Title

Determination Of Electric-Field, Magnetic-Field, And Electric-Current Distributions Of Infrared Optical Antennas: A Near-Field Optical Vector Network Analyzer

Abstract

In addition to the electric field E(r), the associated magnetic field H(r) and current density J(r) characterize any electromagnetic device, providing insight into antenna coupling and mutual impedance. We demonstrate the optical analogue of the radio frequency vector network analyzer implemented in interferometric homodyne scattering-type scanning near-field optical microscopy for obtaining E(r), H(r), and J(r). The approach is generally applicable and demonstrated for the case of a linear coupled-dipole antenna in the midinfrared spectral region. The determination of the underlying 3D vector electric near-field distribution E(r) with nanometer spatial resolution and full phase and amplitude information is enabled by the design of probe tips with selectivity with respect to E and E fabricated by focused ion-beam milling and nano-chemical-vapor-deposition methods. © 2010 The American Physical Society.

Publication Date

10-15-2010

Publication Title

Physical Review Letters

Volume

105

Issue

16

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.105.167403

Socpus ID

77958119104 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77958119104

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