Ferroelectric liquid crystalline polymers with large pyroelectric coefficients for infrared detectors

J. Ruth; Banahalli R. Ratna; Jawad W. Naciri; Ranganathan Shashidhar; S. K. Prasad; D. S. Shankar Rao; S. Chandrasekhar

doi:10.1117/12.151209

13 August 1993 Ferroelectric liquid crystalline polymers with large pyroelectric coefficients for infrared detectors

J. Ruth, Banahalli R. Ratna, Jawad W. Naciri, Ranganathan Shashidhar, S. K. Prasad, D. S. Shankar Rao, S. Chandrasekhar

Proceedings Volume 1911, Liquid Crystal Materials, Devices, and Applications II; (1993) https://doi.org/10.1117/12.151209
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

Abstract

We have synthesized many ferroelectric side-chain liquid crystalline polymers exhibiting the Smectic C^* phase over a wide temperature range extending to sub-ambient temperatures. The tuning of the mesophase temperature has been achieved by incorporating two different mesogens as side groups attached to the siloxane backbone. These copolymers exhibit large values of spontaneous polarization which varies linearly through out the Smectic C^* phase. The pyroelectric coefficient and dielectric constants of these materials have been measured. The potential of these ferroelectric liquid crystals as pyroelectric detector materials will be examined.

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J. Ruth, Banahalli R. Ratna, Jawad W. Naciri, Ranganathan Shashidhar, S. K. Prasad, D. S. Shankar Rao, and S. Chandrasekhar "Ferroelectric liquid crystalline polymers with large pyroelectric coefficients for infrared detectors", Proc. SPIE 1911, Liquid Crystal Materials, Devices, and Applications II, (13 August 1993); https://doi.org/10.1117/12.151209

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