期刊
NANO LETTERS
卷 15, 期 5, 页码 2951-2957出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl5047973
关键词
plasmonic; nanoantanna; linear polarization; luminescence
类别
资金
- National Basic Research Program of China [2013CB328702, 2010CB934101]
- National Natural Science Foundation of China [11304162]
- 111 Project [B07013]
- PCSIRT [IRT0149]
- SRFDP [20130031120005]
- China Postdoctoral Science Foundation [2013M530038]
- Fundamental Research Funds for the Central Universities
Polarizers provide convenience in generating polarized light, meanwhile their adoption raises :problems of extra weight, cost, and energy loss. Aiming to realize polarizer-free polarized light sources, herein, We present a plasmonic approach to achieve direct generation of linearly polarized optical waves at the nanometer scale. Periodic slot nanoantenna arrays are fabricated, which are driven by the transition dipole moments of luminescent semiconductor quantum dots. By harnessing interactions between quantum dots and scattered fields from the nanoantennas, spontaneous emission with a high degree of linear polarization is achieved from such hybrid:,antenna system with polarization perpendicular to antenna Slot. We also demonstrate that the polarization is engineerable in aspects of both spectrum and magnitude by tailoring plasmonic resonance of the antenna arrays: Our findings will establish a basis for the development of innovative polarized light-emitting devices, which are useful in optical displays, spectroscopic techniques, optical telecommunications, and So forth.
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