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SUMMARY:Plasmonics in the sub-nanometre and quantum domains - Prof. Jeremy
  J. Baumberg\, FRS\, Cavendish Laboratory\, University of Cambridge
DTSTART:20131107T150000Z
DTEND:20131107T160000Z
UID:TALK48433@talks.cam.ac.uk
CONTACT:Dr. Jonathan D. Mar
DESCRIPTION:Coupling between plasmonic nano-components generates strongly 
 red-shifted resonances combined with intense local field amplification on 
 the nanoscale. In recent years we have explored plasmonic coupling combine
 d with soft materials to tune this interaction dynamically\, and to work i
 n the strong coupling domain for gaps below 1nm which can be formed reliab
 ly by bottom-up self-assembly. At these distances\, coupled dipoles are no
 t sufficient to describe the response\, and the system is described in ter
 ms of gap plasmons. The crucial aspect of these systems is the extreme sen
 sitivity to separation\, and how quantum tunnelling starts to play an infl
 uence that can be directly seen at room temperature in ambient conditions.
  We recently demonstrated how quantum plasmonics controls the very smalles
 t space that light can be squeezed into. We now show how graphene is the s
 mallest possible spacer of 0.3nm in a plasmonic dimer\, and allows active 
 tuning of the plasmonic modes.\n\n[1] Nature 491\, 574 (2012)\; Revealing 
 the quantum regime in tunnelling plasmonics\, [2] Nano Letters 10\, 1787 (
 2010)\; Actively-Tuned Plasmons on Elastomeric Au NP Dimers\, [3] ACS Nano
  5\, 3878 (2011)\; Precise sub-nm plasmonic junctions within Au NP assembl
 ies\, [4] Nano Letters  (2013)\; DOI 10.1021/nl4018463\; Controlling Sub-n
 m Gaps in Plasmonic Dimers using Graphene\n
LOCATION:Microelectronics Seminar Room (located on 2nd floor)\, Cavendish 
 Laboratory
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