Effect of saturable response to two-photon absorption on the readout signal level of three-dimensional bit optical data storage in a photochromic polymer

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Title: Effect of saturable response to two-photon absorption on the readout signal level of three-dimensional bit optical data storage in a photochromic polymer
Author(s): Gu, Min; Amistoso, Jose Omar; Toriumi, Akiko; Irie, Masahiro; Kawata, Satoshi
Abstract: We observe a saturable change in the refractive index induced by two-photon absorption in a photochromic polymer, while the erasable nature of the polymer is maintained. As a result, the support region of spatial frequencies of the recorded data bits caused by the refractive index change in the polymer is enlarged. This feature leads to the significant enhancement of the signal level in a reflection confocal microscope readout system for three-dimensional photochromic bit optical data storage.
Publication type: Journal article
Research centre: Swinburne University of Technology. School of Biophysical Science and Electrical Engineering. Centre for Micro-Photonics
Source: Applied physics letters, Vol. 79, no. 2 (July 2001), pp. 148-150
Publication year: 2001
Keyword(s): Photochromism; Optical storage; Optical polymers; Optical saturable absorption; Optical microscopy; Refractive index; Two-photon processes; Polymer films
Publisher: American Institute of Physics
Format: pp. 148-150
ISSN: 0003-6951
Publisher URL: Applied physics letters
Publisher URL: http://dx.doi.org/10.1063/1.1383999
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