GaAs pyramids on GaAs/AlAs Bragg reflectors as alternative microcavities |
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| Authors: | M Karl FM Weber J Lupaca-Schomber S Li T Passow W Lffler H Kalt M Hetterich |
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| Institution: | aInstitut für Angewandte Physik and DFG Center for Functional Nanostructures, Universität Karlsruhe (TH), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany |
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| Abstract: | Pyramidal microcavities are a new class of optical resonators with potentially small mode volume and high quality factor. Our GaAs pyramids with embedded InGaAs quantum dots are placed on top of GaAs/AlAs distributed Bragg reflectors to increase the optical confinement at the base of the pyramids. The pyramidal shape is achieved by a wet-chemical etching process using an AlAs sacrificial layer. Temperature-dependent micro-photoluminescence measurements are used to verify optical modes. |
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| Keywords: | Pyramidal microcavity GaAs pyramids Wet-chemical etching |
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