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Bradshaw, D. S. 
ORCID: https://orcid.org/0000-0002-6458-432X and Andrews, D. L.
(2008)
The control of near-field optics: Imposing direction through coupling with off-resonant laser light.
Applied Physics B: Lasers and Optics, 93 (1).
pp. 13-20.
Abstract
The well-known spatially distributed form of the near field, associated with a dipolar source, is usually unsuitable for effecting the excitation of a location-specific detector in the vicinity. It is of interest, therefore, to identify a means of producing a much more greatly directed character to such a near field, imposing features that are more commonly associated with longer-range, wave-zone electromagnetic propagation. In this paper, it is shown that nonlinear optical coupling with off-resonant, throughput laser light can achieve this effect. Based on a quantum electrodynamical analysis it is shown that two mechanisms contribute; one requires both the source and detector to be irradiated by the throughput radiation, the other can operate with the source alone irradiated. The analysis leads to results identifying the dependence of each mechanism on the relative directions of the laser beam and the source-detector displacement. Contour maps of the ensuing near field, at the source emission frequency, exhibit a directionality that grows with the off-resonant beam intensity. The phenomenon affords a means of achieving optical control over the near-field distribution. © 2008 Springer-Verlag.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Chemistry |
| UEA Research Groups: | Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017) Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Centre for Photonics and Quantum Science |
| Related URLs: | |
| Depositing User: | Rachel Smith |
| Date Deposited: | 05 Nov 2010 14:07 |
| Last Modified: | 09 Feb 2023 13:35 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/10661 |
| DOI: | 10.1007/s00340-008-3144-x |
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