Date

Place

[7-3]
09:50 ~ 10:15
Title:[Invited] Spatially Continuous Tunable Cholesteric Liquid Crystal Laser Array and its Optical Properties
Mi-Yun Jeong (Gyeongsang Nat'l Univ., Korea)
Abstract: Finely spatial-structured 1D cholesteric liquid crystal (CLC) laser array devices have been realized with ~0.3 nm tuning wavelength resolution in full visible spectral range using general CLCs or polymerized CLCs. The continuous tuning behavior of the?CLC cell is due to the fact that the concentration of the pitch gradient matches the helical pitch determined by the wedge cell thickness. For practical device application of PCLC, we studied the stability of the device in detail over time, strong external light sources, and thermal perturbation. Although the laser peak intensities were decreased by up to 34%, the remaining?laser peak intensity is considerable extent to make use. The comprehensive optical properties of the laser lines and fluorescent spectrum generated from the CLC laser array also were studied; the laser lines from a CLC with a right (left)-handed circular helix were right(left)-handed circular polarized and inside the photonic band gap, the CLC structure with right (left)-handed helicity suppressed the fluorescence generated with right (left) circular polarized light and instead the suppressed right (left) circular polarized light energy moved to the outside of the photonic band gap and enhanced with right (left) handed circular polarized light, respectively.
PDF Download

Type