Plasmonic Enhancement of WGM-Microcavity

Find the link for the article at www.mp3l.org

We describe and demonstrate a physical mechanism that substantially enhances the label-free
sensitivity of a whispering-gallery-mode biosensor for the detection of individual nanoparticles in
aqueous solution. It involves the interaction of dielectric nanoparticle in an equatorial carousel orbit
with a plasmonic nanoparticle bound at the microparticle's equator. As the dielectric particle parks
to hot spots on the plasmonic particle we observe frequency shifts that are enhanced by a factor of
4x, consistent with a simple reactive model. Once optimized the enhancement by this mechanism
should exceed several orders of magnitude, putting individual protein within reach.

Category:

Science & Technology

Tags:

• Mircoparticle
• Carousel
• Virus Detection
• Bio-sensing
• Bio-photonics
• Protein Detection
• WGM
• Whispering Gallery Mode
• Nanoparticle
• Gold Nanoparticle
• Plasmonics
• Plasmon

[mp3lwgm]

The cover referred to by truescience1 appeared on August 15, 2011, not on March 4th. Once again the comment by truescience1 is not true.

[mp3lwgm]

The last statement by truescience1 is in fact not true. The paper by M.A. Santiago-Cordoba, S.V. Boriskina, F. Vollmer and M.C. Demirel was published in Applied Physics Letters on August 11, 2011. The paper by S.I. Shopova, R. Rajmangal, S. Holler, and S. Arnold referenced in this YouTube presentation was published in the same journal on June 13, 2011.

[truescience1]

I found another article on this idea that was published earlier:

M.A. Santiago-Cordoba, S.V. Boriskina, F. Vollmer and M.C. Demirel “Plasmonic Nanoparticle-Based Protein Detection by Optical Shift of a Resonant Microcavity” Applied Physics Letters , 4 March (2011) COVER PAPER)