A theoretical comparison of strip and vertical slot-waveguide

Alvarez, Jesús and Vivien, Laurent and Marris-Morini, Delphine and Angulo Barrios, Carlos and Hill, Daniel (2008). A theoretical comparison of strip and vertical slot-waveguide. In: "Trends in Nanotechnology (TNT), 2008", 01/09/2008-05/09/2008, Oviedo, España.


Title: A theoretical comparison of strip and vertical slot-waveguide
  • Alvarez, Jesús
  • Vivien, Laurent
  • Marris-Morini, Delphine
  • Angulo Barrios, Carlos
  • Hill, Daniel
Item Type: Presentation at Congress or Conference (Poster)
Event Title: Trends in Nanotechnology (TNT), 2008
Event Dates: 01/09/2008-05/09/2008
Event Location: Oviedo, España
Title of Book: Proceedings of the International Conference Trends in Nanotechnology 2008
Date: 2008
Faculty: Facultad de Ciencias de la Actividad Física y del Deporte (INEF) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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For biosensing applications where small refractive index variations of the surrounding medium are monitored, light needs to have a strong interaction with such a surrounding biological medium. This is not the case for classical rib and strip waveguides where light is predominantly guided in the high index material. However, in slot waveguides, light is confined in a low index slot region sandwiched between two high index rails and due to the discontinuity of the electric field at the interface between the rails and slot, a significant fraction of the electromagnetic field is localized in the slot. As such slot waveguides present an interesting alternative for biosensing applications especially when made using silicon nitride which permits slot widths of up to 200nm and as such reachable fabrication tolerances, and reduced propagation losses compared to silicon slot waveguides with its higher refractive index contrast. Furthermore, for biosensing, the wider slot facilitates sample transport and using a multiple-slot structure, further enhancement of the optical confinement in low index slot regions is possible. In this paper we present work in progress of theoretical modeling for strip, slot and multiple-slot waveguides and compare their characteristics for sensing purposes.

More information

Item ID: 4144
DC Identifier: https://oa.upm.es/4144/
OAI Identifier: oai:oa.upm.es:4144
Official URL: http://tntconf.org/2008/posters.php?conf=08
Deposited by: Memoria Investigacion
Deposited on: 17 Sep 2010 09:22
Last Modified: 20 Apr 2016 13:28
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