Regensburg 2019 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 33: Quantum light sources
HL 33.2: Vortrag
Mittwoch, 3. April 2019, 15:15–15:30, H34
Integrated quantum photonics based on InAs/GaAs quantum dots monolithically coupled to ridge waveguides — •Dominik Koeck1, Lukasz Dusanowski1, Soon-Hong Kwon2, Christian Schneider1, and Sven Hoefling1 — 1Technische Physik, University of Wuerzburg, Physikalisches Institut and Wilhelm-Conrad-Roentgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Wuerzburg, Germany — 2Department of Physics, Chung-Ang University, 156-756 Seoul, Korea
Hereby we show our recent advances in fabrication and optical characterization of InAs/GaAs QDs monotonically integrated with single- and multimode distributed Bragg reflector ridge waveguides. Identification of excitonic and biexcitonic transitions have been performed by power- and polarization-resolved microphotoluminescence studies. In order to evaluate the non-classicality of QD transitions, second-order auto-correlation measurements where performed in Hanbury Brown and Twiss configuration. In case of both, continuous and pulsed excitation of the QD’s transitions we observed clear signatures of single photon emission with g(2)(0) values below 0.1, confirming pure single photon character of the emitted light. Future directions include efforts towards more advanced integrated functionalities such as ring resonators and directional couplers needed for on-chip single photon processing.