Laser action in strongly scattering media
Laser action in strongly scattering media
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DOI：
10.1038/369340b0
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发表时间：
1994-05
期刊：
影响因子：
64.8
通讯作者：
N. Lawandy;R. Balachandran;A. Gomes;E. Sauvain
中科院分区：
文献类型：
--
作者：
N. Lawandy;R. Balachandran;A. Gomes;E. Sauvain
在相干光散射的存在下，原子或分子系统的辐射特性可能会发生显著的改变。在研究分散在强散射介质（二氧化钛颗粒的胶体悬浮液）中的激光染料的辐射特性的过程中，我们发现，即使系统不包含外腔，这种系统的发射也可以表现出多模激光振荡器的光谱和时间特性。激光作用的阈值激发能低得惊人。我们认为，这些复合系统可能会发现在激光仪器和光子学的应用。
THE radiative properties of an atomic or molecular system may be altered significantly in the presence of coherent optical scattering1,2. In the course of investigating the radiative properties of a laser dye dispersed in a strongly scattering medium (a colloidal suspension of titanium dioxide particles), we have found that the emissions from such systems can exhibit spectral and temporal properties characteristic of a multimode laser oscillator, even though the systems contain no external cavity. The threshold excitation energy for laser action is surprisingly low. We suggest that these composite systems might find applications in laser instrumentation and photonics.