Second harmonic generation studies of polymer-stabilized cholesteric texture films

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

doi:10.1117/12.326892

14 October 1998 Second harmonic generation studies of polymer-stabilized cholesteric texture films

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

Proceedings Volume 3475, Liquid Crystals II; (1998) https://doi.org/10.1117/12.326892
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Using a mode-locking Nd:YAG laser, we measured the second harmonic generation (SHG) of polymer stabilized cholesteric texture (PSCT) films. 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 different helical axis. Both of the SHG intensities and the electro-optical characteristics of PSCTs were measured as a function of polymer concentration. In addition, polymer network structures formed in PSCTs were investigated. Good correlations among the SHG measurements, electro-optical characteristics, and the polymer network morphologies were found. It means that SHG measurements could provide us another qualitative, nondestructive method to analyze the PSCT films. In addition, SHG change on polymerization can be used to monitor the polymerization of LC-polymer mixtures.

Citation Download Citation

Andy Ying-Guey Fuh, Chi-Yen Huang, and Cheuk-Wah Lau "Second harmonic generation studies of polymer-stabilized cholesteric texture films", Proc. SPIE 3475, Liquid Crystals II, (14 October 1998); https://doi.org/10.1117/12.326892

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available