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Ultrafast relaxation dynamics of hot optical phonons in graphene Haining Wang,1,a
 

Summary: Ultrafast relaxation dynamics of hot optical phonons in graphene
Haining Wang,1,a
Jared H. Strait,1
Paul A. George,1
Shriram Shivaraman,1
Virgil B. Shields,1
Mvs Chandrashekhar,1
Jeonghyun Hwang,1
Farhan Rana,1
Michael G. Spencer,1
Carlos S. Ruiz-Vargas,2
and Jiwoong Park2
1
School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA
2
Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
Received 23 September 2009; accepted 19 December 2009; published online 26 February 2010
Using ultrafast optical pump-probe spectroscopy, we study the relaxation dynamics of hot optical
phonons in few-layer and multilayer graphene films grown by epitaxy on silicon carbide substrates
and by chemical vapor deposition on nickel substrates. In the first few hundred femtoseconds after

  

Source: Afshari, Ehsan - School of Electrical and Computer Engineering, Cornell University

 

Collections: Engineering