Open AccessИсследование спонтанной эмиссии в брэгговских монослойных квантовых ямах InAs
Author(s) -
Galia Pozina,
М.А. Калитеевский,
Е.В. Никитина,
А.Р. Губайдуллин,
К.А. Иванов,
А.Ю. Егоров
Publication year - 2018
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2018.07.46044.8801
Subject(s) - photoluminescence , quantum well , spectral line , exciton , line (geometry) , bragg's law , materials science , condensed matter physics , ground state , excitation , enhanced data rates for gsm evolution , molecular physics , photoluminescence excitation , optics , physics , atomic physics , geometry , quantum mechanics , laser , diffraction , mathematics , computer science , telecommunications
The time-resolved photoluminescence of a Bragg structure formed by InAs single-layer quantum wells in a GaAs matrix is investigated experimentally. The comparison of photoluminescence spectra recorded from the edge and the surface of the sample indicates that Bragg ordering of the quantum wells leads to substantial modification of the spectra, in particular, to the appearance of additional modes. The spectrum recorded at the edge of the sample features a single line corresponding to the exciton ground state. In the spectrum recorded at the surface, an additional line whose frequency and propagation angle correspond to the Bragg condition for quantum wells, appears at high excitation levels. The calculation of the modal Purcell factor explains the fact that spontaneous emission is enhanced only for specific propagation angles and frequencies, rather than for all angles and frequencies satisfying the Bragg condition.