Abstract
A Fabry-Perot cavity is used to enhance the electroclinic electro-optic effect in a planar aligned Smectic A * (SmA *) liquid crystal, which has potential applications in low voltage and high speed spatial light modulators such as the silicon VLSI optical interconnects. Oblique incidence is necessary in order to induce a change of effective extraordinary refractive index experienced by the incident light under an applied electric field. A proof-of-principle experiment using an electroclinic mixture BDH764E has confirmed the proposed scheme. Preliminary results show that contrast ratios of 4:1 and 20:1 are achievable through induced electroclinic tilt angles of about 1° and 2° under applied voltages of 10V and 20V respectively in a 5μm thick cavity.
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