Oscillatory variations in the Q factors of high quality micropillar cavities

S. Reitzenstein, Niels Gregersen, C. Kistner, M. Strauss, C. Schneider, L. Pan, Torben Roland Nielsen, S. Höfling, Jesper Mørk, A. Forchel

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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 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 languageEnglish
JournalApplied Physics Letters
Issue number6
Pages (from-to)061108
Publication statusPublished - 2009

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Copyright (2009) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.



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