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arXiv 2002.10041physics.optics
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光热诱导透明

Photothermally Induced Transparency

Jinyong Ma, Jiayi Qin, Geoff T. Campbell, Ruvi Lecamwasam, Kabilan Sripathy, Joe Hope, Ben C. Buchler, Ping Koy Lam

摘要:

诱导透明是光学中一种常见而又显著的效应。当使用强驱动场使原本不透明的材料变得透明时,就会发生这种情况。这种效应被称为原子介质中的电磁感应透明和由耦合的光学和机械谐振器组成的系统中的光机械感应透明。在这项工作中,我们介绍了光热诱导透明(PTIT)的概念。当光学谐振器由于谐振器或其反射镜的光学加热而表现出非线性行为时,就会发生这种情况。类似于诱导透明的既定机制,PTIT可以抑制光学谐振腔和行进光场之间的耦合。我们进一步表明,可以修改的谐振腔的色散表现出慢光或快光。由于相对慢的热响应,我们观察到PTIT的带宽为$2π\times15.9$ Hz,这在理论上表明群速度低至$5$ m/s。

英文摘要:

Induced transparency is a common but remarkable effect in optics. It occurs when a strong driving field is used to render an otherwise opaque material transparent. The effect is known as electromagnetically induced transparency in atomic media and optomechanically induced transparency in systems that consist of coupled optical and mechanical resonators. In this work, we introduce the concept of photothermally induced transparency (PTIT). It happens when an optical resonator exhibits non-linear behavior due to optical heating of the resonator or its mirrors. Similar to the established mechanisms for induced transparency, PTIT can suppress the coupling between an optical resonator and a traveling optical field. We further show that the dispersion of the resonator can be modified to exhibit slow or fast light. Because of the relatively slow thermal response, we observe the bandwidth of the PTIT to be $2π\times15.9$ Hz which theoretically suggests a group velocity of as low as $5$ m/s.

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