Highly directional emission from a quantum emitter embedded in a hemispherical cavity
| Autor: | G. C. Ballesteros, Yong Ma, Brian D. Gerardot, Jining Sun, Joanna M. Zajac |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Finite-difference time-domain method Physics::Optics Diamond Dielectric engineering.material Atomic and Molecular Physics and Optics Optics Solid immersion lens Quantum dot engineering Physics::Accelerator Physics business Refractive index Quantum Beam (structure) |
| Zdroj: | Optics letters. 40(10) |
| ISSN: | 1539-4794 |
| Popis: | 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 ≈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. |
| Databáze: | OpenAIRE |
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