Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 54: Photonics I
Q 54.6: Talk
Friday, March 21, 2014, 12:00–12:15, UDL HS3038
Laser-Written Parabolic Micro-Mirrors for High Single Photon Collection Efficiency — •Andreas W. Schell1, Tanja Neumer1, Qiang Shi2, Johannes Kaschke2, Joachim Fischer2, Martin Wegener2, and Oliver Benson1 — 1Humboldt-Universität zu Berlin, Institut für Physik, AG Nanooptik, 12489 Berlin, Germany — 2Karlsruhe Institute of Technology (KIT), Institute of Applied Physics, DFG-Center for Functional Nanostructures, Institute of Nanotechnology, 76128 Karlsruhe, Germany
The efficient collection of single photons from solid-state single photon emitters, like quantum dots or defect centers in diamond, is a very demanding task. Typically, rather bulky high numerical aperture objectives are used to cover a solid angle as large as possible in order to maximize the number of collected photons. In this presentation we will introduce parabolic micro-mirrors fabricated by the process of two-photon direct laser-writing and silver evaporation. This technique allows for direct integration of stable single photon emitters such as the nitrogen vacancy (NV) centers in nanodiamonds [1]. The mirrors are produced in an aligned overlay process, i.e. their focus is centered around a single pre-characterized NV center. In this way we obtain an extraordinary high collection efficiency in a very small solid angle, allowing for easy collection of photons even with low numerical apertures.
[1] A. W. Schell et al., Scientic Reports 3, 1577 (2013).