Intersubband optical absorption coefficients and refractive index changes in a parabolic cylinder quantum dot

Vahdani, M.R.K.; Rezaei, G.

doi:10.1016/j.physleta.2009.11.038

Cited by 89 publications

(35 citation statements)

References 23 publications

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“…In order to calculate the coefficients of NOR, SHG and THG, one considers that the system is irradiated by a light field with frequency ω applied with polarization along the growth direction of the quantum well. Interaction of electromagnetic field with the system can be evaluated by means of the density-matrix approach and iterative procedure [39,40]. As a consequence, the following expressions for the NOR, SHG and THG susceptibility are obtained [1,9] χ…”

Section: Methodsmentioning

confidence: 99%

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

Şakiroğlu

2017

SDÜ Fen Bil Enst Der

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Abstract: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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Section: Methodsmentioning

confidence: 99%

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

Şakiroğlu

2017

SDÜ Fen Bil Enst Der

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“…In this work we are presenting a deep understanding of the OR and SHG in a three-level dome-shaped InAs/GaAs QDs with WL using finite element method (FEM) and compact density matrix framework. The WL zone which is usually ignored in some of the preceding articles [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63] is fully adopted as well as its effect on second order nonlinear phenomena is investigated. By taking all resonant and nonresonant terms of second order nonlinear susceptibility under consideration, the effect of all expressions is being highlighted.…”

Section: Introductionmentioning

confidence: 99%

Optical Rectification and Second Harmonic Generation on Quasi-Realistic InAs/GaAs Quantum Dots: With Attention to Wetting Layer Effect

Khaledi-Nasab

Sabaiean

Sahrai

et al. 2013

ISRN Condensed Matter Physics

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In this paper, we have performed a theoretical study on nonlinear optical rectification (OR) and second harmonic generation (SHG) for three-level dome-shaped InAs/GaAs quantum dots (QDs) in the presence of wetting layer (WL). We used the compact density matrix framework and effective mass approximation to investigate the second order nonlinear phenomena on InAs/GaAs QD. It is demonstrated that second harmonic generation (SHG), optical rectification (OR), and their mutual absorption and refractive index changes are quite sensitive to the size of QDs. The size variations have profound irregular behavior owing to distribution of envelope function on WL and QD simultaneously. Moreover it is found that = 13 nm is a critical radius where the regular variation takes place. It is shown that size variation causes blue shift until Critical radius ( = 13 nm) and after that, increasing the QD size lead to redshift in second order phenomena.

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“…The theoretical analysis demonstrated clearly that the blueshifting of the absorption onset is related with decreasing particle size. Interband transitions for cylindrical QDs were studied in 7,8,9,10 . In cylindrical QDs one can vary two geometrical parameters (height and radius of the cylinder).…”

Section: Introductionmentioning

confidence: 99%

Magneto-Absorption in Ellipsoidal Quantum Dot

Dvoyan

Evoyan

Kazaryan

et al. 2012

Int. J. Mod. Phys. Conf. Ser.

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The absorption of light in ellipsoidal quantum dot in the presence of a magnetic field is discussed using perturbation theory. Also the same problem is discussed using the normal modes. Quantum dot absorption coefficient is calculated -as well as threshold frequency of absorption -as a function of applied magnetic field. Theoretical results are compared with experimental data obtained by magneto-luminescence method in In 0.53 Ga 0.47 As quantum dot (M.

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Intersubband optical absorption coefficients and refractive index changes in a parabolic cylinder quantum dot

Cited by 89 publications

References 23 publications

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

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

Optical Rectification and Second Harmonic Generation on Quasi-Realistic InAs/GaAs Quantum Dots: With Attention to Wetting Layer Effect

Magneto-Absorption in Ellipsoidal Quantum Dot

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