Size dependent effective band gap, optical absorption coefficients and refractive index changes in a wide ZnS/Zn1−xMgxS strained quantum well

Elangovan, P.; Peter, A. John

doi:10.1016/j.physb.2012.03.073

Cited by 2 publications

(1 citation statement)

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“…The linear variation of the binding energy with the increase in the Zn alloy content for all the dot radii is observed in the insert figure. However, the increase in binding energy is faster for the smaller dot radius than the larger dots due to the geometrical confinement [25].…”

Section: Resultsmentioning

confidence: 98%

Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd_{1 − x}Zn_xSe/ZnSe parabolic quantum dot

Jasmine

Peter²,

Lee

2014

Phys. Scr.

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Theoretical investigations on the absorption spectra for the intersubband optical transitions in a Cd1 − xZnxSe/ZnSe quantum dot are performed. Calculations on the electronic states are investigated using a variational scheme within the single band effective mass approximation and the optical gain is calculated using the compact density matrix approach with the iterative procedure. 2p-1s like transition energy and the spontaneous transition lifetime of the shallow donor hydrogenic impurity with the geometrical confinement and the Zn alloy content in a Cd1 − xZnxSe/ZnSe quantum dot are computed. The optical gain as a function of incident photon energy with the effects of spatial confinement and the Zn composition is found. The results show the dependence of the transition energy on the electron density in the Cd0.8Zn0.2Se/ZnSe quantum dot and the magnitude of the optical absorption coefficient enhances when the electron density increases. It is observed that a 1.55 μm wavelength is achieved for a 22 Å radius of a Cd1 − xZnxSe/ZnSe quantum dot. This band gap tunability brings out the possibility for near-infrared detectors, fiber optical communication systems and absorption modulators.

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Section: Resultsmentioning

confidence: 98%

Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd_{1 − x}Zn_xSe/ZnSe parabolic quantum dot

Jasmine

Peter²,

Lee

2014

Phys. Scr.

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Interband optical absorption in wurtzite MgxZn1−xO/ZnO/MgyZn1−yO asymmetric quantum wells

Zhu

Wang

et al. 2017

Superlattices and Microstructures

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Size dependent effective band gap, optical absorption coefficients and refractive index changes in a wide ZnS/Zn1−xMgxS strained quantum well

Cited by 2 publications

References 23 publications

Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd_{1 − x}Zn_xSe/ZnSe parabolic quantum dot

Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd_{1 − x}Zn_xSe/ZnSe parabolic quantum dot

Interband optical absorption in wurtzite MgxZn1−xO/ZnO/MgyZn1−yO asymmetric quantum wells

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Size dependent effective band gap, optical absorption coefficients and refractive index changes in a wide ZnS/Zn1−xMgxS strained quantum well

Cited by 2 publications

References 23 publications

Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd1 − xZnxSe/ZnSe parabolic quantum dot

Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd1 − xZnxSe/ZnSe parabolic quantum dot

Interband optical absorption in wurtzite MgxZn1−xO/ZnO/MgyZn1−yO asymmetric quantum wells

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Product

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Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd_{1 − x}Zn_xSe/ZnSe parabolic quantum dot

Mid-infrared optical transitions of a hydrogenic impurity in the conduction band of a Cd_{1 − x}Zn_xSe/ZnSe parabolic quantum dot