title: Integration of short gold nanoparticles chain on SOI waveguide toward compact integrated bio-sensors.
abstract: We demonstrate the integration of short metal nanoparticle chains (L ≈700 nm) supporting localized surface plasmons in Silicon On Insulator (SOI) waveguides at telecom wavelengths. Nanoparticles are deposited on the waveguide top and excited through the evanescent field of the TE waveguide modes. Finite difference time domain calculations and waveguide transmission measurements reveal that almost all the TE mode energy can be transferred to nanoparticle chains at resonance. It is also shown that the transmission spectrum is very sensitive to the molecular environment of nanoparticles, thus opening the way towards ultra-compact sensors in guided plasmonics on SOI. An experimental demonstration is reported with octadecanthiol molecules for a detection volume as small as 0.26 attoliter.
authors.affiliation: Institut d’Electronique Fondamentale, Univ. Paris Sud, UMR8622 CNRS, 91405 Orsay, France .
authors.forename: Mickaël
authors.initials: M
authors.lastname: Février
authors.forename: Philippe
authors.initials: P
authors.lastname: Gogol
authors.forename: Grégory
authors.initials: G
authors.lastname: Barbillon
authors.forename: Abdelhanin
authors.initials: A
authors.lastname: Aassime
authors.forename: Robert
authors.initials: R
authors.lastname: Mégy
authors.forename: Bernard
authors.initials: B
authors.lastname: Bartenlian
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Lourtioz
authors.forename: Béatrice
authors.initials: B
authors.lastname: Dagens
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D003198:Computer Simulation; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009716:Numerical Analysis, Computer-Assisted; D012825:Silicon / Q000737:chemistry*; D013997:Time Factors
chemical_list: D006046:Gold; D012825:Silicon