周期含时refractive index介质的强双光子辐射
Strong two-photon emission by a medium with periodically time-dependent refractive index
摘要：
研究了周期性时变折射率介质的双光子辐射。这种发射是由介质的零点涨落引起的。通常，这种辐射非常微弱。然而，如果满足谐振条件$ω_0$ = 2.94 $c/l_0$（这里$ω_0$和$l_0 $分别是介质的光学长度的振荡的频率和振幅），则可以强烈地增强。此外，具有光程的谐振振荡的介质以高效率执行相位共轭反射。也预测了其他玻色子的双量子发射的类似共振增强。
英文摘要：
A two-photon emission of a medium with periodically time-dependent refractive index is considered. The emission results from the zero-point fluctuations of the medium. Usually this emission is very weak. However, it can be strongly enhanced if the resonant condition $ω_0$ = 2.94 $c/l_0$ is fulfilled (here $ω_0$ and $l_0 $ are the frequency and the amplitude of the oscillations of the optical length of the medium, respectively). Besides, a medium with resonant oscillations of the optical length performs the phase conjugated reflection with high efficiency. A similar resonant enhancement of the two-quantum emission of other bosons is also predicted.
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