Surface charge layers and beam coupling in photosensitive polymer-liquid crystal structures

Malgosia Kaczmarek; Andriy Dyadyusha

doi:10.1117/12.563334

15 October 2004 Surface charge layers and beam coupling in photosensitive polymer-liquid crystal structures

Proceedings Volume 5518, Liquid Crystals VIII; (2004) https://doi.org/10.1117/12.563334
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

We present results on DC field and light-induced photorefractive-like gratings in liquid crystal cells made with photosensitive polymer layers. Surface charge layers that develop on a liquid crystal-polymer interface are responsible for screening the liquid crystal bulk from an external DC field. These layers can be selectively discharged via polymer photoconductivity and lead to liquid crystal reorientation grating. Efficient two-beam coupling gain can arise from the reorientation grating for relatively high DC field (above 30 V). For lower voltages, strong diffraction can be observed that reduces the gain. Two-beam coupling gain and diffraction can also be controlled by experimental geometry and liquid crystal alignment. The simulated profile of electric field shows that its penetration depth depends on grating spacing.

Citation Download Citation

Malgosia Kaczmarek and Andriy Dyadyusha "Surface charge layers and beam coupling in photosensitive polymer-liquid crystal structures", Proc. SPIE 5518, Liquid Crystals VIII, (15 October 2004); https://doi.org/10.1117/12.563334

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