Carrier Hopping and Relaxation in InAs/GaAs Quantum Dot Heterostructures

Autor:	Jiunn Chyi Lee, Ya Fen Wu
Rok vydání:	2014
Předmět:	Condensed Matter::Materials Science Photoluminescence Materials science Condensed matter physics Quantum dot Quantum dot laser Thermal General Engineering Heterojunction Rate equation Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Carrier dynamics Spectral line
Zdroj:	Advanced Materials Research. :9-13
ISSN:	1662-8985
DOI:	10.4028/www.scientific.net/amr.875-877.9
Popis:	We investigate the effect of carrier dynamics on the temperature dependence of photoluminescence spectra from InAs/GaAs quantum dot heterostructures with different dot size uniformity. Intersublevel relaxation lifetimes and carrier transferring mechanisms are simulated using a model based on carriers relaxing and thermal emission of each discrete energy level in the quantum dot system. Calculated relaxation lifetimes are decreasing with temperature and have larger values for sample with lower dot size uniformity. In the quantitative discussion of carrier dynamics, the influence of thermal redistribution on carriers relaxing process of quantum dot system is demonstrated by our model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::835090f95f84934c89cafcabd84d0b36 https://doi.org/10.4028/www.scientific.net/amr.875-877.9 Zobrazit plný text záznamu