Article,

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

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Phys. Rev. Lett., 95 (1): 017402 (Jun 28, 2005)
DOI: 10.1103/PhysRevLett.95.017402

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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