title: Polarization independent Fabry-Pérot filter based on polymer-stabilized blue phase liquid crystals with fast response time.
abstract: This work demonstrates a polarization-independent electrically tunable Fabry-Pérot (FP) filter that is based on polymer-stabilized blue phase liquid crystals (PSBPLCs). An external vertical electric field can be applied to modulate the effective refractive index of the PSBPLCs along the optical axis. Therefore, the wavelength-tuning property of the FP filter is completely independent of the polarization state of the incident light. The change in the birefringence in PSBPLCs is governed by Kerr effect-induced isotropic-to-anisotropic transition, and so the PSBPLCs based FP filter has a short response time. The measured tunability and free spectral range of the FP filter are 0.092 nm/ V and 16nm in the visible region, and 0.12nm/ V and 97nm in the NIR region, respectively, and the response time is in sub-millisecond range. The fast-responding polarization-independent electrically tunable FP filter has substantial potential for practical applications.
authors.affiliation: Department of Photonics, National Sun Yat Sen University, Kaohsiung, Taiwan.
authors.forename: Yan-Han
authors.initials: YH
authors.lastname: Chen
authors.forename: Chun-Ta
authors.initials: CT
authors.lastname: Wang
authors.forename: Chin-Ping
authors.initials: CP
authors.lastname: Yu
authors.forename: Tsung-Hsien
authors.initials: TH
authors.lastname: Lin
mesh_terms: D003116:Color; D004574:Electromagnetic Fields; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D050866:Liquid Crystals / Q000737:chemistry* / Q000528:radiation effects*; D044367:Phase Transition