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Title: Ultrafast Thermal Transport at Interfaces

Our research program on Ultrafast Thermal Transport at Interfaces advanced understanding of the mesoscale science of heat conduction. At the length and time scales of atoms and atomic motions, energy is transported by interactions between single-particle and collective excitations. At macroscopic scales, entropy, temperature, and heat are the governing concepts. Key gaps in fundamental knowledge appear at the transitions between these two regimes. The transport of thermal energy at interfaces plays a pivotal role in these scientific issues. Measurements of heat transport with ultrafast time resolution are needed because picoseconds are the fundamental scales where the lack of equilibrium between various thermal excitations becomes a important factor in the transport physics. A critical aspect of our work has been the development of experimental methods and model systems that enabled more precise and sensitive investigations of nanoscale thermal transport.
Authors:
 [1] ;  [1] ;  [1]
  1. Univ. of Illinois, Champaign, IL (United States)
Publication Date:
OSTI Identifier:
1160069
Report Number(s):
DOE-IL--46459-1
DOE Contract Number:
FG02-07ER46459
Resource Type:
Technical Report
Research Org:
Univ. of Illinois, Champaign, IL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE