Title: Femtosecond laser induced photoluminescence in poly(methyl methacrylate) and three-dimensional optical storage
Authors: Nie, Zhaogang
Lim, Ki-Soo
Lee, Heungyeol
Lee, Myeongkyu
Kabayashi, Takayoshi
Department of Electrophysics
Keywords: Three dimensional optical storage;Poly(methyl methacrylate);Femtosecond pulsed laser;Photoluminescence
Issue Date: 1-Feb-2011
Abstract: We report on a femtosecond-laser induced photoluminescence (PL) in poly(methyl methacrylate) and its potential application to three-dimensional optical storage Irradiation with a focused 800 nm 1 kHz 100 fs pulsed laser induced a strong PL change in UV-visible region Absorption spectra and Fourier-transform Infrared spectra before and after laser irradiation indicate the PL may result from the emissive oxidized products of photo-degradation reaction of PMMA This makes it possible to read out the stored data by detecting the PL change The pulse energy threshold of the light-induced PL change of PMMA is found to be at similar to 2 mu J/pulse and the optimal recording energy is similar to 3 mu J/pulse A ten-layer pattern inside the bulk sample recorded by tightly focusing a pulsed laser beam was read out by a reflection-type fluorescent confocal microscope which detected the emission in visible range as the signal High-contract fluorescent images with a much higher signal-to-noise ratio were obtained without crosstalk in comparison with the ordinary reflection mode (C) 2010 Elsevier B V All rights reserved
URI: http://dx.doi.org/10.1016/j.jlumin.2010.10.009
ISSN: 0022-2313
DOI: 10.1016/j.jlumin.2010.10.009
Volume: 131
Issue: 2
Begin Page: 266
End Page: 270
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