Journal
ACS NANO
Volume 9, Issue 4, Pages 3978-3983Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b01643
Keywords
nanolaser; surface plasmon; ZnO; nanowire; silver
Categories
Funding
- Ministry of Education Aim for the Top University Program
- [NSC100-2628-E009-013-MY3]
- [NSC102-2221-E-019-050]
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Nano lasers with an ultracompact footprint can provide high-intensity coherent light, which can be potentially applied to high-capacity signal processing, biosensing, and subwavelength imaging. Among various nanolasers, those with cavities surrounded by metals have been shown to have superior light emission properties because of the surface plasmon effect that provides enhanced field confinement capability and enables exotic light matter interaction. In this study, we demonstrated a robust ultraviolet ZnO nanolaser that can operate at room temperature by using silver to dramatically shrink the mode volume. The nanolaser shows several distinct features including an extremely small mode volume, a large Purcell factor, and a slow group velocity, which ensures strong interaction with the exciton in the nanowire.
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