Highly directional emission from a quantum emitter embedded in a hemispherical cavity

Y. Ma, Guillem Ballesteros-Garcia, J. M. Zajac, Jining Sun, B. D. Gerardot

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Abstract

We report the design of a solid-state, micron-sized hemispherical cavity that yields significantly enhanced extraction efficiency with modest Purcell enhancement from embedded quantum emitters. A simple analytical model provides a guideline for the design and optimization of the structure, while finite-difference time-domain simulations are used for full analysis of the optimum structure. Cavity modes with up to 90% extraction efficiency, a Purcell enhancement factor >2, and a quality factor of approximate to 50 are achieved. In addition, Gaussian-like far-field beam profiles with low divergence are exhibited for several modes. These monolithic cavities are promising for solid-state emitters buried in a high dielectric environment, such as self-assembled quantum dots and optically active defects in diamond. (C) 2015 Optical Society of America

Original languageEnglish
Pages (from-to)2373-2376
Number of pages4
JournalOptics Letters
Volume40
Issue number10
DOIs
Publication statusPublished - 15 May 2015

Keywords

  • SOLID IMMERSION LENS
  • LIGHT EXTRACTION
  • REFRACTIVE-INDEX
  • MICROCAVITIES
  • FLUORESCENCE

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