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Proceedings Paper

Detectivity comparison of bolometric optical antennas
Author(s): Alexander Cuadrado; José M. López-Alonso; Juan C. Martínez-Antón; Jose M. Ezquerro; Francisco J. González; Javier Alda
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Paper Abstract

The practical application of optical antennas in detection devices strongly depends on its ability to produce an acceptable signal-to-noise ratio for the given task. It is known that, due to the intrinsic problems arising from its sub-wavelength dimensions, optical antennas produce very small signals. The quality of these signals depends on the involved transduction mechanism. The contribution of different types of noise should be adapted to the transducer and to the signal extraction regime. Once noise is evaluated and measured, the specific detectivity, D*, becomes the parameter of interest when comparing the performance of antenna coupled devices with other detectors. However, this parameter involves some magnitudes that can be defined in several ways for optical antennas. In this contribution we are interested in the evaluation and comparison of D_ values for several bolometric optical antennas working in the infrared and involving two materials. At the same time, some material and geometrical parameters involved in the definition of noise and detectivity will be discussed to analyze the suitability of D_ to properly account for the performance of optical antennas.

Paper Details

Date Published: 28 August 2015
PDF: 9 pages
Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 954735 (28 August 2015); doi: 10.1117/12.2187926
Show Author Affiliations
Alexander Cuadrado, Univ. Complutense of Madrid (Spain)
Institute of Optics, CSIC (Spain)
José M. López-Alonso, Univ. Complutense of Madrid (Spain)
Juan C. Martínez-Antón, Univ. Complutense of Madrid (Spain)
Jose M. Ezquerro, Univ. Complutense of Madrid (Spain)
Francisco J. González, Univ. Autónoma de San Luis Potosí (Mexico)
Javier Alda, Univ. Complutense of Madrid (Spain)

Published in SPIE Proceedings Vol. 9547:
Plasmonics: Metallic Nanostructures and Their Optical Properties XIII
Allan D. Boardman; Din Ping Tsai, Editor(s)

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