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A planar dielectric antenna for directional single-photon emission and near-unity collection efficiency

Title
A planar dielectric antenna for directional single-photon emission and near-unity collection efficiency
Author
이광걸
Keywords
LIGHT-EMISSION; QUANTUM-DOT; ROOM-TEMPERATURE; THIN-FILM; FLUORESCENCE; NANOWIRE; DIPOLES
Issue Date
2011-03
Publisher
NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Citation
NATURE PHOTONICS,Vol.5 No.3 [2011],166-169
Abstract
Single emitters have been considered as sources of single photons in various contexts, including cryptography, quantum computation, spectroscopy and metrology(1-3). The success of these applications will crucially rely on the efficient directional emission of photons into well-defined modes. To accomplish high efficiency, researchers have investigated microcavities at cryogenic temperatures(4,5), photonic nanowires(6,7) and near-field coupling to metallic nano-antennas(8-10). However, despite impressive progress, the existing realizations substantially fall short of unity collection efficiency. Here, we report on a theoretical and experimental study of a dielectric planar antenna, which uses a layered structure to tailor the angular emission of a single oriented molecule. We demonstrate a collection efficiency of 96% using a microscope objective at room temperature and obtain record detection rates of similar to 50 MHz. Our scheme is wavelength-insensitive and can be readily extended to other solid-state emitters such as colour centres(11,12) and semiconductor quantum dots(13,14).
URI
https://www.nature.com/articles/nphoton.2010.31210.1038/NPHOTON.2010.312
ISSN
1749-4885
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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