Bidimensional planar micro-optics for optochemical absorbance sensing
Garcés, I. (Universidad de Zaragoza. Departamento de Ingeniería Electrónica y Comunicaciones)
Villuendas, F. (Universidad de Zaragoza. Departamento de Física Aplicada)
Subías, J. (Universidad de Zaragoza. Departamento de Física Aplicada)
Alonso Chamarro, Julián (Universitat Autònoma de Barcelona. Departament de Química)
Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
Dominguez, Carlos (Centro Nacional de Microelectrónica)
Bartolomé Porcar, María Elena (Centro Nacional de Microelectrónica)

Date:	1998
Abstract:	A new approach for developing optochemical absorbance sensors is presented. The method is based on a planar micro-optic circuit in which an optochemically active membrane that responds to selective compounds is deposited in the device, yielding a part of the guiding planar structure. In this way the optical field is confined in the direction transverse to the substrate and controlled in the lateral direction by means of planar micro-optics components. High sensitivity of the device can be easily obtained because of the relatively long light paths through the membrane, and the response time is low because the analyte has to diffuse through a several-micrometer-thin membrane. Experimental results of measurements of the concentration of potassium are also presented to verify the possibilities of these devices as specific absorbance sensors.
Note:	Altres ajuts: CICYT/TIC93-0525
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Òptica
Published in:	Optics letters, Vol. 23, No. 3 (1 February 1998) , p. 225-227, ISSN 0146-9592

DOI: 10.1364/OL.23.000225

3 p, 547.6 KB

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