期刊
NATURE PHOTONICS
卷 5, 期 10, 页码 615-617出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2011.217
关键词
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资金
- ERC [201766]
- CINECA
- EU [248855]
- Spanish MICINN [CSD2007 0046]
- Comunidad de Madrid [S2009/MAT-1756 (PHAMA)]
- [MAT2009-07841 (GLUSFA)]
- European Research Council (ERC) [201766] Funding Source: European Research Council (ERC)
The discovery of the spontaneous mode-locking of lasers(1,2), that is, the self-starting synchronous oscillation of electromagnetic modes in a cavity, has been a milestone of photonics allowing the realization of oscillators delivering ultrashort pulses. This process is so far known to occur only in standard ordered lasers and only in the presence of a specific device (the saturable absorber). We engineer a mode-selective pumping of a random laser formed by a self-assembled cluster of nanometric particles. We show that the random laser can be continuously driven from a configuration exhibiting weakly interacting electromagnetic resonances(4,5) to a regime of collectively oscillating strongly interacting modes(6,7). This phenomenon, which opens the way to the development of a new generation of miniaturized and all-optically controlled light sources, may be explained as the first evidence of spontaneous mode-locking in disordered resonators.
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