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Fine-Pitched Microgratings Encoded by Interference of UV Femtosecond Laser Pulses

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Abstract:

Fine-pitched microgratings are encoded on fused silica surfaces by a two-beam laser interference technique employing UV femtosecond pulses from the third harmonics of a Ti:sapphire laser. A pump and prove method utilizing a laser-induced optical Kerr effect or transient optical absorption change has been developed to achieve the time coincidence of the two pulses. Use of the UV pulses makes it possible to narrow the grating pitches to an opening as small as 290 nm, and the groove width of the gratings is of nanoscale size. The present technique provides a novel opportunity for the fabrication of periodic nanoscale structures in various materials.

Keywords: INTERFERENCE; KERR EFFECT; MICROGRATING; PERIODIC NANOSTRUCTURE; TRANSIENT ABSORPTION; UV FEMTOSECOND LASER

Document Type: Communications

DOI: http://dx.doi.org/10.1166/jnn.2002.120

Affiliations: 1: Hosono Transparent Electro-Active Materials Project, ERATO, Japan Science and Technology Corporation, KSP C-1232, Sakato 3-2-1, Takatsu-ku, Kawasaki 213-0012, Japan 2: Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama, Japan

Publication date: July 1, 2002

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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