Special Section: Selected Papers from the 3rd Mediterranean Conference on Nanophotonics

Near-field enhancement for infrared sensor applications

[+] Author Affiliations
Juan José Sanz-Fernández

The University of Edinburgh, Scottish Microelectronics Centre, Institute for Integrated Systems, West Mains Road, Edinburgh, EH9 3JF, United Kingdomjuanjose.sanz.fernandez@gmail.com

Carolina Mateo-Segura

Queen Mary College, University of London, Antennas and Electromagnetics Group, Department of Electronic and Electrical Engineering, Mile End Road, London, E1 4NS, United Kingdom

Rebecca Cheung

The University of Edinburgh, Scottish Microelectronics Centre, Institute for Integrated Systems, West Mains Road, Edinburgh, EH9 3JF, United Kingdomjuanjose.sanz.fernandez@gmail.com

George Goussetis

Queen's University Belfast, Institute of Electronics Communications and Information Technology (ECIT), Northern Ireland, BT3 9DT, United Kingdom

Marc Desmulliez

Heriot-Watt University, Microsystems Engineering Centre (MISEC), Edinburgh, EH14 4AS, United Kingdom

J. Nanophoton. 5(1), 051814 (July 01, 2011). doi:10.1117/1.3604785
History: Received February 02, 2011; Revised June 04, 2011; Accepted June 07, 2011; Published July 01, 2011; Online July 01, 2011
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A detailed investigation on planar two dimensional metallodielectric dipole arrays with enhanced near-fields for sensing applications was carried out. Two approaches for enhancing the near-fields and increasing the quality factor were studied. The reactive power stored in the vicinity of the array at resonance increases rapidly with increasing periodicity. Higher quality factors are produced as a result. The excitation of the odd mode in the presence of a perturbation gives rise to a sharp resonance with near-field enhanced by at least an order of magnitude compared to unperturbed arrays. The trade-off between near-field enhancement and thermal losses was also studied, and the effect of supporting dielectric layers on thermal losses and quality factors were examined. Secondary transmissions due to the dielectric alone were found to enhance and reduce cyclically the quality factor as a function of the thickness of the dielectric material. The performance of a perturbed frequency selective surface in sensing nearby materials was investigated. Finally, unperturbed and perturbed arrays working at infrared frequencies were demonstrated experimentally.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Juan José Sanz-Fernández ; Carolina Mateo-Segura ; Rebecca Cheung ; George Goussetis and Marc Desmulliez
"Near-field enhancement for infrared sensor applications", J. Nanophoton. 5(1), 051814 (July 01, 2011). ; http://dx.doi.org/10.1117/1.3604785


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