title: Imbalanced initial populations between dark and bright states in semiconductor quantum dots.
abstract: We present the observation and analysis of long-lived exciton in individual InAs quantum dots (QDs). The general model considering the interplay between dark and bright states reveals the two key factors responsible for the long decay time: the shortened spin-flip time at elevated temperature and the imbalanced initial populations between the dark and bright states. The later one plays a key role in the unusual phenomena and leads to the possibility of spin-dependent relaxation process in QDs.
authors.affiliation: Department of Electronics Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 300, Taiwan. sdlin@mail.nctu.edu.tw
authors.forename: Sheng-Di
authors.initials: SD
authors.lastname: Lin
authors.forename: Ying-Jhe
authors.initials: YJ
authors.lastname: Fu
authors.forename: Chun
authors.initials: C
authors.lastname: Cheng
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D045663:Quantum Dots; D012542:Scattering, Radiation; D012666:Semiconductors