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Dr. Mohamed Ameen Poyli

Ph.D

Research Assistant Professor


Dr. Mohamed Ameen Poyli joined as Research Assistant Professor in the Department of Physics and Nanotechnology at SRM University in June 2016. He graduated with Doctor of Philosophy degree in Physics from The University of the Basque Country (UPV/EHU), San Sebastian, Spain. During PhD period, he was involved in theoretical and computational study of optical response of novel nanomaterials. In this period, he worked in the Theory of Nanophotonics Group at the Center for Materials Physics (CFM) and in Donostia International Physics Center (DIPC) at San Sebastian. Dr. Poyli has a master degree in Physics from the Bharathidasan University, Tiruchirappalli, India and a masters in Nanoscience from The Universityof the Basque Country, San Sebastian, Spain. 


My research involves theoretical modelling of the optical response nanostructures of various novel materials for the purpose of optimizing their response towards electromagnetic radiation. For this purpose, I use standard Maxwell’s solvers for numerical simulations and Matlab and similar softwares for the implementation of analytical expressions. I focus on the following topics:

  1. Exploring magnetic response of Silicon nanoparticles: Silicon is a purely non magnetic dielectric material. But when illuminated with plane wave, nanoparticles of silicon show strong magnetic and electric response as a result of polarization currents inside the particle. I would like to explore the magnetic response of silicon particles for coupling their resonances with transitions in magnetically active samples. This will help to explore the possibility of using silicon nanoparticles for performing field enhanced spectroscopy of materials that show magnetic transitions in the optical regime. This needs the optimization of the field enhancement as well as antenna properties of silicon nanostructures.

Since silicon is a widely used material in photonic applications, the study of interplay of electric and magnetic resonances as well as their coupling with electric and magnetic transitions in material would find applications in various fields of silicon photonics like solar light harvesting, perfect absorbing materials, etc.

  1. Two-dimensional Nanophotonic materials: Materials like graphene and topological insulators support collective oscillation of two dimensional electrons called surface plasmons. Unlike other materials, plasmons in two-dimensional systems are extremely confined and tunable by means of external voltage and/or doping. Moreover, in the case of topological insulators, we can induce collective spin oscillations by means of a plane wave illumination or by using a localized source such as an electric or magnetic dipole.

I am interested in the optical excitation of collective electric and magnetic oscillations in Topological Insulator nanostructures. I also study the optimization of the response of two-dimensional nanostructures for efficient coupling of the collective modes with localized emitters. Coupling of these collective modes with electric and magnetic transitions in materials will allow for the selective probing of the transitions in the terahertz regime of electromagnetic spectrum. Probing of these transitions are of extreme interest as many molecules and materials has characteristic energy levels in the terahertz regime of the spectrum.

 


To be updated


  • Low-loss electric and magnetic field-enhanced spectroscopy with subwavelength silicon dimers, P. Albella, M. Ameen Poyli, M.K. Schmidt, S.A. Maier, F. Moreno , J.J. Sáenz , and J. Aizpurua, Journal of Physics Chemistry C 117, 13573 (2013).
  • Optical excitation of acoustic surface plasmons in metallic nanoparticles, M. Hrton, M. Ameen Poyli, V.M. Silkin, and J. Aizpurua, Annalen der Physik 524, 751 (2012)
  • Multiscale theoretical modeling of plasmonic sensing of hydrogen uptake in palladium nanodisks, M. Ameen Poyli, V. M. Silkin, I. P. Chernov, P. M. Echenique, R. Díez Muiño, and J. Aizpurua, Journal of Physical Chemistry Letters 3, 2556 (2012)
  • Detection of deep-subwavelength dielectric layers at terahertz frequencies using semiconductor plasmonic resonators,Audrey Berrier, Pablo Albella, M. Ameen Poyli, Ronald Ulbricht, Mischa Bonn, Javier Aizpurua, and Jaime Gomez Rivas, Optics Express 20, 5052 (2012)
  • Infrared phononic antennas: Localized surface phonon polaritons in SiC disks, M. Ameen, A. Garcia-Etxarri, M. Schnell, R. Hillenbrand, and J. Aizpurua, Chin. Sci. Bull. 55, 2625-2628 (2010). 

 

 

 

 


  • Physics for Engineers (BTech)
  • Electromagnetic Theory (MSc Physics)

Positions are available.
Basic knowledge in electrodynamics and computer programming is desirable.
(To be updated)

Contact:
Dr. Mohamed Ameen,
Research Assistant Professor,
Department of Physics and Nanotechnology,
Room-33, 13th floor, Central library building,
SRM University, Kattankulathur -603203.
Email: mohamedameen.p@ktr.srmuniv.ac.in