Hydrostatic pressure and temperature effects on nonlinear optical rectification in a lens shape InAs/GaAs quantum dot

Bouzaı̈ene, L.; Mahrsia, R. Ben; Baïra, M.; Sfaxi, L.; Maâref, H.

doi:10.1016/j.jlumin.2012.09.032

Cited by 59 publications

(24 citation statements)

References 21 publications

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“…These factors caused the reduction of SONS when the field increased to 100 kV∕cm, making them the important factors causing the high SONS in QDs. The obtained result for SONS is in the range of that for QDs with other shapes [20,21]. Figure 4 shows SONS for different QD sizes that are stated in Table 1.…”

Section: Wl-qd Transitionmentioning

confidence: 61%

Terahertz emission in ladder plus Y-configurations in double quantum dot structure

2015

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The ladder plus Y-double quantum dot (QD) structure has been proposed to improve the second-order nonlinear susceptibility (SONS) under applied electric field. For this purpose, the wetting layer (WL) and QD inhomogeneity contribution in SONS has been considered. In addition, the structure size effect, energy level separation, momentum matrix elements, and pump detuning have been examined, and show that the SONS is increased by using the WL, a low momentum matrix element of WL-QD transition in comparison with interdot transition while QD inhomogeneity reduces SONS to half. This work is predicted to play a key role in terahertz applications, since the frequency emissions obtained are in the range of 75.5-600 μm.

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Section: Wl-qd Transitionmentioning

confidence: 61%

Terahertz emission in ladder plus Y-configurations in double quantum dot structure

2015

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“…In QDs the spin-orbit interaction decreases the magnitude of OR as well as the peaks which happen at lower energies but the donor impurity causes a big shift in the magnitude of the OR peaks position as reported by Chen et al and Vaseghi et al respectively [33,34]. Recently it is found that the OR in lense-shaped QDs is quite sensitive to the applied hydrostatic pressure and temperature [35]. The Polaron effect in OR and SHG in cylindrical QDs was studied by Liu et al [36]; indeed they made a focus on the dependence of both the OR and the SHG on confinement frequency, external magnetic field, and the linear potential coefficient .…”

Section: Introductionmentioning

confidence: 75%

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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“…From Fig.2(a), the following points can be deduced: (1) The magnitude of the OR coefficient decreases as the hydrostatic pressure increases. The physical reason is that the hydrostatic pressure has an effect similar to reducing the confinement, which increases the electrons effective mass, and this in turn results in a decrease of the strength confinement [28]. To look at this behavior accurately, the dipole matrix element µ 01 δ 01 is plotted as a function of the hydrostatic pressure.…”

Section: Resultsmentioning

confidence: 99%

The nonlinear optical rectification and second harmonic generation in asymmetrical Gaussian potential quantum well: Effects of hydrostatic pressure, temperature and magnetic field

et al. 2016

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In the present work, the effects of hydrostatic pressure, temperature, and magnetic field on the nonlinear optical rectification (OR) and second-harmonic generation (SHG) in asymmetrical Gaussian potential quantum well (QW) have been investigated theoretically. Here, the expressions for the optical properties are calculated by the compact-density-matrix approach and iterative method. Simultaneously, the energy eigenvalues and their corresponding eigenfunctions have been obtained by using the finite difference method. The energy eigenvalues and the shape of the confined potential are modulated by the hydrostatic pressure, temperature, and magnetic field. So the results of a number of numerical experiments indicate that the nonlinear OR and SHG strongly depends on the hydrostatic pressure, temperature, and magnetic field. This gives a new degree of freedom in various device applications based on the intersubband transitions of electrons.

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Hydrostatic pressure and temperature effects on nonlinear optical rectification in a lens shape InAs/GaAs quantum dot

Cited by 59 publications

References 21 publications

Terahertz emission in ladder plus Y-configurations in double quantum dot structure

Terahertz emission in ladder plus Y-configurations in double quantum dot structure

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

The nonlinear optical rectification and second harmonic generation in asymmetrical Gaussian potential quantum well: Effects of hydrostatic pressure, temperature and magnetic field

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