Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 5: Quantum Dots and Wires: Single Photon Sources

HL 5.1: Hauptvortrag

Montag, 7. März 2016, 09:30–10:00, H15

Quantum optics with quantum dots in photonic wires — •Jean-Michel Gerard — Institute for Nanosciences and Cryogenics, Grenoble, France

Over the last 20 years, quantum dots have been fruitfully combined with optical microcavities to perform quantum optics experiments and to develop quantum light sources for QIPC. In this talk, I will show that the very basic photonic wire geometry opens an attractive alternative avenue in this context [1]. I will noticeably introduce the Photonic Trumpet (PT) [2], formed by a high-index single-mode waveguide and a conical tapering. Nearly perfect single-mode emission, low-divergence Gaussian radiation pattern, linear polarization control, efficient wavelength tuning based on strain effects, and high efficiency single photon emission (> 0.75 photon per pulse) are reported for a single quantum dot embedded in a PT. The PT also appears as a very promising platform to explore the unique optical properties of one-dimensional atoms[3] and hybrid optomechanical systems where the interaction between the two-level quantum system and mechanical modes is mediated by strain [4]. Work done with J. Claudon, J Bleuse, M Munsch, P Stepanov and with the groups of JP Poizat, O Arcizet, A Auffèves, M Richard (CNRS I. Néel Grenoble) and N Gregersen (DTU), who are gratefully acknowledged. [1] For a review see J Claudon et al Chem Phys Chem 14, 1393 (2013); [3] M. Munsch et al, PRL 110, 177402 and 239902(E) (2013) ; P Stepanov et al APL 106, 041112 (2015) : [4] D. Valente et al, New J. Phys 14, 083029 (2012); Phys Rev A 86, 022333 (2012) [5] I. Yeo et al, Nat. Nano. 9, 106 (2014)