Anisotropy effect on the nonlinear optical properties of a three-dimensional quantum dot confined at the center of a cylindrical nano-wire

Safarpour, Gh.; Izadi, Mohammad; Novzari, M.; Niknam, E.; Moradi, Mahmood

doi:10.1016/j.physe.2014.01.007

Cited by 37 publications

(6 citation statements)

References 44 publications

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“…As the noise strength ζ starts fluctuating with time either periodically or randomly, the ground state electronic population immediately begins to scatter among all the higher states. In conclusion, the time-development, the time-average excitation rate (TAER) have been determined following the variation of a few physical quantities such as the magnetic field (B), the confinement potential (ω 0 ), dopant location (r 0 ), dopant potential strength (V 0 ), binding energy (BE), the aluminum concentration (x) (for Al x Ga 1Àx As QD), [22] geometrical anisotropy, [39][40][41][42] positiondependent effective mass (PDEM), [43][44][45][46][47][48][49][50][51] position-dependent dielectric screening function (PDDSF), [43,45,52,53] hydrostatic pressure (HP), [54][55][56][57] temperature (T ), [55][56][57] anharmonicity constant (k) and the initial value of the noise strength [ζ(0)]. In one of our recent works, we have explored TAER but in an entirely different context.…”

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confidence: 99%

Analyzing Time‐Average Excitation Rate Among Quantum Dot Eigenstates Triggered by Time‐Dependent Noise Strength

Datta¹,

Arif

Roy³

et al. 2022

Physica Status Solidi (b)

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Quantum dots (QDs) are acclaimed low-dimensional nanosystems, where we find complete spatial arrest of the motion of the carriers (electrons and holes). Their extremely small dimension helps them display quantum manifestations through various size-dependent physical properties. These properties can be tuned externally thereby making QDs immensely valuable components of technologically advanced devices. As a result, we frequently find research works that analyze various aspects of the low-dimensional nanosystems, [1][2][3][4][5][6][7][8] particularly emphasizing their nonlinear optical (NLO) responses. The effective confinement potential (ECP) of QD principally controls its energy spectrum and the eigenstates. Thus, modulation of ECP can be useful to tailor its properties and consequent applications in fabricating advanced quantum devices. Doping of impurity to QD influences its ECP, which, in turn, profoundly modulates its physical properties. Consequently, studies delving into the impurity effects in QD and other low-dimensional nanosystems are found to be quite abundant.

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confidence: 99%

Analyzing Time‐Average Excitation Rate Among Quantum Dot Eigenstates Triggered by Time‐Dependent Noise Strength

Datta¹,

Arif

Roy³

et al. 2022

Physica Status Solidi (b)

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“…The said routes are prominently distinct in view of system‐noise interaction and often lead to different outcomes with respect to the noise‐free environment. The study analyses the OG profiles pursuing the variation of a handful of relevant physical parameters such as electric field ( F ), magnetic field ( B ), confinement potential (

ω_{0}

), dopant location (

r_{0}

), dopant potential (

V_{0}

), binding energy (BE), aluminum concentration ( y ) (considering

{Al}_{y} {Ga}_{1 - y} As

QD), [ 23 ] noise strength ( ζ ), position‐dependent effective mass (PDEM), [ 55–61 ] position‐dependent dielectric screening function (PDDSF), [ 55,62,63 ] geometrical anisotropy, [ 64–67 ] HP, and temperature ( T ). The study divulges the salient features of OG profile of doped QD under the supervision of noise when different physical parameters undergo gradual change.…”

Section: Introductionmentioning

confidence: 99%

Profiles of Optical Gain of Impurity‐Doped Quantum Dots under the Stewardship of Gaussian White Noise

Arif

Roy²,

Bera

et al. 2022

Physica Status Solidi (b)

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The optical gain (OG) of quantum dots containing impurity is dealt with in the present investigation under the governance of applied Gaussian white noise. In this regard, various pertinent physical parameters are varied over a range and the resulting variations of OG are thoroughly monitored. Along with OG, the profiles of the gain radiative current density and the bandgap are also analyzed. The authors have come across that the presence/absence of noise, the mode of application of noise (additive/multiplicative), the particular physical parameter concerned, and the range of magnitude of the physical parameter, in unison, govern the features of the OG profiles in diverse ways. The study reveals that tuning of various physical parameters under applied noise in some preferred mode can be useful for the attainment of high OG and saturation gain. Tuning of emission wavelength can also be exploited to design tunable light sources.

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“…Makalede yazarlar, soğurma katsayısının maksimumu elektrik alanın artmasıyla, düşmesi ve gelen foton enerjisine göre sağa kaymasını gözlemlemişler. Buna benzer sonuçlar [15][16][17][18][19][20][21] makalelerinde de elde edilmiştir.…”

Section: Introductionunclassified

Yarıiletken Silindirik Kuantum Noktanın Optik Özellikleri

Babanli

Sabyrov

2022

Süleyman Demirel Üniversitesi Fen Edebiyat Fakültesi Fen Dergisi

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Bu çalışmada yarıiletken silindirik kuantum noktanın optik özellikleri araştırılmıştır. Etkin kütle ve parabolik bant yaklaşımı dikkate alınarak yarıiletken silindirik kuantum noktanın enerji spektrumu ve dalga fonksiyonu köşegenleştirme yöntemiyle hesaplanmıştır. Elde ettiğimiz öz değer ve öz fonksiyon ifadelerini kullanarak alt enerji seviyeler arası optik geçişler için soğurma katsayısını hesaplamak için kullanılmıştır. Yarıiletken silindirik kuantum noktanın soğurma katsayısı gelen foton enerjisinin fonksiyonu olarak silindirin yarıçapı ve yüksekliği gibi parametrelerinin farklı değerlerine göre davranışı sayısal olarak araştırılmıştır. Ayrıca soğurma katsayı manyetik alanın farklı değerlerine göre değişimi araştırılmıştır. Elde edilen sonuçlara göre yarıiletken kuantum noktanın soğurma katsayısı manyetik alanın değişiminden bağımsız ve silindirin yarıçap ve yükseklik parametrelerinin değişimine bağlı olduğu görülmüştür.

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Anisotropy effect on the nonlinear optical properties of a three-dimensional quantum dot confined at the center of a cylindrical nano-wire

Cited by 37 publications

References 44 publications

Analyzing Time‐Average Excitation Rate Among Quantum Dot Eigenstates Triggered by Time‐Dependent Noise Strength

Analyzing Time‐Average Excitation Rate Among Quantum Dot Eigenstates Triggered by Time‐Dependent Noise Strength

Profiles of Optical Gain of Impurity‐Doped Quantum Dots under the Stewardship of Gaussian White Noise

Yarıiletken Silindirik Kuantum Noktanın Optik Özellikleri

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