Chinese Optics Letters, 2013, 11 (s1): S10102, Published Online: May. 30, 2013
Tuning circular Bragg phenomenon of TiO2 sculptured thin f ilms with chiral structure
310.1860 Deposition and fabrication 310.5448 Polarization, other optical properties 160.1585 Chiral media
Abstract
TiO2 chiral sculptured thin films (CSTFs) prepared using glancing angle deposition (GLAD) method based on electron beam evaporation are studied. The relationship between structural parameters and circular Bragg phenomenon (CBP) is investigated. Results demonstrate that, the central wavelength of Bragg regime red-shifts with the increasing pitch of helix, and peak value of selective transmittance will increase after adding more turns to the helix. After annealing, the central wavelength blue-shifts and the peak value rises. Tuning CBP by modulating the deposition parameters and annealing can optimize the performance of circularly polarized devices fabricated from CSTFs.
Difan Luo, Chendi Huang, Shaoji Jiang. Tuning circular Bragg phenomenon of TiO2 sculptured thin f ilms with chiral structure[J]. Chinese Optics Letters, 2013, 11(s1): S10102.