Anomalous circular polarization of magneto-photoluminescence from individual CdSe nanocrystals

Autor:	Htoon, H., Crooker, S. A., Furis, M., Jeong, S., Efros, Al. L., Klimov, V. I.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Physical Review Letters 102, 017402 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.102.017402
Popis:	We study the low-temperature magneto-photoluminescence (PL) from individual CdSe nanocrystals. Nanocrystals having a small "bright" exciton fine structure splitting ($<$0.5 meV) exhibit a conventional left- and right-circularly polarized Zeeman PL doublet in applied magnetic fields. In contrast, nanocrystals with large fine structure splitting ($>$1 meV) show an anomalous magneto-PL polarization, wherein the lower-energy peak becomes circularly polarized with increasing field, while the higher-energy peak remains linearly polarized. This unusual behavior arises from strong mixing between the absorbing and emitting bright exciton levels due to strong anisotropic exchange interactions. Comment: 15 pages, 3 figures; submitted
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0809.1116 Zobrazit plný text záznamu View this record from Arxiv