High efficiency silicon nanodisk laser based on colloidal CdSe/ZnS QDs

INTRODUCTION: Using colloidal CdSe/ZnS quantum dots in the submicron-sized silicon disk cavity, we have developed a visible wavelength nanodisk laser that operates under extremely low threshold power at room temperature. METHODS: Time-resolved photoluminescence (PL) of QDs; nanodisk by e-beam lithog...

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Detalles Bibliográficos
Autores principales: Wang, Yao-Chen, Yuan, Chi-Tsu, Yang, Yi-Chun, Wu, Meng-Chyi, Tang, Jau, Shih, Min-Hsiung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: CoAction Publishing 2011
Materias:
Short Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3215198/
https://www.ncbi.nlm.nih.gov/pubmed/22110875
http://dx.doi.org/10.3402/nano.v2i0.7275
Descripción
Sumario:INTRODUCTION: Using colloidal CdSe/ZnS quantum dots in the submicron-sized silicon disk cavity, we have developed a visible wavelength nanodisk laser that operates under extremely low threshold power at room temperature. METHODS: Time-resolved photoluminescence (PL) of QDs; nanodisk by e-beam lithography. RESULTS: Observation of lasing action at 594 nm wavelength for quantum dots on a nanodisk (750 nm in diameter) cavity and an ultra-low threshold of 2.8 µW. CONCLUSION: From QD concentration dependence studies we achieved nearly sevenfold increase in spontaneous emission (SE) rate. We have achieved high efficient and high SE coupling rate in such a QD nanodisk laser.

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