Detectivity comparison of bolometric optical antennas

Alexander Cuadrado; José M. López-Alonso; Juan C. Martínez-Antón; Jose M. Ezquerro; Francisco J. González; Javier Alda

doi:10.1117/12.2187926

28 August 2015 Detectivity comparison of bolometric optical antennas

Alexander Cuadrado, José M. López-Alonso, Juan C. Martínez-Antón, Jose M. Ezquerro, Francisco J. González, Javier Alda

Proceedings Volume 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII; 954735 (2015) https://doi.org/10.1117/12.2187926
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

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.

Citation Download Citation

Alexander Cuadrado, José M. López-Alonso, Juan C. Martínez-Antón, Jose M. Ezquerro, Francisco J. González, and Javier Alda "Detectivity comparison of bolometric optical antennas", Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 954735 (28 August 2015); https://doi.org/10.1117/12.2187926

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