Enhancement of band gap emission stimulated by defect loss

H. Y. Lin; C. L. Cheng; Y. Y. Chou; L. L. Huang; Y. F. Chen; Kong-Thon Tsen

doi:10.1364/OE.14.002372

Enhancement of band gap emission stimulated by defect loss

H. Y. Lin, C. L. Cheng, Y. Y. Chou, L. L. Huang, Y. F. Chen, Kong-Thon Tsen

Physics

Research output: Contribution to journal › Article › peer-review

163 Scopus citations

Abstract

Defect radiation has been always considered as the most important loss for an emitter based on band gap emission. Here, we propose a novel approach which goes against this conventional wisdom. Based on the resonance effect between the surface plasmon of metal nanoparticles and defect emission, it is possible to convert the useless defect radiation to the useful excitonic emission with a giant enhancement factor. Through the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of the emitter, the band gap emission can be greatly enhanced, while the defect emission can be suppressed to noise level.

Original language	English (US)
Pages (from-to)	2372-2379
Number of pages	8
Journal	Optics Express
Volume	14
Issue number	6
DOIs	https://doi.org/10.1364/OE.14.002372
State	Published - Mar 2006

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.14.002372

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AB - Defect radiation has been always considered as the most important loss for an emitter based on band gap emission. Here, we propose a novel approach which goes against this conventional wisdom. Based on the resonance effect between the surface plasmon of metal nanoparticles and defect emission, it is possible to convert the useless defect radiation to the useful excitonic emission with a giant enhancement factor. Through the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of the emitter, the band gap emission can be greatly enhanced, while the defect emission can be suppressed to noise level.

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Enhancement of band gap emission stimulated by defect loss

Abstract

ASJC Scopus subject areas

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