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Extreme resolution nanophotonics


Project Description

Recent progress in strong confinement and enhancement of light has allowed researchers to‭ ‬detect signals from single molecules close to nano-particles and is also investigated intensively as a way to optically transport and store information in extremely small regions.‭ ‬Characteristic optical behaviours of nanostructures are of great significance,‭ ‬not only for basic physical science but also as fundamentals for novel technologies in the environmental,‭ ‬medical,‭ ‬biological,‭ ‬and information sciences.‭ ‬

This project is part of a new collaboration with the experimental group of Prof H.‭ ‬Okamoto ‬at the Institute for Molecular Science (Japan‭) and will involve visits to that group. We want to combine our newly developed theoretical framework‭ with our partner's nano-optical experiments‭, ‬to understand and control the fundamental light-particle interaction processes.‭ ‬This will open the way to new applications and reliable devices for sub-wavelength information processing,‭ ‬enhanced photochemical processes and spectroscopic analysis.

The response of a particles to light is similar to the playing of a musical instrument‭ ‬-‭ ‬they have intrinsic resonant modes‭ ‬characteristic of the particle‭ (‬corresponding to the instrument‭) ‬but the emitted waves depend on the specific way energy is applied‭ (‬by whom and how it is played‭)‬.‭ ‬There are many computational methods to calculate the response of nanoparticles to applied light,‭ ‬but none is explicitly based on the concept of these modes (or can provide a clear framework to understand how the response varies with the incident field).‭ ‬This project uses a new theoretical method‭, which ‬can provide this information‭, ‬and is ideally matched by our experimental partner's ability to image light extremely close to nanoparticle surfaces.‭ ‬Together we will visualize, identify and control the nanoscale resonant and non-resonant modes underpinning the optical behaviour of nanoparticles‭.

This project should appeal to enthusiastic candidates with backgrounds in theoretical and computational physical science. Much of the day-to-day work of this project will involve applying concepts of advanced electromagnetism to modeling and computational simulations. Programming skills, while useful, are not a necessary prerequisite.

References

Geometrical Mie theory for resonances in nanoparticles of any shape
F. Papoff and B. Hourahine
Optics Express, Vol. 19, Issue 22, pp. 21432-21444 (2011)
http://dx.doi.org/10.1364/OE.19.021432

How good is research at University of Strathclyde in Physics?

FTE Category A staff submitted: 27.00

Research output data provided by the Research Excellence Framework (REF)

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