Talk: Efficient light-matter interfaces for solid state quantum emitters

Talk By Prof. Dr. David Hunger

Physikalisches Institut
Karlsruhe Institute of Technology, Germany


Optical microcavities are a powerful tool to enhance light-matter interactions. This enables applications ranging from ultra-sensitive spectroscopy and sensing to quantum information. To achieve large cavity enhancement on an accessible platform, we have developed microscopic Fabry-Perot cavities based on laser-machined optical fibers [1].

We employ such cavities to realize efficient readout of individual quantum emitters by means of Purcell enhancement of fluorescence emission. We study solid state quantum emitters such as NV centers in diamond [2,3] and rare earth ions [4], with the goal to realize key elements of a quantum repeater for long-distance quantum communication, and optically addressable multi-qubit registers as quantum computing nodes.

[1] D. Hunger et al., New J. Phys. 12, 065038 (2010)
[2] H. Kaupp et al., Phys Rev Applied 6, 054010 (2016)
[3] J. Benedikter et al., Phys Rev Applied 7, 024031 (2017)
[4] B. Casabone et al., New J. Phys. 20, 095006 (2018)


ons 12 jun 19


DTU Fysik


DTU Lyngby
Bygning 311
Lounge/1. sal