Kısa Erimli Dipsiz Üstel Potansiyelli Bir Kuantum Kuyusunun Doğrusal Olmayan Optiksel Özellikleri

Yıl 2018, Cilt: 39 Sayı: 4, 934 - 939, 24.12.2018

Fatih Ungan

https://doi.org/10.17776/csj.478719

Öz

Sunulan bu çalışmada, kısa erimli dipsiz üstel
potansiyelli bir GaAs kuantum kuyusunun doğrusal olmayan optiksel özellikleri
üzerine kuşatma potansiyelinin derinliğinin etkisi ayrıntılı olarak
çalışılmıştır. Bu yapının enerji özdeğer ve özfonksiyonları etkin kütle ve zarf
fonksiyonu yaklaşımı çerçevesinde hesaplanmıştır. Doğrusal, üçüncü dereceden
doğrusal olmayan ve toplam soğurma katsayısı ve bağıl kırılma indisindeki
değimleri için analitik formüller kompakt yoğunluklu matris yaklaşımı (CDMA) ve
yineleme yöntemi kullanarak elde edilmiştir. Bu modele dayanarak, elde ettiğimiz
sayısal sonuçları kuşatma potansiyelinin derinliğinin birkaç değeri için gelen
foton enerjisinin bir fonksiyonu olarak rapor ettik. Sonuçlar doğrusal, üçüncü
dereceden doğrusal olmayan ve toplam soğurma katsayılarının ve bağıl kırılma
indisi değişimlerinin kuşatma potansiyelinin derinliğinden kuvvetli bir şekilde
etkilendiğini göstermiştir.

Anahtar Kelimeler

Kuantum kuyusu, doğrusal olmayan optiksel özellikler

Nonlinear Optical Properties of a Quantum Well With Short-Range Bottomless Exponential Potential

Öz

In the present study, the effect of the depth of the confinement
potential on the nonlinear optical of a GaAs quantum well with short-range
bottomless exponential potential is studied in detail. The energy eigenvalues
and eigenfunctions of this structure are calculated within the framework of
effective mass and envelope function approximations. Analytic formulas for the
linear, third-order nonlinear and total absorption coefficients and relative
refractive index changes are obtained using the compact-density matrix approach
(CDMA) and iterative method. Based on this model, our obtained numerical
results are reported as a function of incident photon energy for several values
of the depth of the confinement potential. The results show that the linear,
third order nonlinear, and total absorption coefficients and relative
refractive index changes are strongly affected by the depth of the confinement
potential.

Anahtar Kelimeler

Quantum well, nonlinear optical properties

Kaynakça

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