Mazaheri Leila, Bobbara Sanyasi Rao, Lebel Olivier, Nunzi Jean-Michel
Opt Lett. 2016 Jul 1;41(13):2958-61. doi: 10.1364/OL.41.002958.
Surface relief gratings were spontaneously photoinduced from a collimated Nd:YAG laser beam at 532 nm on thin films of a disperse red 1 functionalized glass-forming compound. Pattern formation was studied by measuring the diffraction intensity of a He-Ne laser probe beam at 633 nm and by atomic force microscopy (AFM). The dependence of pattern formation on both irradiation time and intensity was studied. The gratings could be erased both optically and thermally. The orientation of the gratings is influenced by the polarization of the writing beam, and it is accompanied by strong diffraction of the incident light into the sample plane, thereby providing a way to couple and trap the light into the substrate. Interestingly, photobleaching upon prolonged irradiation yields transparent gratings, and the process is partially reversible upon thermal erasure.
在分散红1功能化玻璃形成化合物的薄膜上，用532nm的准直Nd:YAG激光束自发光诱导出表面起伏光栅。通过测量633nm的氦氖激光探测束的衍射强度和原子力显微镜（AFM）研究了图案形成。研究了图案形成对辐照时间和强度的依赖性。光栅可以通过光学和热学方法擦除。光栅的取向受写入光束偏振的影响，并且伴随着入射光向样品平面的强烈衍射，从而提供了一种将光耦合并捕获到衬底中的方法。有趣的是，长时间辐照后的光漂白产生透明光栅，并且该过程在热擦除时部分可逆。
