Highly efficient formation of holographic gratings in polymer liquid crystals

Kunihiko Okano, Atsushi Shishido, Osamu Tsutsumi, Takeshi Shiono, Tomiki Ikeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We studied the formation of gratings by means of the photoinduced alignment change of polymer liquid crystals (PLCs) in a glassy state. To obtain high diffraction efficiency (η), we prepared a novel PLC containing an azobenzene group directly connected with a tolane moiety (3AT) which has large birefringence (Δn). It was found that the value of birefringence in 3AT was extremely high (Δn = 0.39). When two s-polarized writing beams (Ar+ laser, 488 nm) were interfered on the surface of the 3AT film in the glassy state, multiple diffraction beams were observed immediately, resulting from the grating formation. We explored the effect of light intensity on the grating formation and the relation between the alignment change and η. The value of η showed a maximum when the change in photoinduced alignment was almost completed. Furthermore the value of η was relatively high (η = 20%) even though the alignment change of mesogens was small.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsI.-C. Khoo
Pages139-146
Number of pages8
Volume5213
Publication statusPublished - 2004
EventLiquid Crystals VII - San Diego, CA, United States
Duration: 2003 Aug 52003 Aug 7

Other

OtherLiquid Crystals VII
CountryUnited States
CitySan Diego, CA
Period03/8/503/8/7

Fingerprint

Holographic gratings
Liquid crystal polymers
liquid crystals
alignment
gratings
polymers
Birefringence
birefringence
Azobenzene
Diffraction efficiency
diffraction
luminous intensity
Laser beams
Diffraction
laser beams

Keywords

  • Azobenzene
  • Holographic grating
  • Polymer liquid crystal
  • Tolane

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Okano, K., Shishido, A., Tsutsumi, O., Shiono, T., & Ikeda, T. (2004). Highly efficient formation of holographic gratings in polymer liquid crystals. In I-C. Khoo (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5213, pp. 139-146)

Highly efficient formation of holographic gratings in polymer liquid crystals. / Okano, Kunihiko; Shishido, Atsushi; Tsutsumi, Osamu; Shiono, Takeshi; Ikeda, Tomiki.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / I.-C. Khoo. Vol. 5213 2004. p. 139-146.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Okano, K, Shishido, A, Tsutsumi, O, Shiono, T & Ikeda, T 2004, Highly efficient formation of holographic gratings in polymer liquid crystals. in I-C Khoo (ed.), Proceedings of SPIE - The International Society for Optical Engineering. vol. 5213, pp. 139-146, Liquid Crystals VII, San Diego, CA, United States, 03/8/5.
Okano K, Shishido A, Tsutsumi O, Shiono T, Ikeda T. Highly efficient formation of holographic gratings in polymer liquid crystals. In Khoo I-C, editor, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 5213. 2004. p. 139-146
Okano, Kunihiko ; Shishido, Atsushi ; Tsutsumi, Osamu ; Shiono, Takeshi ; Ikeda, Tomiki. / Highly efficient formation of holographic gratings in polymer liquid crystals. Proceedings of SPIE - The International Society for Optical Engineering. editor / I.-C. Khoo. Vol. 5213 2004. pp. 139-146
@inproceedings{aa11838184f44397bcad8a1d3bfbb452,
title = "Highly efficient formation of holographic gratings in polymer liquid crystals",
abstract = "We studied the formation of gratings by means of the photoinduced alignment change of polymer liquid crystals (PLCs) in a glassy state. To obtain high diffraction efficiency (η), we prepared a novel PLC containing an azobenzene group directly connected with a tolane moiety (3AT) which has large birefringence (Δn). It was found that the value of birefringence in 3AT was extremely high (Δn = 0.39). When two s-polarized writing beams (Ar+ laser, 488 nm) were interfered on the surface of the 3AT film in the glassy state, multiple diffraction beams were observed immediately, resulting from the grating formation. We explored the effect of light intensity on the grating formation and the relation between the alignment change and η. The value of η showed a maximum when the change in photoinduced alignment was almost completed. Furthermore the value of η was relatively high (η = 20{\%}) even though the alignment change of mesogens was small.",
keywords = "Azobenzene, Holographic grating, Polymer liquid crystal, Tolane",
author = "Kunihiko Okano and Atsushi Shishido and Osamu Tsutsumi and Takeshi Shiono and Tomiki Ikeda",
year = "2004",
language = "English",
volume = "5213",
pages = "139--146",
editor = "I.-C. Khoo",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - Highly efficient formation of holographic gratings in polymer liquid crystals

AU - Okano, Kunihiko

AU - Shishido, Atsushi

AU - Tsutsumi, Osamu

AU - Shiono, Takeshi

AU - Ikeda, Tomiki

PY - 2004

Y1 - 2004

N2 - We studied the formation of gratings by means of the photoinduced alignment change of polymer liquid crystals (PLCs) in a glassy state. To obtain high diffraction efficiency (η), we prepared a novel PLC containing an azobenzene group directly connected with a tolane moiety (3AT) which has large birefringence (Δn). It was found that the value of birefringence in 3AT was extremely high (Δn = 0.39). When two s-polarized writing beams (Ar+ laser, 488 nm) were interfered on the surface of the 3AT film in the glassy state, multiple diffraction beams were observed immediately, resulting from the grating formation. We explored the effect of light intensity on the grating formation and the relation between the alignment change and η. The value of η showed a maximum when the change in photoinduced alignment was almost completed. Furthermore the value of η was relatively high (η = 20%) even though the alignment change of mesogens was small.

AB - We studied the formation of gratings by means of the photoinduced alignment change of polymer liquid crystals (PLCs) in a glassy state. To obtain high diffraction efficiency (η), we prepared a novel PLC containing an azobenzene group directly connected with a tolane moiety (3AT) which has large birefringence (Δn). It was found that the value of birefringence in 3AT was extremely high (Δn = 0.39). When two s-polarized writing beams (Ar+ laser, 488 nm) were interfered on the surface of the 3AT film in the glassy state, multiple diffraction beams were observed immediately, resulting from the grating formation. We explored the effect of light intensity on the grating formation and the relation between the alignment change and η. The value of η showed a maximum when the change in photoinduced alignment was almost completed. Furthermore the value of η was relatively high (η = 20%) even though the alignment change of mesogens was small.

KW - Azobenzene

KW - Holographic grating

KW - Polymer liquid crystal

KW - Tolane

UR - http://www.scopus.com/inward/record.url?scp=1842687176&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1842687176&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:1842687176

VL - 5213

SP - 139

EP - 146

BT - Proceedings of SPIE - The International Society for Optical Engineering

A2 - Khoo, I.-C.

ER -