Spiral-path high-sensitivity silicon photonic wire molecular sensor with temperature-independent response.
Opt Lett
; 33(6): 596-8, 2008 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-18347721
ABSTRACT
We demonstrate a new silicon photonic wire waveguide evanescent field (PWEF) sensor that exploits the strong evanescent field of the transverse magnetic mode of this high-index-contrast, submicrometer-dimension waveguide. High sensitivity is achieved by using a 2 mm long double-spiral waveguide structure that fits within a compact circular area of 150 microm diameter, facilitating compatibility with commercial spotting apparatus and the fabrication of densely spaced sensor arrays. By incorporating the PWEF sensor element into a balanced waveguide Mach-Zehnder interferometer circuit, a minimum detectable mass of approximately 10 fg of streptavidin protein is demonstrated with near temperature-independent response.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Silicio
/
Técnicas Biosensibles
/
Óptica y Fotónica
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Opt Lett
Año:
2008
Tipo del documento:
Article