Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.7: Poster

Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais

Single-photon collection from a quantum dot with a parabolic mirror — •Vsevolod Salakhutdinov1,2, Markus Sondermann1,2, and Gerd Leuchs1,21Max Planck Institute for the Science of Light, Erlangen, Germany — 2Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Erlangen, Germany

Quantum dots are promising sources of single photons for quantum-computation applications. Here, we investigate CdSe/CdS dot-in-rod (DR) nano crystals, which have been shown to act as single-photon sources even at room-temperature [1]. One particular feature of these dots is their emission pattern which is close to the one of a linear dipole. However, enhancing the collection-efficiency for the emitted photons is still an open problem.

In this contribution we present an approach to enhance emission collection from these dots by means of a deep parabolic mirror covering almost the entire solid angle [2]. This setup is especially suited for linear-dipole emitters. The DR nano crystals are placed onto the flat surface of hemispheres and positioned in the focal region of the parabolic mirror. We discuss the achieved collection efficiency and assess possible improvements of the setup.

[1] F. Pisanello et al., Appl. Phys. Lett. 96, 033101 (2010)

[2] R. Maiwald et al., Phys. Rev. A 86 , 043431 (2012)

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