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Spin-resolved purcell effect in a quantum dot microcavity system

Ren, Q J; Lu, Jian; Wu, Shan; Sun, Liaoxin; Zhang, Weihang; Xie, Wei; Sun, Zheng; Zhu, Yonguyan; Jagadish, Chennupati; Shen, S C; Chen, Zhanghai H; Tan, Hark Hoe


We demonstrate the spin selective coupling of the exciton state with cavity mode in a single quantum dot (QD)-micropillar cavity system. By tuning an external magnetic field, each spin polarized exciton state can be selectively coupled with the cavity mode due to the Zeeman effect. A significant enhancement of spontaneous emission rate of each spin state is achieved, giving rise to a tunable circular polarization degree from -90% to 93%. A four-level rate equation model is developed, and it...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Nano Letters
DOI: 10.1021/nl3008083


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