Profile
Overview
Kishan Menghrajani did his Ph.D. under Professor Bill Barnes and professor Geoff Nash in the Centre for Doctoral Training(CDT) in Metamaterials at University of Exeter, and his PhD project was entitled 'Strong Coupling of Molecular Vibrational Resonances’.
He is currently working as Postdoctrol Research Fellow under Professor Bill Barnes on a collaborative project with the Chemistry Department at Sheffield University, to explore the use of strong coupling of pigment molecules. This post-doc project is sponsored by The Leverhulme Trust.
He is an active member of Physics inclusivity working group.
Personal Website: kishanmenghrajani.info
Postdoctoral Research Fellow 2019- date
P.I. Professor Bill Barnes, University of Exeter
Professor Graham Leggett, University of Sheffield
Ph.D. (Physics) 2015-2019
Physics (Metamaterials), University of Exeter
P.I. Professor Bill Barnes
Professor Geoff Nash
Project Associate 2013-2015
Computational Photonics, Indian Institute of Science
P.I. Associate Professor Murugesan Venkatapathi
Honours & Awards
International Exchange grant, PI, 2022-2023, Royal Society
International Ph.D. EPSRC studentship, 2015-2019, CDT Metamaterials, University of Exeter
Organizing committee member, IONS Conference, July 9-12, 2019, University of Exeter
Physics inclusively working group, Dec 2020- till date, University of Exeter
SPIE Exeter chapter Advisor 2021- till date
Merit scholarship in Masters, 2012-2013
Department of Science and Technology (DST) scholarship in Master, 2011-2013
Further information
PhD Project
Excitonics: an organic route to MetamaterialsSupervisors: Prof. Bill Barnes and Prof. Geoff Nash
Many electromagnetic metamaterials are based on metallic elements (meta-atoms) – they make use of the plasmonic modes these elements support. Metals are well suited to this purpose owing to the negative permittivity they possess. The plasmon modes associated with this negative permittivity have the important property that their associated electromagnetic fields are confined to volumes much smaller than the resonant (plasmon) wavelength; one can thus pack many plasmonic elements into a sub-wavelength volume, thereby enabling metamaterials to be made. Other materials may also exhibit negative permittivity – an interesting and little explored class of such materials are excitonic materials such as some dye-doped polymers. Here we will explore the use of such materials as a means to make metamaterials. We have already shown that nanostructures of dye-doped polymers may support localised (excitonic) electromagnetic modes (Nano Lett., 14, 2339 (2014)), enabling optical fields to be confined and enhanced in just the same way that metals afford through the (plasmonic) electromagnetic modes they support. This is a very new area – largely unexplored. We will investigate: how to nanostructure excitonic materials, look at the localised modes supported by these nanostructures, and then explore how these individual structures may be assembled so as to build metamaterials. The properties of these metamaterials will then be investigated, including multilayer structures and arrays of excitonic meta-atoms. In the latter stages of the project we may explore the possibility of assembling them from sustainable materials such as cellulose doped with naturally occurring dyes.
Book Review
Excitations in organic solids, by Vladimir M. Agranovich
Fibre-optic Fabry–Perot sensors: an introductionOutreach
Sidmouth science festival 2018
IONS Paris conference- OSA representative 2017
Sidmouth science festival 2017
Big bang south west 2016
Sidmouth science festival 2016
Selected Presentations
Vibrational strong coupling with surface plasmons and the presence of surface plasmon stop bands
Molecular Plasmonics 2019
Strong coupling of molecular vibrational resonances in a metal-clad microcavity below cut-off
Strong coupling between plasmonic and vibratonal resonances in the mid infrared range
Strong coupling between plasmonic and molecular vibrational resonances in a polymer
Poster PresentationsNanoMaterials conference - May 2017
Photonics conference- Dec 2016
Oversight board visit- Jan 2016
Startup Weekend
Startup weekend Exeter winners, November 2016
Startup weekend Exeter winners, June 2016