title: ÐÐ¿ÑÐ¸ÑÐµÑÐºÐ°Ñ ÑÐ¿ÐµÐºÑÑÐ¾ÑÐºÐ¾Ð¿Ð¸Ñ ÑÐµÐ·Ð¾Ð½Ð°Ð½ÑÐ½ÑÑ Ð±ÑÑÐ³Ð³Ð¾Ð²ÑÐºÐ¸Ñ ÑÑÑÑÐºÑÑÑ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¸Ð· 100 ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÑ ÑÐ¼ InGaN
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Optical spectroscopy of resonant Bragg structures based on a system of 100 InGaN quantum wells
Creators: name: ÐÐ²Ð°Ð½Ð¾Ð², ÐÐ»ÐµÐºÑÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: Ð¿Ð¾Ð»ÑÐ¿ÑÐ¾Ð²Ð¾Ð´Ð½Ð¸ÐºÐ¾Ð²ÑÐµ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ñ
ÑÐµÐ·Ð¾Ð½Ð°Ð½ÑÐ½ÑÐµ Ð±ÑÑÐ³Ð³Ð¾Ð²ÑÐºÐ¸Ðµ ÑÑÑÑÐºÑÑÑÑ
ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÐµ ÑÐ¼Ñ
ÑÐºÑÐ¸ÑÐ¾Ð½
ÑÐºÑÐ¸ÑÐ¾Ð½-Ð¿Ð¾Ð»ÑÑÐ¸ÑÐ¾Ð½Ñ
ÑÐ²ÐµÑÑ Ð¸Ð·Ð»ÑÑÐ°ÑÐµÐ»ÑÐ½Ð°Ñ Ð¼Ð¾Ð´Ð°
semiconductor materials
resonant bragg structures
quantum wells
exciton
exciton-polaritons
super-radiant mode

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸Ð·ÑÑÐµÐ½Ð¸Ñ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ²Ð¾Ð¹ÑÑÐ² Ð¾Ð±ÑÐ°Ð·ÑÐ° Ð¸Ð· 100 ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÑ ÑÐ¼ InGaN, ÑÐ°ÑÐ¿Ð¾Ð»Ð¾Ð¶ÐµÐ½Ð½ÑÑ Ð² Ð¿ÐµÑÐ¸Ð¾Ð´Ð¸ÑÐµÑÐºÐ¾Ð¹ Ð¿Ð¾ÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¸ ÑÐ°Ð·Ð´ÐµÐ»ÐµÐ½Ð½ÑÑ Ð±Ð°ÑÑÐµÑÐ°Ð¼Ð¸ GaN, ÑÐ°Ðº ÑÑÐ¾ Ð±ÑÑÐ³Ð³Ð¾Ð²ÑÐºÐ¸Ð¹ ÑÐµÐ·Ð¾Ð½Ð°Ð½Ñ ÑÐ»ÐµÐºÑÑÐ¾Ð¼Ð°Ð³Ð½Ð¸ÑÐ½ÑÑ Ð²Ð¾Ð»Ð½ Ð¼Ð¾Ð³ Ð±ÑÑÑ ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½ Ð½Ð° ÑÐ°ÑÑÐ¾ÑÐµ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð² Ð² ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÑ ÑÐ¼Ð°Ñ.
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description: The given work is devoted to studying the optical properties of the sample with of 100 InGaN quantum wells arranged in a periodic sequence and separated by GaN barriers, so that the Bragg resonance of the electromagnetic waves could be achieved at the frequency of the quantum wells excitons.
The optical reflectance and transmittance spectra of the periodic InGaN semiconductor heterostructure with 100 quantum wells are studied at room temperature. Numerical modeling with a single determined set of parameters gave a quantitatively accurate fit of the experimental reflection and transmission spectra in a wide wavelength range and various angles of the light inci-dence with both linear polarizations. The radiative decay parameter is determined to be (0.25Â±0.02) meV and the nonradiative decay parameter is 40 meV. The effect of large values of the nonradiative decay parameter of the exciton and the deviation of the thickness from the strict periodicity on the reflection spectrum is revealed.
By tuning the optical Bragg resonance of the quantum wells system to the frequency of the excitons, we show a substantial enhancement of the resonant optical reflection, which indicates the formation of a super-radiant mode. A good agreement is found between the experimental spectra and quantitative theoretical calculations, which proves the dominant role of the excitons in the resonant optical reflection. It can be concluded that the excitons in the InGaN/GaN resonant Bragg structures are well suitable for room temperature operations.