Controllable grating fabrication by three interfering replicas of single femtosecond laser pulse

• Published in: Chinese physics B Vol. 18; no. 12; pp. 5331 - 5335
• Main Author: 韩艳华 曲士良 王强 郭忠义 陈相君
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.12.2009
• Subjects: Atomic force microscopy; Beams (radiation); Control surfaces; Diffraction gratings; Femtosecond; Femtosecond pulses; Gratings (spectra); Grooves; Lasers; Modulation; Optical microscopy; Periodic structures; Silica glass; Simulation; Stability; 三光束干涉; 光学显微镜; 原子力显微镜; 复制品; 飞秒激光脉冲
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/18/12/035

The controllable periodic M-shape gratings are fabricated on the surface of silica glass by three coplanar interfering beams from a single femtosecond pulse. The configuration of the M-shape periodic structure is characterized by optical microscopy and atomic force microscopy. The experimental results and the theoretical simulation show that the period and the modulation depth ratio between the neighboring grooves of the fabricated gratings can be controlled by adjusting the collision angles and pulse energy of the three beams, respectively.