Hane K, Suzuki K
Appl Opt. 1997 Jul 20;36(21):5006-9. doi: 10.1364/ao.36.005006.
We report on the bistability of a self-standing thin film caused by photothermal displacement. The sample consisted of a self-standing thin film placed in front of a mirror. By irradiating the self-standing thin film with continuous wave laser light, the self-standing thin film deflected with thermoelastic bending moment. Since a standing wave of the laser light was generated by the reflection of the mirror, the bending moment generated on the film was periodic along the optical axis. The displacement of the film was found to be bistable with the laser light intensity. Simultaneously, the light intensity reflected from the sample was also bistable. These phenomena are explained by the photothermal displacement of thin film in the standing wave of laser light.
我们报道了由光热位移引起的自支撑薄膜的双稳性。样品由放置在镜子前的自支撑薄膜组成。通过用连续波激光照射自支撑薄膜，自支撑薄膜因热弹性弯矩而发生偏转。由于镜子的反射产生了激光驻波，薄膜上产生的弯矩沿光轴呈周期性变化。发现薄膜的位移随激光强度呈双稳性。同时，从样品反射的光强也呈双稳性。这些现象用光热位移在激光驻波中的作用来解释。
