Abstract
We report on the observation of oscillatory variations in the quality (Q) factor of quantum dot-micropillar cavities based on planar Bragg reflectors. The oscillatory behavior in the Q versus diameter dependence appears in the diameter range between 1.0 and 4.0 mu m, has a characteristic period of a few hundred nanometers and increases in amplitude with increasing reflectivity of the planar microcavity structures. The experimental results are well reproduced by numerical calculations which support the interpretation that the Q oscillations are caused by coupling of propagating Bloch modes of different orders at the mirror interfaces.
Original language | English |
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Article number | 061108 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 94 |
Issue number | 6 |
DOIs | |
Publication status | Published - 9 Feb 2009 |
Keywords
- Bragg gratings
- microcavities
- micromirrors
- optical planar waveguides
- PILLAR MICROCAVITIES