Single Quantum Dot Coupled to a Scanning Optical Antenna: A Tunable Superemitter

J. N. Farahani, D. W. Pohl, H.-J. Eisler, and B. Hecht
Phys. Rev. Lett. 95, 017402 – Published 28 June 2005

Abstract

The interaction of a single quantum dot with a bowtie antenna is demonstrated for visible light. The antenna is generated at the apex of a Si3N4 atomic force microscopy tip by focused ion beam milling. When scanned over the quantum dot, its photoluminescence is enhanced while its excited-state lifetime is decreased. Our observations demonstrate that the relaxation channels of a single quantum emitter can be controlled by coupling to an efficiently radiating metallic nanoantenna.

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  • Received 30 December 2004

DOI:https://doi.org/10.1103/PhysRevLett.95.017402

©2005 American Physical Society

Authors & Affiliations

J. N. Farahani, D. W. Pohl, H.-J. Eisler, and B. Hecht*

  • Nano-Optics group, National Center of Competence for Research in Nanoscale Science, Institute of Physics, University of Basel, Klingelbergstr. 82, CH-4056 Basel, Switzerland

  • *Electronic address: bert.hect@nano-optics.ch

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Vol. 95, Iss. 1 — 1 July 2005

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