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arXiv quant-ph/9806072quant-phcond-mat.mes-hall
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随机介质的热辐射和放大自发发射

Thermal radiation and amplified spontaneous emission from a random medium

C. W. J. Beenakker

摘要:

我们计算系统的热辐射的统计,其中辐射散射混乱,通过相关的光计数分布的散射矩阵-其统计特性是已知的随机矩阵理论。我们发现,超泊松噪声是一个减少了自由度的黑体。一般的理论适用于一个无序的平板和混沌腔,并扩展到包括放大以及吸收系统。我们预言了随机激光器中放大的自发发射在激光阈值以下存在一个过量噪声。

英文摘要:

We compute the statistics of thermal emission from systems in which the radiation is scattered chaotically, by relating the photocount distribution to the scattering matrix - whose statistical properties are known from random-matrix theory. We find that the super-Poissonian noise is that of a black body with a reduced number of degrees of freedom. The general theory is applied to a disordered slab and to a chaotic cavity, and is extended to include amplifying as well as absorbing systems. We predict an excess noise of amplified spontaneous emission in a random laser below the laser threshold.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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