期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms5356
关键词
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资金
- National Institutes of Health [R21EB011703]
- National Science Foundation [ECCS-1250360, DBI-1250361, CBET-1250363]
- Student Research Participation Program at Air Force Research Laboratory
- 711th Human Performance Wing, Human Effectiveness Directorate, Bioeffects Division
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1250363] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1250360] Funding Source: National Science Foundation
Random lasers are a developing class of light sources that utilize a highly disordered gain medium as opposed to a conventional optical cavity. Although traditional random lasers often have a relatively broad emission spectrum, a random laser that utilizes vibration transitions via Raman scattering allows for an extremely narrow bandwidth, on the order of 10 cm(-1). Here we demonstrate the first experimental evidence of lasing via a Raman interaction in a bulk three-dimensional random medium, with conversion efficiencies on the order of a few percent. Furthermore, Monte Carlo simulations are used to study the complex spatial and temporal dynamics of nonlinear processes in turbid media. In addition to providing a large signal, characteristic of the Raman medium, the random Raman laser offers us an entirely new tool for studying the dynamics of gain in a turbid medium.
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