Optical gain and saturation of photoexcited type-II superlattice

Autor:	Yair Dankner
Rok vydání:	1995
Předmět:	Photoluminescence Chemistry Superlattice Materials Chemistry Radiative transfer General Chemistry Stimulated emission Atomic physics Condensed Matter Physics Saturation (chemistry) Spectral line Quantum well Excitation
Zdroj:	Solid State Communications. 93:707-712
ISSN:	0038-1098
DOI:	10.1016/0038-1098(94)00725-x
Popis:	The stimulated emission spectra of photoexcited type-II superlattice was measured at room temperature, 77 and 1.8 K as a function of the illuminated stripe length and excitation intensity. Based on these data, the gain spectra and gain saturation behavior were obtained using Agrawal's model for the analysis. Both the spontaneous photoluminescence spectra and the stimulated emission spectra were used in order to analyze the spectral shifts. We used the Kronig-Penney model to approximate the energy level diagram of the samples. We report here for the first time about: (i) a pronounced gain which is a result of X-type radiative recombinations, (ii) a red-shifted emission under CW excitation at all temperatures and (iii) a strong signal gain saturation as a function of temperature and pumping-power.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::30b43c2478f0d3be6ca725acf4dbe05d https://doi.org/10.1016/0038-1098(94)00725-x Zobrazit plný text záznamu Full Text from ScienceDirect