title: Measuring nematic liquid crystal anchoring energy using whispering gallery modes.
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.
authors.forename: Keon-Joo
authors.initials: KJ
authors.lastname: Lee
authors.forename: Sung-Jo
authors.initials: SJ
authors.lastname: Kim
authors.forename: Daeseung
authors.initials: D
authors.lastname: Kang
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Kim