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Single Nanoparticle Detection using on-chip Notched Ring Resonator

Published online by Cambridge University Press:  07 March 2011

S. Wang  and
Y. Yi
S. Wang
Affiliation:
Massauchusetts Institute of Technology, Cambridge, MA 02139
Y. Yi*
Affiliation:
Massauchusetts Institute of Technology, Cambridge, MA 02139 New York University, New York, NY 10012 CUNY Graduate Center, New York, NY 10016
*
*e-mail: [email protected]
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Abstract

A new photonic structure was demonstrated to achieve strong optical coupling between nanoparticle and photonic molecule by utilizing a notched micro ring resonators. By creating a notch in the ring resonator and putting a nanoparticle inside the notch, large spectral shifts and splittings at nm scale can be achieved, compared to only pm scale observed by fiber tip evanescently coupled to the surface of microsphere, thereby significantly lowered the quality factor requirement for single nanoparticle detection. The ability for sorting the type of nanoparticles due to very different mode shift and splitting behavior of dielectric and metallic nanoparticles is also emphasized.

Keywords

optical propertiesnanostructuresensor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1316: Symposium QQ – Nanofunctional Materials, Nanostructures and Nanodevices for Biomedical Applications II , 2011 , mrsf10-1316-qq06-25
Copyright
Copyright © Materials Research Society 2011

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