title: Optical modes in semiconductor microtube ring resonators.
abstract: We demonstrate optical modes in InGaAs/GaAs microtubes acting as optical ring resonators. Self-supporting microtubes were fabricated by optical lithography and wet-etching processes utilizing the self-rolling mechanism of strained bilayers. The optical modes were probed by the photoluminescence of InAs quantum dots embedded in the tube's wall. In this novel microtube ring resonator we find a spectrum of sharp modes. They are in very good agreement with the theoretical results for a closed thin dielectric waveguide.
authors.affiliation: Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, 20355 Hamburg, Germany. ktipp@physnet.uni-hamburg.de
authors.forename: T
authors.initials: T
authors.lastname: Kipp
authors.forename: H
authors.initials: H
authors.lastname: Welsch
authors.forename: Ch
authors.initials: Ch
authors.lastname: Strelow
authors.forename: Ch
authors.initials: Ch
authors.lastname: Heyn
authors.forename: D
authors.initials: D
authors.lastname: Heitmann