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arXiv 1104.0158physics.opticsquant-ph
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含慢光介质腔中的光子寿命

Photon lifetime in a cavity containing a slow-light medium

Thomas Lauprêtre, Cédric Proux, Rupamanjari Ghosh, Sylvain Schwartz, Fabienne Goldfarb, Fabien Bretenaker

摘要:

我们在实验上研究了光子在含有强正色散介质的腔中的寿命。这种腔内正色散是由亚稳态氦气在室温下的电磁感应透明(EIT)制度,其中光传播的群速度的数量级为10000米/秒。结果明确地证明了腔光子的寿命是由光在腔中的群速度决定的,而不是由光的相速度决定的。

英文摘要:

We investigate experimentally the lifetime of the photons in a cavity containing a medium exhibiting strong positive dispersion. This intracavity positive dispersion is provided by a metastable helium gas at room temperature in the electromagnetically induced transparency (EIT) regime, in which light propagates at a group velocity of the order of 10000 m/s. The results definitely prove that the lifetime of the cavity photons is governed by the group velocity of light in the cavity, and not its phase velocity.

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