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Simultaneous measurement of nanoscale electric and magnetic optical fields

le Feber, B., Rotenberg, N., Beggs, Daryl M. and Kuipers, L. 2014. Simultaneous measurement of nanoscale electric and magnetic optical fields. Nature Photonics 8 (1) , pp. 43-46. 10.1038/nphoton.2013.323

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Control of light–matter interactions at the nanoscale has advanced fields such as quantum optics1, photovoltaics2 and telecommunications3. These advances are driven by an improved understanding of the nanoscale behaviour of light, enabled by direct observations of the local electric fields near photonic nanostructures4, 5, 6. With the advent of metamaterials that respond to the magnetic component of light7, 8, schemes have been developed to measure the nanoscale magnetic field9, 10, 11, 12. However, these structures interact not only with the magnetic field, but also with the electric field of light. Here, we demonstrate the essential simultaneous detection of both electric and magnetic fields with subwavelength resolution. By explaining our measurements through reciprocal considerations, we create a route towards designing probes sensitive to specific desired combinations of electric and magnetic field components. Simultaneous access to nanoscale electric and magnetic fields will pave the way for new designs of optical nanostructures and metamaterials.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Publisher: Nature Publishing Group
ISSN: 1749-4885
Date of First Compliant Deposit: 2 June 2017
Date of Acceptance: 31 October 2013
Last Modified: 12 Jul 2017 04:08

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