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Optical Engineering

Thin film electro-optic modulator based on single crystal of N-(4-nitrophenyl)-(L)-prolinol (NPP) grown from melt by the modified Bridgman method
Author(s): Zhifu Liu; Sergey S. Sarkisov; Michael J. Curley; Alexander Leyderman; Charles Y. C. Lee
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Paper Abstract

We discuss the plate-guiding method of growing micrometer-thick single crystal films of electro-optic organic material N-(4-nitrophenyl)-(L)-prolinol. This approach has the advantages of full control over the thickness of the film and selection of a proper seed for initial crystal growth. Characterization of the electro-optic properties of the films is performed using the intensity modulation technique with a low (of the order of 10 V) alternating driving voltage. Both the fundamental and double-frequency responses are used for the characterization. The electro-optic effect is pseudolongitudinal since the configuration of the experiment is that of a longitudinal intensity modulator. The main contribution to the effect originated from the transverse component of the external electric field. By purely electro-optic means we determine the orientation of the dielectric axes and measure the half-wave voltage, the figure of merit, and electro-optic coefficients r12 and r22 to be 3.24 kV and 99.2, 461, and 154 pm/V, respectively. We also find that electro-optic coefficients r61 and r63 are two orders of magnitude less than r12 and r22.

Paper Details

Date Published: 1 March 2003
PDF: 10 pages
Opt. Eng. 42(3) doi: 10.1117/1.1542595
Published in: Optical Engineering Volume 42, Issue 3
Show Author Affiliations
Zhifu Liu, Northwestern Univ. (United States)
Sergey S. Sarkisov, Alabama A&M Univ. (United States)
Michael J. Curley, Alabama A&M Univ. (United States)
Alexander Leyderman, Univ. of Puerto Rico (United States)
Charles Y. C. Lee, Air Force Office of Scientific Research (United States)

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