Freiburg 2019 – wissenschaftliches Programm
FM 84.4: Poster
Donnerstag, 26. September 2019, 16:30–18:30, Tents
Towards techniques for on-chip pump filtering of light sources — •Julian Brockmeier1, Jan Philipp Höpker1, Maximilian Protte1, Harald Herrmann2, Christof Eigner2, Christine Silberhorn2, and Tim Bartley1 — 1Mesoskopische Quantenoptik, Department Physik, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany — 2Integrierte Quantenoptik, Department Physik, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
Integrated sources of quantum light are increasingly used in many quantum photonic technologies. Many of these sources are optically driven, based on a nonlinear process such as spontaneous parametric down-conversion (SPDC) or four-wave mixing (SFWM). It is also desirable to place detectors on the same chips as the sources, to reduce overall losses and latency of the photonic circuits. However, the strong pump must be separated from the single-photon level quantum light prior to detection. This is a challenging task due to the huge difference in relative power levels, as well as the requirement of low-loss on the quantum light. We present several schemes using titanium in-diffused lithium niobite waveguides which may offer progress towards the goal of on-chip pump filtering, based on both waveguide design, dispersion engineering and high-speed response of superconducting integrated detectors.