Dresden 2017 – scientific programme

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SYQO: Symposium Quantum Optics on the Nanoscale: From Fundamental Physics to Quantum Technologies

SYQO 1: Quantum Optics on the Nanoscale: From Fundamental Physics to Quantum Technologies

SYQO 1.2: Invited Talk

Thursday, March 23, 2017, 10:00–10:30, HSZ 02

Controlled strong coupling of a single quantum dot to a plasmonic nanoresonator at room temperature — Heiko Groß¹, Joachim M. Hamm², Tommaso Tufarelli², Ortwin Hess², and •Bert Hecht¹ — ¹Nano-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.