Optically active energy states of the exciton in quantum wells of various widths

Belov, Pavel A.

doi:10.1088/1742-6596/1482/1/012018

Cited by 2 publications

(2 citation statements)

References 40 publications

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“…Determination of the value of the radiative broadening Ŵ R from the experiment requires exact measurement of the surface reflectance, which raises difficulties, as the sample surface is not perfect. That is why the reflectance was selected so that the radiative broadening value might coincide with the results of the microscopic calculation: Ŵ R = 37 µeV [12,13]. For the resonance Xlh the energy ω X = 1.530056 eV and the radiative broadening Ŵ R = 15 µeV, which is about 2.5 times smaller than for the Xhh.…”

Section: Experiments and Processing Of Resultsmentioning

confidence: 99%

Non-trivial dependence of spectral characteristics of excitons in quantum wells on the resonant optical excitation power

et al. 2022

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Basic exciton parameters, such as the energy of exciton transition and the radiative and nonradiative broadenings, are experimentally studied by means of reflectance spectroscopy for a heterostructure with a 14-nm GaAs/AlGaAs quantum well. Particular attention is paid to the nonradiative broadening which is sensitive to densities of free carriers and long-lived nonradiative excitons. A sublinear increase of the broadening of the heavy-hole and light-hole exciton resonances is observed when the light-hole exciton resonance is excited with increasing power. A simple model is developed, which allows one to well reproduce the observed dependence. Keywords: exciton, quantum well, nonradiative broadening.

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Section: Experiments and Processing Of Resultsmentioning

confidence: 99%

Non-trivial dependence of spectral characteristics of excitons in quantum wells on the resonant optical excitation power

et al. 2022

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“…Определение величины радиационного уширения Ŵ R из эксперимента требует точного измерения коэффициента отражения, что вызывает трудности, поскольку поверхность образца не идеальна. Поэтому коэффициент отражения был выбран таким образом, чтобы величина радиационного уширения совпадала с результатами микроскопического расчeта: Ŵ R = 37 мкэВ[12,13]. Для резонанса Xlh энергия ω X = 1.530056 эВ и радиационное уширение Ŵ R = 15 мкэВ, что в ∼ 2.5 раза меньше, чем для Xhh.…”

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Нетривиальная Зависимость Спектральных Характеристик Экситонов В Квантовых Ямах От Мощности Резонансного Оптического Возбуждения

Мурсалимов¹,

Михайлов²,

Курдюбов³

et al. 2021

Физика И Техника Полупроводников

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Basic exciton parameters, the energy of exciton transition and the radiative and nonradiative broadenings, are experimentally studied by means of reflectance spectroscopy for a heterostructure with the 14-nm GaAs/AlGaAs quantum well. Particular attention is paid to the nonradiative broadening which is sensitive to optical creation of free carriers and long-lived nonradiative excitons. A sublinear increase of the broadening of the heavy-hole and light-hole exciton resonances is observed when the light-hole exciton resonance is excited with increasing power. A simple model is developed, which allows one to well reproduce the observed dependence.

show abstract

Optically active energy states of the exciton in quantum wells of various widths

Cited by 2 publications

References 40 publications

Non-trivial dependence of spectral characteristics of excitons in quantum wells on the resonant optical excitation power

Non-trivial dependence of spectral characteristics of excitons in quantum wells on the resonant optical excitation power

Нетривиальная Зависимость Спектральных Характеристик Экситонов В Квантовых Ямах От Мощности Резонансного Оптического Возбуждения

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