Abstract
Whispering gallery modes (WGMs) around the liquid crystal droplets are sensitive to the director orientation at the interface. An electric field was applied for changing the director orientation of a nematic liquid crystal droplet surrounded by polydimethylsiloxane (PDMS), which induced vertical director orientation at the interface. WGMs were shifted by varying the electric field intensity, and WGM shift-dependent director response was calculated. From this calculation we obtained the extrapolation length of 0.35 ± 0.02 μm. These results indicate that WGM sensitivity can be used for obtaining the surface properties of liquid crystals.
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