CeNS Center for NanoScience LMU Ludwig-Maximilians-Universität München
CeNS HomepageLMU Homepage
Home  >  Calendar  >  Götzinger

CeNS Colloquium

Kleiner Physikhörsaal
Date: 21.10.2016, Time: 15:30h

Controlling the interaction of light and matter at the level of single quanta

Prof. Stephan Götzinger, MPI for the Science of Light Erlangen

Novel concepts aiming at an efficient processing of information require a strong and controlled coupling of single photons with single atomic quantum systems. In this talk I will first give an introduction into the efficient generation of single photons using planar dielectric antennas [1]. These antennas serve to direct the emission from a single emitter with >99% efficiency towards a collection optics and allows us to obtain intensity squeezed light from a single emitter quantum light source [2]. In the second part of the talk I will discuss our efforts towards the realization of quantum networks [3] and present experiments where photons and single solid state emitters strongly interact. A single molecule can amplify a weak laser beam and generate nonlinear effects like three-photon amplification and four-wave mixing [4, 5]. In order to achieve an even stronger interaction we have started to implement various approaches including waveguides, microcavities and plasmonic nanostructures.

[1] K. G. Lee, et al., A planar dielectric antenna for directional single-photon emission and near-unity collection efficiency, Nature Phot. 5, 166 (2011). [2] X.-L. Chu, et al., A high-fidelity photon gun: intensity-squeezed light from a single molecule, arXiv:1608.07980 [quant-ph], (2016). [3] Y. L. A. Rezus, et al., Single-Photon Spectroscopy of a Single Molecule, Phys. Rev. Lett. 108, 093601 (2012). [4] J. Hwang, et al., A single-molecule optical transistor, Nature 460, 76-80 (2009). [5] A. Maser, et al., Few-photon coherent nonlinear optics with a single molecule, Nature Photonics 10, 450-453 (2016).