期刊
APPLIED PHYSICS LETTERS
卷 99, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3629814
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资金
- NSF [ECCS 1045621, CBET 1037097]
- Directorate For Engineering [1037097, 1045621] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys [1037097] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1045621] Funding Source: National Science Foundation
Optofluidic ring resonator lasers based on micro-bubbles filled with liquid gain medium are demonstrated. Due to the sub-micron wall thickness of the micro-bubble, significant amount of the electric field resides inside the liquid. Consequently, micro-bubbles mimic the droplets in air that have 3-dimensional optical confinement, extremely high Q-factors, and versatility in handling liquids of different refractive index. Furthermore, they enable repetitive interrogation and easy directional laser emission out-coupling without evaporation or size/shape variations. The laser using Rhodamine 6G in methanol is achieved with a threshold of 300 nJ/mm(2) and 5.3 mu J/mm(2) for 1 mM and 10 mu M in concentration, respectively. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3629814]
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