Regensburg 2016 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 30: Focus Session: On-Chip Quantum Photonics I
HL 30.2: Invited Talk
Tuesday, March 8, 2016, 11:30–12:00, H16
Quantum photonics with quantum dot single photons in silicon oxynitride waveguide circuits — •Anthony Bennett1, James Lee1,2, David Ellis1, Eoin Murray1,3, Frederik Floether1,3, Jonathon Griffiths3, Thomas Meany1, Ian Farrer3, David Ritchie3, and Andrew Shields1 — 1Toshiba Research Europe Limited, Cambridge Research Laboratory, 208 Science Park, Milton Road, Cambridge, CB4 OGZ, United Kingdom. — 2Engineering Department, University of Cambridge, 9 J. J. Thomson Avenue, Cambridge, CB3 0FA,United Kingdom. — 3Cavendish Laboratory, Cambridge University, J. J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom.
The interferometric stability and scalability of silicon oxynitride circuits makes them well suited to quantum optics experiments. Waveguides, phase shifters and couplers can be combined with a semiconductor light source to create an attractive and compact source of few-photon quantum states.
We report our experiments where resonant pi-pulse excitation of quantum dots in micro-pillars creates highly indistinguishable photons. We overlap these photons in a SiON circuit to create a two-photon N00N state, and show its phase super-resolving ability (A. J. Bennett et al, arxiv.org/abs/1508.01637 (2015)). We also report a device where the semiconductor light source is directly bonded to the end facet of the SiON circuit. The photonic circuit is then used to measure the quantum nature of the emitted light and create path-encoded qubits (E. Murray et al, Appl. Phys. Lett. 107, 171108 (2015)).