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Proceedings Paper

Optical sensors based on photonic crystal: a new route
Author(s): S. Romano; S. Torino; G. Coppola; S. Cabrini; V. Mocella
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Paper Abstract

The realization of miniaturized devices able to accumulate a higher number of information in a smallest volume is a challenge of the technological development. This trend increases the request of high sensitivity and selectivity sensors which can be integrated in microsystems. In this landscape, optical sensors based on photonic crystal technology can be an appealing solution. Here, a new refractive index sensor device, based on the bound states in the continuum (BIC) resonance shift excited in a photonic crystal membrane, is presented. A microfluidic cell was used to control the injection of fluids with different refractive indices over the photonic crystal surface. The shift of very high Q-factor resonances excited into the photonic crystal open cavity was monitored as a function of the refractive index n of the test liquid. The excellent stability we found and the minimal, loss-free optical equipment requirement, provide a new route for achieving high performance in sensing applications.

Paper Details

Date Published: 16 May 2017
PDF: 6 pages
Proc. SPIE 10231, Optical Sensors 2017, 102312J (16 May 2017); doi: 10.1117/12.2267224
Show Author Affiliations
S. Romano, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
S. Torino, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
G. Coppola, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
S. Cabrini, The Molecular Foundry (United States)
V. Mocella, Istituto per la Microelettronica e Microsistemi, CNR (Italy)

Published in SPIE Proceedings Vol. 10231:
Optical Sensors 2017
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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