Optical modes in semiconductor microtube ring resonators |
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Authors: | Kipp T Welsch H Strelow Ch Heyn Ch Heitmann D |
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Affiliation: | Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universit?t Hamburg, 20355 Hamburg, Germany. ktipp@physnet.uni-hamburg.de |
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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. |
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