Lasing in Single Cadmium Sulfide Nanowire Optical Cavities

Details Lasing in Single Cadmium Sulfide Nanowire Optical Cavities Lasing in Single Cadmium Sulfide Nanowire Optical Cavities

2004-12-06

arxiv.org/abs/cond-mat/0412144v1

Physics

Condensed Matter

Materials Science

4 figures

Scientific paper

The mechanism of lasing in single cadmium sulfide (CdS) nanowire cavities was elucidated by temperature-dependent and time-resolved photoluminescence (PL) measurements. Temperature-dependent PL studies reveal rich spectral features and show that an exciton-exciton interaction is critical to lasing up to 75 K, while an exciton-phonon process dominates at higher temperatures. These measurements together with temperature and intensity dependent life-time and threshold studies suggest that lasing is due to formation of excitons, and moreover, have implications for the design of efficient, low-threshold nanowire lasers.

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