Title

Near-field mapping of dipole nano-antenna-coupled bolometers

Authors

Authors

E. Tucker; J. D' Archangel; M. Raschke; E. Briones; F. J. Gonzalez;G. Boreman

Comments

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Abbreviated Journal Title

J. Appl. Phys.

Keywords

TAPERED TRANSMISSION-LINES; OPTICAL MICROSCOPY; SCATTERING; MODES; INTERFERENCE; PROPAGATION; CONSTANTS; AMPLITUDE; Physics, Applied

Abstract

The near-field characteristics of single, double, and arrays of connected dipole nano-antennas coupled to bolometers were studied by infrared scattering scanning near-field optical microscopy (s-SNOM) and analyzed by numerical simulations. Results were consistent with classical antenna theory showing the expected pi phase difference across the terminals of the dipoles. However, according to the observed differences between the measurements and simulations, the symmetry of the amplitude signal appeared to be sensitive with respect to the position of the bolometric element relative to the dipoles. The effect of the position of the bolometer on the associated near-field distribution suggests an influence on the coupling and efficiency of energy transfer into these detectors, which could be important for determining tolerances in the fabrication of such devices. These results show how near-field measurements in general can provide critical information to guide the design of nano-antennas, nano-antenna-phased arrays, and integrated photonic devices. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

Journal Title

Journal of Applied Physics

Volume

114

Issue/Number

3

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

7

WOS Identifier

WOS:000322202700009

ISSN

0021-8979

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