Huang Zhong-Mei, Liu Shi-Rong, Peng Hong-Yan, Li Xin, Huang Wei-Qi
Institute of Nanophotonic Physics, Guizhou University, Guiyang, 550025, China.
State Key Laboratory of Environment Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550003, China.
Sci Rep. 2021 Apr 16;11(1):8388. doi: 10.1038/s41598-021-87629-6.
Some interesting phenomena have been observed in the laser reflecting Talbot magnification (LRTM) effect discovered at first, in which the high-order nonlinear imaging and the plasmonic structures imaging occur. The LRTM effect images were obtained on the 1D and 2D photonic crystals fabricated by using nanosecond pulsed laser etching on silicon surface, where the high-order nonlinear imaging on the 1D and 2D photonic crystals was observed interestingly. The theory result is consistent with the experimental one, which exhibits that the suitable wave-front shape of injection beam selected in optical route can effectively enlarge the magnification rate and elevate the resolution of the Talbot image. Especially the periodic plasmonic structures on silicon surface have been observed in the LRTM effect images, which have a good application in the online detection of pulsed laser etching process. The temporary reflecting Talbot images exhibit that the electrons following with photonic frequency float on plasma surface to form electronic crystal observed on silicon at first, which is similar with the Wigner crystal structure.
在最初发现的激光反射塔尔博特放大（LRTM）效应中观察到了一些有趣的现象，其中会出现高阶非线性成像和等离子体结构成像。通过在硅表面使用纳秒脉冲激光蚀刻制备的一维和二维光子晶体上获得了LRTM效应图像，有趣的是在这些一维和二维光子晶体上观察到了高阶非线性成像。理论结果与实验结果一致，这表明在光路中选择合适的注入光束波前形状可以有效地提高放大率并提升塔尔博特图像的分辨率。特别是在LRTM效应图像中观察到了硅表面的周期性等离子体结构，其在脉冲激光蚀刻过程的在线检测中具有良好的应用。瞬态反射塔尔博特图像表明，跟随光子频率的电子首先在等离子体表面漂浮，从而在硅上形成电子晶体，这与维格纳晶体结构相似。
