R Ramjit’s scientific contributions

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Publications (1)


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Fig. 4 The inter-relationship between the WGM model and the Photonic Atom Model for a microsphere having a uniform refractive index. 
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MicroParticle photophysics illuminates viral bio-sensing
  • Article
  • Full-text available

February 2008

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258 Reads

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102 Citations

Faraday Discussions

S Arnold

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R Ramjit

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The authors present an approach for specific and rapid unlabeled detection of a virus by using a microsphere-based whispering gallery mode sensor that transduces the interaction of a whole virus with an anchored antibody. They show theoretically that this sensor can detect a single virion below the mass of HIV. A micro-fluidic device is presented that enables the discrimination between viruses of similar size and shape.

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Citations (1)


... Some phenomena can be grasped with effective medium approach -as we show below, while an exact solution to the problem remains out of reach for now. However, to grasp/visualize the resonance properties of a spherical cavity, it turns out sufficient to consider a 2D model of a circular resonator [38] -see Fig. 6 (compare Fig. 5). Thus, the intensity of radiation (light) at the circumference of a spherical cavity (homogeneous droplet) in the equatorial plane can be simplistically described as an intra-cavity standing wave: ...

Reference:

Up-Converting Luminescent Nanoparticles as Probes of Surface Dynamics in Single Evaporating Microdroplets of Suspension
MicroParticle photophysics illuminates viral bio-sensing

Faraday Discussions