined depending on the rotation angle of intense THz radiation (intense laser field) in GaAs/AlGaAs coupled cylindrical-triangular quantum wire structure. Using the effective mass approximation, the time-independent Schrödinger equation is solved through the finite element method to obtain the wave functions and energy eigenvalues. Based on these results, SHG coefficients are simulated as a function of the rotation angle of the intense THz radiation and wire coupling distance. The rotation angle varies from 0° to 90° and reveals strong anisotropic behavior in the nonlinear response. For an intense THz radiation of 3 nm and a rotation angle of 90°, the SHG coefficient reaches approximately ∼2163x10−10m/V, significantly surpassing previously reported values. These findings demonstrate that the SHG coefficient of cylindrical-triangular quantum wire systems can be effectively tailored by controlling the rotation direction of the intense THz radiation (or the coupling distance). This offers a promising pathway for tunable THz photonic and nonlinear optical devices with advancement in the nano fabrication capabilities.