標題: Lasing action and extraordinary reduction in long radiative lifetime of type-II GaSb/GaAs quantum dots using circular photonic crystal nanocavity
作者: Hsu, Kung-Shu
Hung, Wei-Chun
Chang, Chih-Chi
Lin, Wei-Hsun
Shih, Min-Hsiung
Lee, Po-Tsung
Lin, Shih-Yen
Chang, Shu-Wei
Chang, Yia-Chung
光電工程學系
Department of Photonics
公開日期: 31-Aug-2015
摘要: We demonstrated the lasing action and remarkable reduction in long radiative lifetimes of type-II GaSb/GaAs quantum dots using a circular photonic-crystal nano-cavity with high Purcell factors. The associated enhancement in carrier recombination was surprisingly high and could even surpass type-I counterparts in similar conditions. These phenomena reveal that the type-II sample exhibited extremely low nonradiative recombination so that weak radiative transitions were more dominant than expected. The results indicate that type-II nanostructures may be advantageous for applications which require controllable radiative transitions but low nonradiative depletions. (C) 2015 AIP Publishing LLC.
URI: http://dx.doi.org/10.1063/1.4929948
http://hdl.handle.net/11536/128310
ISSN: 0003-6951
DOI: 10.1063/1.4929948
期刊: APPLIED PHYSICS LETTERS
Volume: 107
Appears in Collections:Articles