Quantum Nanophotonics with Quantum Dots in Photonic Crystals

Date

Dec 9, 2014

Time

1:00 PM - 2:00 PM

Speaker

Prof. Peter Lodahl

Affiliation

University of Copenhagen, Denmark

Language

en

Main Topic

Materialien

Other Topics

Materialien, Physik

Host

Ulrike Steere

Description

The efficient coupling of a quantum emitter to a propagating mode is eagerly sought after since it would enable a number of new opportunities in quantum optics and quantum-information processing. Such a setting would not only constitute a near-ideal deterministic single-photon source, but also enable giant nonlinearities that are sensitive at the level of just a few photons. Quantum-dot sources have in recent years matured significantly and are now capable of producing highly indistinguishable and high-purity single photons. Combined with the ability to enhance light-matter interaction with photonic nanostructures this opens for a realm of novel opportunities for all-solid-state integrated quantum-information processing [1]. We review the recent experimental progress on research using quantum dots coupled to photonic-crystal waveguides. We show that single photons can be channeled into the waveguide with an efficiency exceeding 98% [2] and discuss a how chiral photon-emission can be achieved in specifically prepared waveguides. Finally, we discuss the prospects of scaling the platform to larger quantum architectures for applications in quantum-information processing. References [1] P. Lodahl, S. Mahmoodian, and S. Stobbe, “Interfacing single photons and single quantum dots with photonic nanostructures.” Submitted to Rev. Mod. Phys. arXiv:1312.1079, (2013). [2] M. Arcari, I. Söllner, A. Javadi, S.L. Hansen, S. Mahmoodian, J. Liu, H. Thyrrestrup, E.H. Lee, J.D. Song, S. Stobbe, and P. Lodahl, “Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide.” Physical Review Letters 113, 093603 (2014).

Links

• Seminars at the IFW

Last modified: Dec 9, 2014, 8:44:25 AM