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SUMMARY:New Photovoltaic and Plasmonic Avenues to Amplify Light Matter Int
 eraction at the Atomic Scale - Dr. Arindam Ghosh\, Associate Professor\, D
 epartment of Physics\, Indian Institute of Science (IISc) Bangalore
DTSTART:20151015T130000Z
DTEND:20151015T140000Z
UID:TALK60952@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:The enormous impact of graphene on both fundamental science an
 d potential device applications has rejuvenated interest in other layered 
 materials as well\, where individual atomic or molecular layers interact w
 eakly through the Van der Waals force. Unfortunately\, in spite of great p
 romise in electronic applications\, most of these materials couple weakly 
 to electromagnetic radiation when their thickness is reduced to atomic or 
 molecular scales\, and hence much of their optical or opto-electronic capa
 bilities remain unexploited. Here\, we will describe some of the recent br
 eakthroughs in sensitizing atomically thin membranes\, in particular graph
 ene\, to electromagnetic radiation. Two specific technologies will be disc
 ussed in detail. First\, a photovoltaic route involving multi-component tw
 o-dimensional hybrids obtained via vertical stacking of different layered 
 materials will be described in detail. We will show how such hybrid hetero
 structures of atomically thin membranes with clean interfaces promise devi
 ces that combine advantages of ultimate miniaturization and multiple opto-
 electronic functionality. In the second part of the talk\, a novel nanopla
 smonic route with vertically stacked graphene - metal nanoparticle dimers 
 will be demonstrated\, which emerges as a highly promising platform for hi
 gh speed color-selective photo detection.
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory\, Department of Ph
 ysics
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