GaAs micro-pyramids serving as optical micro-cavities
- Institut fuer Angewandte Physik and Center for Functional Nanostructures (CFN), Universitaet Karlsruhe (Thailand), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe (Germany)
An efficient light-matter coupling requires high-quality (Q) micro-cavities with small mode volume. We suggest GaAs micro-pyramids placed on top of AlAs/GaAs distributed Bragg reflectors to be promising candidates. The pyramids were fabricated by molecular-beam epitaxy, electron-beam lithography and a subsequent wet-chemical etching process using a sacrificial AlAs layer. Measured Q-factors of optical modes in single pyramids reach values up to 650. A finite-difference time-domain simulation assuming a simplified cone-shaped geometry suggests possible Q-factors up to 3600. To enhance the light confinement in the micro-pyramids we intend to overgrow the pyramidal facets with a Bragg mirror--results of preliminary tests are given.
- OSTI ID:
- 21371409
- Journal Information:
- AIP Conference Proceedings, Vol. 1199, Issue 1; Conference: 29. international conference on the physics of semiconductors, Rio de Janeiro (Brazil), 27 Jul - 1 Aug 2008; Other Information: DOI: 10.1063/1.3295456; (c) 2009 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM ARSENIDES
COMPUTERIZED SIMULATION
COUPLING
FINITE DIFFERENCE METHOD
GALLIUM ARSENIDES
INTERFACES
LAYERS
MIRRORS
MOLECULAR BEAM EPITAXY
OPTICAL MODES
PHOTOLUMINESCENCE
SEMICONDUCTOR MATERIALS
VISIBLE RADIATION
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
CALCULATION METHODS
CRYSTAL GROWTH METHODS
ELECTROMAGNETIC RADIATION
EMISSION
EPITAXY
GALLIUM COMPOUNDS
ITERATIVE METHODS
LUMINESCENCE
MATERIALS
MATHEMATICAL SOLUTIONS
NUMERICAL SOLUTION
OSCILLATION MODES
PHOTON EMISSION
PNICTIDES
RADIATIONS
SIMULATION