Electric-field enhancement and modulation of permanent grating diffraction in dye and carbon nanotube-doped liquid crystal

Mikail E. Abbasov; Gene O. Carlisle

doi:10.1117/1.3037329

1 November 2008 Electric-field enhancement and modulation of permanent grating diffraction in dye and carbon nanotube-doped liquid crystal

Mikail E. Abbasov, Gene O. Carlisle

Author Affiliations +

Journal of Nanophotonics, Vol. 2, Issue 1, 023510 (November 2008). https://doi.org/10.1117/1.3037329

Abstract

Permanent gratings were written, without the aid of external fields, in planar nematic liquid crystal cells doped with only Methyl Red (MR) as well as cells doped with both Methyl Red and single-wall carbon nanotubes (CNTs). Grating formation based on trans-cis photoisomerism of MR followed by surface adsorption of the cis-isomer was attempted. The diffraction efficiency was easily enhanced and modulated by application of ac fields covering wide ranges of frequency and voltage; thus, allowing for tuning the diffracted signals. Cells doped with MR and CNTs had a maximum relative diffraction efficiency of 67% while cells doped only with MR exhibited a maximum of 28%. The maximum diffraction efficiency appears to be associated with the Fréedericksz threshold voltage. The permanent gratings are robust and have remained stable for over two years.

Citation Download Citation

Mikail E. Abbasov and Gene O. Carlisle "Electric-field enhancement and modulation of permanent grating diffraction in dye and carbon nanotube-doped liquid crystal," Journal of Nanophotonics 2(1), 023510 (1 November 2008). https://doi.org/10.1117/1.3037329

Published: 1 November 2008

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