Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 26, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3605599
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Funding
- National Natural Science Foundation of China [60736041, 10874238]
- National Key Basic Research Special Foundation of China [2007CB613205]
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We report on direct observation of amplified spontaneous emission (ASE) of surface plasmon polaritons (SPPs) at the interface of a silver film and a gain medium. Based on a typical Kretschmann configuration incorporated with Rhodamine 6G molecules, the growing ASE spectra of SPPs have been clearly identified by carefully conducting a pump-dependent angle-resolved spectral measurement. Spectral narrowing effects induced by the SPP amplification are also demonstrated. The observed phenomena are helpful in understanding the fundamental interactions between SPPs and gain medium, which could enable wide applications on plasmonic sources and sensors. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3605599]
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