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SUMMARY:Probing Non-Equilibrium Dynamics in Energy Materials with Extreme 
 Spatio-Temporal Resolution -  Dr Akshay Rao\, EPSRC Early Career Fellow\, 
 Winton Advanced Research Fellow\, Cavendish Laboratory
DTSTART:20181102T143000Z
DTEND:20181102T153000Z
UID:TALK114325@talks.cam.ac.uk
DESCRIPTION:The interaction of light with matter is fundamental to the ope
 ration of a range of devices such as solar cells\, LEDs\, photocatalytic\,
  plasmonic and many QI systems. For over 30 years\, ultrafast spectroscopy
  has served as the key tool to understand the dynamics of the quasiparticl
 es mediating light-matter interaction such as excitons\, polarons and pola
 ritons. However\, to date\, ultrafast spectroscopies were designed and lar
 gely applied to species dissolved in liquids or homogeneous bulk solids. T
 he advent of nanoscience and thin films materials with nanoscale inhomogen
 eity and disorder has rendered these ensemble-based methods inadequate and
  they continue to be used largely because of a lack of alternatives\, rath
 er than being particularly suited to address the questions of interest. In
  this talk I will present first results from a new experimental platform c
 ombining unprecedented spatial\, temporal\, spectral and vibronic sensitiv
 ity. This allows us to follow the dynamics and motion of charges\, exciton
 s\, polaritons and other quasiparticles down to 10nm length scales with 10
 fs time resolution\, while providing few nm spectral resolution as well as
  information about the coupling between electronic and nuclear degrees of 
 freedom in the system. I will highlight unexpected results including ultra
 fast long-range motion of photoexcitations in 2D semiconductors\, organic 
 molecules and hybrid organic-inorganic systems and how these may be harnes
 sed in novel devices.
LOCATION:Small Lecture Theatre\, Bragg Building\, Cavendish Laboratory (Ph
 ysics Department)
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