Magnetic Dipole Scattering from Metallic Nanowire for Ultrasensitive Deflection Sensing

Title

Magnetic Dipole Scattering from Metallic Nanowire for Ultrasensitive Deflection Sensing

 Author

Xi, Z. (TU Delft ImPhys/Optics)
Urbach, Paul (TU Delft ImPhys/Optics)

Date

2017-08-01

 Abstract

It is generally believed that when a single metallic nanowire is sufficiently small, it scatters like a point electric dipole. We show theoretically when a metallic nanowire is placed inside specially designed beams, the magnetic dipole contribution along with the electric dipole resonance can lead to unidirectional scattering in the far field, fulfilling Kerker’s condition. Remarkably, this far-field unidirectional scattering encodes information that is highly dependent on the nanowire’s deflection at a scale much smaller than the wavelength. The special roles of small but essential magnetic response along with the plasmonic resonance are highlighted for this extreme sensitivity as compared with the dielectric counterpart. In addition, the same essential role of the magnetic dipole contribution is also presented for a very small metallic nanosphere.

 To reference this document use:

http://resolver.tudelft.nl/uuid:3ba1ba00-2012-4481-80aa-a2d9d98a49d5

 DOI

https://doi.org/10.1103/PhysRevLett.119.053902

 ISSN

0031-9007

 Source

Physical Review Letters, 119 (5), 1-5

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2017 Z. Xi, Paul Urbach
Files
PDF PhysRevLett.119.053902_1.pdf 958.79 KB
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