Sensitivity analysis for improving nanomechanical photonic transducers biosensors
Fariña, David (Institut Català de Nanociència i Nanotecnologia)
Alvarez, Mar (Institut Català de Nanociència i Nanotecnologia)
Márquez, Salomón (Institut Català de Nanociència i Nanotecnologia)
Dominguez, Carlos (Institut de Microelectrònica de Barcelona)
Lechuga, Laura M (Institut Català de Nanociència i Nanotecnologia)

Date:	2015
Abstract:	The achievement of high sensitivity and highly integrated transducers is one of the main challenges in the development of high-throughput biosensors. The aim of this study is to improve the final sensitivity of an opto-mechanical device to be used as a reliable biosensor. We report the analysis of the mechanical and optical properties of optical waveguide microcantilever transducers, and their dependency on device design and dimensions. The selected layout (geometry) based on two butt-coupled misaligned waveguides displays better sensitivities than an aligned one. With this configuration, we find that an optimal microcantilever thickness range between 150 nm and 400 nm would increase both microcantilever bending during the biorecognition process and increase optical sensitivity to 4. 8 × 10⁻² nm⁻¹, an order of magnitude higher than other similar opto-mechanical devices. Moreover, the analysis shows that a single mode behaviour of the propagating radiation is required to avoid modal interference that could misinterpret the readout signal.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-624
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Published in:	Journal of Physics D: Applied Physics, Vol. 48, Issue 33 (August 2015) , art. 335401, ISSN 1361-6463

DOI: 10.1088/0022-3727/48/33/335401

Preprint 14 p, 8.6 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles