title: Spatially tunable photonic bandgap of wide spectral range and lasing emission based on a blue phase wedge cell.
abstract: This study demonstrates for the first time a continuously tunable photonic bandgap (PBG) of wide spectral range based on a blue phase (BP) wedge cell. A continuously shifting PBG of the BP wedge cell occurs due to the thickness gradient of the wedge cell at a fixed temperature. The wedge cell provides a gradient of boundary force on the LCs and thus forms a distribution of BP crystal structure with a gradient lattice. Additionally, a spatially tunable lasing emission based on a dye-doped BP (DDBP) wedge cell is also demonstrated. The tunable band of the PBG and lasing emission is about 130 nm and 70 nm, respectively, which tuning spectral ranges are significantly wider than those of CLC and DDCLC wedge cells, respectively. Such a BP device has a significant potential in applications of tunable photonic devices and displays.
authors.forename: Jia-De
authors.initials: JD
authors.lastname: Lin
authors.forename: Shuan-Yu
authors.initials: SY
authors.lastname: Huang
authors.forename: Hong-Sheng
authors.initials: HS
authors.lastname: Wang
authors.forename: Shih-Hung
authors.initials: SH
authors.lastname: Lin
authors.forename: Ting-Shan
authors.initials: TS
authors.lastname: Mo
authors.forename: Chi-Ting
authors.initials: CT
authors.lastname: Horng
authors.forename: Hui-Chen
authors.initials: HC
authors.lastname: Yeh
authors.forename: Lin-Jer
authors.initials: LJ
authors.lastname: Chen
authors.forename: Hong-Lin
authors.initials: HL
authors.lastname: Lin
authors.forename: Chia-Rong
authors.initials: CR
authors.lastname: Lee
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D007834:Lasers; D017785:Photons; D013050:Spectrometry, Fluorescence; D013696:Temperature
chemical_list: D004396:Coloring Agents