Second harmonic generation studies of polymer-stabilized cholesteric texture films

Andy Ying Guey Fuh, Chi-Yen Huang, Cheuk Wah Lau

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Using a mode-locking Nd:YAG laser, we measured the second harmonic generation (SHG) of polymer-stabilized cholesteric texture (PSCT) films. The SHG observed in these samples is due to the dielectric gradient which arises from the interfaces between the cholesteric liquid crystal/polymer and those between the adjacent cholesteric focal conic domains having a different helical axis. Both the SHG intensities and the electro-optical characteristics of PSCT films were measured as a function of the polymer concentration. In addition, polymer network structures formed in PSCT films were investigated. Good correlations among the SHG measurements, electro-optical characteristics, and the polymer network morphologies were found. This means that SHG measurements could provide us with another qualitative, nondestructive method to analyze the PSCT films.

Original languageEnglish
Pages (from-to)2754-2759
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume36
Issue number5 A
Publication statusPublished - 1997 May 1

Fingerprint

Harmonic generation
harmonic generations
textures
Textures
polymers
Polymers
Cholesteric liquid crystals
Laser mode locking
Liquid crystal polymers
locking
YAG lasers
liquid crystals
Lasers
gradients

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "Using a mode-locking Nd:YAG laser, we measured the second harmonic generation (SHG) of polymer-stabilized cholesteric texture (PSCT) films. The SHG observed in these samples is due to the dielectric gradient which arises from the interfaces between the cholesteric liquid crystal/polymer and those between the adjacent cholesteric focal conic domains having a different helical axis. Both the SHG intensities and the electro-optical characteristics of PSCT films were measured as a function of the polymer concentration. In addition, polymer network structures formed in PSCT films were investigated. Good correlations among the SHG measurements, electro-optical characteristics, and the polymer network morphologies were found. This means that SHG measurements could provide us with another qualitative, nondestructive method to analyze the PSCT films.",
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Second harmonic generation studies of polymer-stabilized cholesteric texture films. / Fuh, Andy Ying Guey; Huang, Chi-Yen; Lau, Cheuk Wah.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 36, No. 5 A, 01.05.1997, p. 2754-2759.

Research output: Contribution to journalArticle

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