Magneto-optical effects in quantum wells irradiated with light pulses

Contreras-Solorio, D. A.; Pavlov, S. T.; Korovin, L. I.; Lang, I. G.

doi:10.1103/physrevb.62.16815

Cited by 17 publications

(37 citation statements)

References 11 publications

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“…where A η is the resonant term from (11). The expression (12) is universal one: It is applicable to any lowdimensional semiconductor objects, including the presence of quantizing magnetic field.…”

Section: The Quantum Theorymentioning

confidence: 99%

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Elastic light scattering by semiconductor quantum dots of arbitrary shape

2007

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Elastic light scattering by low-dimensional semiconductor objects is investigated theoretically. The differential cross section of resonant light scattering on excitons in quantum dots is calculated. The polarization and angular distribution of scattered light do not depend on the quantum-dot form, sizes and potential configuration if light wave lengths exceed considerably the quantum-dot size. In this case the magnitude of the total light scattering cross section does not depend on quantum-dot sizes. The resonant total light scattering cross section is about a square of light wave length if the exciton radiative broadening exceeds the nonradiative broadening. Radiative broadenings are calculated.

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Section: The Quantum Theorymentioning

confidence: 99%

“…Thirdly, the quasi-classical method allows to go from a monochromatic irradiation to a pulse irradiation and to obtain new interesting results [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Elastic light scattering by semiconductor quantum dots of arbitrary shape

2007

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“…In our previous papers [1][2][3][4], we calculated optical characteristics (such as the absorbance, reflectance, and transmittance) of a quantum well when a symmetric electromagnetic pulse is transmitted through it. In [4], we considered a narrow quantum well with one excited level and a homogeneous medium under conditions where the refractive indices of the barriers ( ν 1 ) and the quantum well ( ν ) are equal to each other.…”

Section: Introductionmentioning

confidence: 99%

10.1007/s11451-008-2020-1

Korovin¹,

Lang²,

Pavlov³

2010

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The reflectance, transmittance, and absorbance of a symmetric electromagnetic pulse with a carrier frequency close to the frequency of direct interband transitions in a quantum well are calculated. The energy levels in the quantum well are assumed to be discrete, and two closely spaced excited levels are taken into account. The theory holds true for quantum wells of an arbitrary width at which the quantum confinement is retained. The calculations are performed with due regard for the difference between the refractive indices of the quantum well and the barriers. In this case, there appears an additional reflection from the quantum-well boundaries. The additional reflection results in a substantial change in the shape of the reflected pulse as compared to that characteristic of a homogeneous medium. The reflection from the quantum-well boundaries disappears at specific ratios between the carrier frequency of the exciting pulse and the quantum-well width.

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“…In this case, it is impossible to be limited by linear approximation on interaction of electrons with electromagnetic field, and it is necessary to consider all the orders of this interaction 5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24 . Reflection, absorption and transmission of an electromagnetic wave, which interacts with discrete energy levels of electronic system in a quantum well in the region of frequencies corresponding to interband transitions, were considered in 13,14,15,16,17,18,19 . In these works, a stimulating light could be monochromatic 19 or pulse irradiation 13,14,15 .…”

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“…In these works, a stimulating light could be monochromatic 19 or pulse irradiation 13,14,15 . One 16 , two 17,19 and large number of excited energy levels 18 were considered. Results of these works are applicable for narrow quantum wells, when the inequality…”

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confidence: 99%

Effect of the anomalous dispersion on the optical characteristics of a quantum well

2006

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Frequency dependencies of optical characteristics (reflection, transmission and absorption of light) of a quantum well are investigated in a vicinity of interband resonant transitions in a case of two closely located excited energy levels. A wide quantum well in a quantizing magnetic field directed normally to the quantum-well plane, and monochromatic stimulating light are considered. Distinctions between refraction coefficients of barriers and quantum well, and a spatial dispersion of the light wave are taken into account. It is shown that at large radiative lifetimes of excited states in comparison with nonradiative lifetimes, the frequency dependence of the light reflection coefficient in the vicinity of resonant interband transitions is defined basically by a curve, similar to the curve of the anomalous dispersion of the refraction coefficient. The contribution of this curve weakens at alignment of radiative and nonradiative times, it is practically imperceptible at opposite ratio of lifetimes . It is shown also that the frequency dependencies similar to the anomalous dispersion do not arise in transmission and absorption coefficients. Optical methods are widely used at research of electronic properties of low-dimensional semiconductor systems during last decades 1,2,3,4 . It is connected mainly that after interactions with such system, the light wave contains an information about electronic processes, in particular, about an electronic spectrum, lifetimes of excited states and scattering mechanisms. Interesting results turn out, when energy levels of the electronic system are discrete that takes place in quantum dots and quantum wells. Discreteness of energy levels in a quantum well is provided by excitonic states (if incident light is perpendicular to the quantum-well plane), or by quantizing magnetic field directed perpendicularly to the quantum-well plane. In high-quality quantum wells, a radiative broadening of absorption lines at low temperatures and weak doping can be comparable with the contribution of nonradiative relaxation mechanisms or to exceed them. In this case, it is impossible to be limited by linear approximation on interaction of electrons with electromagnetic field, and it is necessary to consider all the orders of this interaction 5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24 . Reflection, absorption and transmission of an electromagnetic wave, which interacts with discrete energy levels of electronic system in a quantum well in the region of frequencies corresponding to interband transitions, were considered in 13,14,15,16,17,18,19 . In these works, a stimulating light could be monochromatic 19 or pulse irradiation 13,14,15 . One 16 , two 17,19 and large number of excited energy levels 18 were considered. Results of these works are applicable for narrow quantum wells, when the inequalityis carried out, where d is the quantum well width, κ is the module of the light wave vector. Actually above mentioned works are true in a zero approximation on the parameter κd.On the other hand...

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Magneto-optical effects in quantum wells irradiated with light pulses

Cited by 17 publications

References 11 publications

Elastic light scattering by semiconductor quantum dots of arbitrary shape

Elastic light scattering by semiconductor quantum dots of arbitrary shape

10.1007/s11451-008-2020-1

Effect of the anomalous dispersion on the optical characteristics of a quantum well

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