Abstract
A new fully functionalized photorefractive polyimine was prepared by the condensation polymerization between a photoconducting carbazole derivative, 9-(2-ethylhexyl)carbazole-3,6-dicarbaldehyde, and a nonlinear optical stilbene chromophore, 4-[N,N-bis(2-aminoethyl)amino]-4′-nitrostilbene. It showed excellent solubility in common organic solvents such as chloroform, cyclohexanone, tetrahydrofuran, etc. and high optical quality films were obtained by free standing film casting. Very high second order optical nonlinearity with d33 = 120 pm/V was observed by second harmonic generation at the fundamental 1064 nm wavelength. It demonstrated good thermal stability of the aligned dipoles by electric field up to ca. 125°C. The diffraction grating was formed by the interference of two coherent Ar-ion laser beam at the wavelength of 488 nm. A holographic diffraction efficiency of about 15% has been achieved in a 10 μm-thick film. Storage state of our film shows remarkably long stability at room temperature.
Original language | English |
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Pages (from-to) | 142-151 |
Number of pages | 10 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 3471 |
DOIs | |
Publication status | Published - 1998 |
Externally published | Yes |
Event | Xerographic Photoreceptors and Organic Photorefractic Materials IV - San Diego, CA, United States Duration: 1998 Jul 22 → 1998 Jul 23 |
Keywords
- Carbazole
- Diffraction efficiency
- Photorefractive polymer
- Polyimine
- Second-harmonic generation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering