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Holographic Grating Formed by Photochemical Phase Transition of Polymer Azobenzene Liquid Crystal

Published online by Cambridge University Press:  10 February 2011

T. Yamamoto ,
S. Yoneyama ,
M. Hasegawa ,
A. Kanazawa ,
T. Shiono  and
T. Ikeda
T. Yamamoto
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, JAPAN, E-mail: [email protected]; URL: http://wwwxes.titech.ac.jp/polymer
S. Yoneyama
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, JAPAN, E-mail: [email protected]; URL: http://wwwxes.titech.ac.jp/polymer
M. Hasegawa
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, JAPAN, E-mail: [email protected]; URL: http://wwwxes.titech.ac.jp/polymer
A. Kanazawa
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, JAPAN, E-mail: [email protected]; URL: http://wwwxes.titech.ac.jp/polymer
T. Shiono
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, JAPAN, E-mail: [email protected]; URL: http://wwwxes.titech.ac.jp/polymer
T. Ikeda
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, JAPAN, E-mail: [email protected]; URL: http://wwwxes.titech.ac.jp/polymer
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Abstract

We explored the formation of holographic gratings by means of a polymer azobenzene liquid crystal (PALC). When two writing beams (argon-ion laser, 488 nm, unpolarized) were interfered on the surface of the PALC film (thickness, 500 ∼ 600 nm), multiple diffraction beams were observed immediately, resulting from grating formation. Such generation of the diffraction beams was assumed to be due to a periodic induction of photochemical phase transition in the bright fringes of the interference pattern. The grating is namely made up of a periodic arrangement of nematic (N, dark fringes) and isotropic (I, bright fringes) phases. Observation of recorded interference patterns under a cross-polarized optical microscope supported our speculation for the structure of the grating. On the basis of these results, we succeeded in recording an image hologram of a photomask as an object.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 559: Symposium D – Liquid Crystals Materials and Devices , 1999 , 153
Copyright
Copyright © Materials Research Society 1999

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References

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