2016

Asimetrik Kuantum Kuyusunda Elektrik-alan-indüklemeli Lineer-olmayan Optik Dogrultma, ˘ ˙Ikinci- ve Üçüncü-harmonik Üretim

Morse potansiyeli ile tanımlanan kuantum kuyusunda, statik elektrik alanın lineerolmayan optik dogrultma, ikinci- ve üçüncü-harmonik üretim üzerine etkile ˘ ri teorik olarak ara¸stırlmı¸stır. Uygulanan elektrik alan ile gerçekle¸sen altbantlar arası optik geçi¸slere ili¸sin optik katsayıların analitik ifadeleri kompakt-yogunluk matrisi yakla¸sımı ˘ ve iteratif ¸semadan elde edilmi¸stir. Tipik GaAs kuantum kuyusu için sunulan nümerik sonuçlar, boyut-kuantize altbantlar arası optik geçi¸slerin kontrol edilebilirligini ortaya ˘ koymaktadır. Buna ilaveten, sistemin optik cevabının elektrik alana ve yapı erim parametresine oldukça duyarlı oldugunu vurgulamalıyız.

Electric-field-induced Nonlinear Optical Rectification, Second- and Third-harmonic Generation in Asymmetrical Quantum Well

The effects of a static electric field on the nonlinear optical rectification, second- and third-harmonic generation in a quantum well described by Morse potential are theoretically investigated. Analytical expressions for the optical coefficients due to intersubband optical transitions with an applied electric field are extracted from the compact-density matrix approach and iterative scheme. Numerical results presented for a typical GaAs quantum well reveal the feasibility of control of optical transitions between the size-quantized subbands. In addition, we have to emphasize the fact that the optical response of the system is remarkably sensitive to the electric field and structural range parameter.

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