Subwavelength ripple formation on planar and nonplanar surfaces by femtosecond laser scanning  

作　　者：宋海英 张艳杰 董祥明 刘世炳 

机构地区：[1]Strong-Field and Ultrafast Photonics Lab, Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China

出　　处：《Chinese Optics Letters》2016年第12期146-150,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.51275012

摘　　要：The self-formation of periodic subwavelength ripples by linear polarized femtosecond laser scanning planar and non-planar tungsten targets on the employed laser wavelength, scanning speed, and energy fluence are examined systematically. The results show that, for a certain laser wavelength, the scanning conditions have no obvious effect to the morphological features of grating structures in the threshold range of laser fluence. The spatial structured period of gratings can be self-consistently interpreted by recently presented physical model of surface two-plasmon resonance. The subwavelength structures on cylindrical surface would be a good method to realize unique surface functions on complex surface of micro-devices.The self-formation of periodic subwavelength ripples by linear polarized femtosecond laser scanning planar and non-planar tungsten targets on the employed laser wavelength, scanning speed, and energy fluence are examined systematically. The results show that, for a certain laser wavelength, the scanning conditions have no obvious effect to the morphological features of grating structures in the threshold range of laser fluence. The spatial structured period of gratings can be self-consistently interpreted by recently presented physical model of surface two-plasmon resonance. The subwavelength structures on cylindrical surface would be a good method to realize unique surface functions on complex surface of micro-devices.

关 键 词：planar systematically consistently grating ripple tungsten plasmon structuring polarized structured 

分 类 号：TN24[电子电信—物理电子学] TN25