Experimental test of a two-dimensional approximation for dielectric microcavities

S. Bittner, B. Dietz, M. Miski-Oglu, P. Oria Iriarte, A. Richter, and F. Schäfer
Phys. Rev. A 80, 023825 – Published 28 August 2009

Abstract

Open dielectric resonators of different shapes are widely used for the manufacture of microlasers. A precise determination of their resonance frequencies and widths is crucial for their design. Most microlasers have a flat cylindrical geometry, and a two-dimensional approximation, the so-called method of the effective index of refraction, is commonly employed for numerical calculations. Our aim has been an experimental test of the precision and applicability of a model based on this approximation. We performed very thorough and accurate measurements of the resonance frequencies and widths of two passive circular dielectric microwave resonators and found significant deviations from the model predictions. From this we conclude that the model generally fails in the quantitative description of three-dimensional dielectric resonators.

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  • Received 19 March 2009

DOI:https://doi.org/10.1103/PhysRevA.80.023825

©2009 American Physical Society

Authors & Affiliations

S. Bittner1, B. Dietz1, M. Miski-Oglu1, P. Oria Iriarte1, A. Richter1,2,*, and F. Schäfer1

  • 1Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
  • 2ECT*, Villa Tambosi, Villazzano, I-38100 Trento, Italy

  • *richter@ikp.tu-darmstadt.de

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Vol. 80, Iss. 2 — August 2009

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