title: Band-tunable color cone lasing emission based on dye-doped cholesteric liquid crystals with various pitches and a pitch gradient.
abstract: This study elucidates, for the first time, a novel band-tunable color cone lasing emission (CCLE) based on dye-doped cholesteric liquid crystal (DDCLC) films with various pitches. For several CLC cells with different pitches it was shown experimentally that the lasing band on the CCLE can be tuned among various color regions measured within different angular ranges. Some important features of the tunable CCLE are also identified and discussed. A spatially band-tunable color cone laser, based on a single DDCLC with a gradient pitch, is developed as a real application.
authors.affiliation: 1Institute of Electro-Optical Science and Engineering and Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan 701, Republic of China. crlee@mail.ncku.edu.tw
authors.forename: C-R
authors.initials: CR
authors.lastname: Lee
authors.forename: S-H
authors.initials: SH
authors.lastname: Lin
authors.forename: H-C
authors.initials: HC
authors.lastname: Yeh
authors.forename: T-D
authors.initials: TD
authors.lastname: Ji
mesh_terms: D003116:Color; D004396:Coloring Agents / Q000737:chemistry*; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D050866:Liquid Crystals / Q000737:chemistry*
chemical_list: D004396:Coloring Agents