期刊
NANO LETTERS
卷 17, 期 1, 页码 91-96出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b03499
关键词
Organic nanomaterial; organic microlaser; laser switch; WGM laser; nanophotonic material
类别
资金
- National Natural Science Foundation of China [21533013, 21521062]
- Ministry of Science and Technology of China
- Chinese Academy of Sciences [XDB12020300]
Wavelength switchable micro/nanoscale laser is essential to construct various ultracompact photonic devices. However, traditional semiconductors as the gain-Media generally provide only monochromatic laser output chip to their continuous energy band structures. For luminescent conjugated molecules, the broad emission band usually contains a,series of vibronic peaks, which is very helpful for extending the lasing spectrum to several different wavelengths. Here we propose a novel strategy to realize wavelength switchable lasers based on the controlled competition of dual wavelength vibronic lasing in single-component organic microcrystals. The vibrationally structured fluorescence property of the single-crystal organic microdisks brings dual-wavelength lasing at different vibronic bands. Their relative optical gain intensity was modulated by controlling the population on the certain vibronic level of the ground state with varied temperature, which consequently enabled the reversible switching of the dual-wavelength vibronic lasing. The results point out a promising route to the rational design of miniaturized lasers and,other photonic elements with desired performances.
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