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Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 65: Quantum Optics on the Nanoscale: From Fundamental Physics to Quantum Technologies (joined session, HL, DS, O, TT, organized by HL)

HL 65.2: Hauptvortrag

Donnerstag, 23. März 2017, 10:00–10:30, HSZ 02

Controlled strong coupling of a single quantum dot to a plasmonic nanoresonator at room temperatureHeiko Groß1, Joachim M. Hamm2, Tommaso Tufarelli2, Ortwin Hess2, and •Bert Hecht11Nano-Optics and Biophotonics Group, Universität Würzburg, 97074 Würzburg, Germany — 2The Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom

We demonstrate controlled and tunable strong coupling of a mesoscopic plasmonic slit resonator and a single colloidal quantum dot at room temperature. Strong coupling is achieved (i) by placing the quantum dot within the mode field of the nanoresonator with nm precision using scanning probe technology and (ii) by exploiting the collective coupling of the band-edge multiplet of states to the broadband plasmonic resonance. Due to the resulting fast rate of energy exchange the strong coupling regime is reached and besides the exciton also the otherwise quenched trion state couples strongly with the slit resonator resulting in a four-peaked spectrum under strong-coupling conditions.

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