Regensburg 2016 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 30: Focus Session: On-Chip Quantum Photonics I

HL 30.1: Invited Talk

Tuesday, March 8, 2016, 11:00–11:30, H16

On-chip quantum photonics with integrated quantum dot emitters — •Mark Fox — Department of Physics & Astronomy, University of Sheffield, Sheffield S3 7RH, U.K.

On-chip quantum photonics relies on the integration of efficient single-photon sources with advanced quantum-optical circuits. In this presentation I will review progress at the University of Sheffield on a chip-compatible III-V semiconductor platform in which quantum-dot (QD) single-photon sources are integrated into GaAs photonic circuits. I will first describe work demonstrating a monolithic on-chip Hanbury Brown-Twiss interferometer, a resonantly-excited QD source emitting high coherence single photons into a single-mode waveguide, and an on-chip single-photon router [1]. I will then discuss experiments investigating the coupling of the spin of single QD excitons to circularly-polarized photonic modes on chip [2], focusing on very recent results demonstrating chiral emission from quantum dots embedded in nano-photonic waveguides [3]. These results lay the foundations for more complex photonic integration, opening the route to multi-qubit circuits with advanced quantum-optical functionality.

[1] N. Prtljaga et al., Appl. Phys. Lett. 23, 231107 (2014); M.N. Makhonin, et al. Nano Letters, 14, 6997-7002 (2014); C. Bentham, et al. Appl. Phys. Lett., 106, 221101 (2015)

[2] I.J. Luxmoore, et al. Phys. Rev. Lett., 110, 037402 (2013); R.J. Coles, et al., Optics Express, 22, 2376-2385 (2014)

[3] R. J. Coles et al., arXiv:1506.02266