title: Optical resonance tuning and polarization of thin-walled tubular microcavities.
abstract: We present experimental and finite-difference time-domain simulation results on the tunability of optical resonant modes of spiral microtube cavities, rolled-up from square patterned SiO/SiO(2) thin nanomembranes on glass substrates. The peak positions of resonant TM modes shift to lower energies by coating the microtube wall with Al(2)O(3) monolayers, which is well described by simulations. Moreover, a second group of tunable resonant modes appears beyond a certain critical thickness of the coated Al(2)O(3). The polarization of this group of modes is TE, as we find out by a detailed analysis of the polarization-dependent photoluminescence spectra.
authors: Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany.
authors: Vladimir A
authors: VA
authors: Bolaños Quiñones
authors: Gaoshan
authors: G
authors: Huang
authors: Johannes D
authors: JD
authors: Plumhof
authors: Suwit
authors: S
authors: Kiravittaya
authors: Armando
authors: A
authors: Rastelli
authors: Yongfeng
authors: Y
authors: Mei
authors: Oliver G
authors: OG
authors: Schmidt
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008904:Miniaturization; D008962:Models, Theoretical; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers