Light Intensity Enhancement Inside the Grooves of Metallic Grating

Llopis, Francisco and Tobías Galicia, Ignacio and Jakas, Mario M. (2010). Light Intensity Enhancement Inside the Grooves of Metallic Grating. "Journal of the Optical Society of America B: Optical Physics", v. 27 (n. 10); pp. 1998-2006. ISSN 0740-3224. https://doi.org/10.1364/JOSAB.27.001998.

Description

Title: Light Intensity Enhancement Inside the Grooves of Metallic Grating
Author/s:
  • Llopis, Francisco
  • Tobías Galicia, Ignacio
  • Jakas, Mario M.
Item Type: Article
Título de Revista/Publicación: Journal of the Optical Society of America B: Optical Physics
Date: October 2010
ISSN: 0740-3224
Volume: 27
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Light absorption inside the grooves of metallic gratings filled with a semiconductor material can be improved by means of the electric field enhancement. To this end, the influence of grating dimensions in the electric field spectral behavior is theoretically investigated. Two conditions of cavity resonance have been analyzed separately: (1) for TE polarization (electric field parallel to the grooves) and (2) for TM polarization (magnetic field parallel to the grooves). When dimensions are chosen according to the first condition, the enhancement of TE fields is found to increase with the height-to-width ratio, and it is accompanied with a decrease in the bandwidth. The same enhancement levels can be achieved for TM fields if the second condition holds, provided that the period-to-width ratio is large enough. The simultaneous enhancement of TE and TM fields, based on a condition of surface resonance excitation, can also be accomplished. In this case, the TM response is very sensitive to changes in groove depth and width.

More information

Item ID: 8083
DC Identifier: http://oa.upm.es/8083/
OAI Identifier: oai:oa.upm.es:8083
DOI: 10.1364/JOSAB.27.001998
Official URL: http://www.opticsinfobase.org/abstract.cfm?URI=josab-27-10-1998
Deposited by: Memoria Investigacion
Deposited on: 18 Aug 2011 09:41
Last Modified: 20 Apr 2016 16:59
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