1 December 1990 Optical intensity modulation using ferro-electric liquid crystal
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Ferroelectric liquid crystals have been the subject of investigation, ever since its discovery as a display element in dynamic display systems. Electro-optic studies show that most of the materials exhibits a permanent switched state above a threshold field. It rarely exhibited a linear proportiotnality of transmitted light with applied field. In this paper a new material has been investigated. Electro-optic switching characteristics in bulk samples of ferro-electric liquid crystal, 4'-(n-Octyl Benzoloxy) -4- (2-Octyloxy) Biphenyl [OBOB]gwere studied for various pulse widths of the applied field. It shows three distinct regions of response. For large pulse widths, above a threshold field, a permanent switched state with maximum intensity of light transmission was achieved. This corresponds to the expected ferroelectric liquid crystal switching behaviour. For medium pulse widths the intensity of the transmitted light varies directly as the applied field over a particular range of pulse widths. This region of response, where the intensity of light is modulated with the applied field is the one most suited for device application.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. G. Balakrishnan, K. G. Balakrishnan, P. Ramakrishnan, P. Ramakrishnan, } "Optical intensity modulation using ferro-electric liquid crystal", Proc. SPIE 1337, Nonlinear Optical Properties of Organic Materials III, (1 December 1990); doi: 10.1117/12.22965; https://doi.org/10.1117/12.22965

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