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Real-Time Detection of Staphylococcus Aureus Using Whispering Gallery Mode Optical Microdisks.

Author(s): Ghali H, Chibli H, Nadeau JL, Bianucci P, Peter YA

Biosensors (Basel). 2016 May 03;6(2):20 Authors: Ghali H, Chibli H, Nadeau JL, Bianucci P, Peter YA

Article GUID: 27153099
The effect of cation doping on the morphology, optical and structural properties of highly oriented wurtzite ZnO-nanorod arrays grown by a hydrothermal method.

Author(s): Hassanpour A, Guo P, Shen S, Bianucci P

Nanotechnology. 2017 Oct 27;28(43):435707 Authors: Hassanpour A, Guo P, Shen S, Bianucci P

Article GUID: 28786398
Linking plasma formation in grapes to microwave resonances of aqueous dimers.

Author(s): Khattak HK, Bianucci P, Slepkov AD

Proc Natl Acad Sci U S A. 2019 Feb 19;: Authors: Khattak HK, Bianucci P, Slepkov AD

Article GUID: 30782800
Title:Linking plasma formation in grapes to microwave resonances of aqueous dimers.
Authors:Khattak HK,  Bianucci P,  Slepkov AD
Link:https://www.ncbi.nlm.nih.gov/pubmed/30782800?dopt=Abstract
Category:Proc Natl Acad Sci U S A
PMID:30782800
Dept Affiliation: PHYSICS
1 Department of Physics and Astronomy, Trent University, Peterborough, ON, Canada K9L 0G2.
2 Department of Physics, Concordia University, Montreal, QC, Canada H4B 1R6.
3 Department of Physics and Astronomy, Trent University, Peterborough, ON, Canada K9L 0G2; aaronslepkov@trentu.ca.

Description:

Linking plasma formation in grapes to microwave resonances of aqueous dimers.

Proc Natl Acad Sci U S A. 2019 Feb 19;:

Authors: Khattak HK, Bianucci P, Slepkov AD

Abstract

The sparking of cut grape hemispheres in a household microwave oven has been a poorly explained Internet parlor trick for over two decades. By expanding this phenomenon to whole spherical dimers of various grape-sized fruit and hydrogel water beads, we demonstrate that the formation of plasma is due to electromagnetic hotspots arising from the cooperative interaction of Mie resonances in the individual spheres. The large dielectric constant of water at the relevant gigahertz frequencies can be used to form systems that mimic surface plasmon resonances that are typically reserved for nanoscale metallic objects. The absorptive properties of water furthermore act to homogenize higher-mode profiles and to preferentially select evanescent field concentrations such as the axial hotspot. Thus, beyond providing an explanation for a popular-science phenomenon, we outline a method to experimentally model subwavelength field patterns using thermal imaging in macroscopic dielectric systems.

PMID: 30782800 [PubMed - as supplied by publisher]