Title :
Microscopic origins of the terahertz carrier relaxation and cooling dynamics in graphene
Author :
Mihnev, Momchil T. ; Divin, Charles J. ; Kadi, Faris ; Winzer, Torben ; Seunghyun Lee ; Che-Hung Liu ; Zhaohui Zhong ; Xiaohan Wang ; Ruoff, Rodney S. ; Berger, Claire ; de Heer, Walt A. ; Malic, Ermin ; Knorr, Andreas ; Norris, Theodore B.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
We combine ultrafast time-resolved THz spectroscopy and microscopic modeling to study the hot-carrier relaxation and cooling dynamics in graphene; we obtain quantitative agreement without the need to invoke disorder effects and demonstrate that the dynamics are the result of the intricate interplay between carrier-carrier and carrier-phonon interactions.
Keywords :
carrier relaxation time; graphene; high-speed optical techniques; nanostructured materials; terahertz spectroscopy; terahertz wave spectra; time resolved spectroscopy; C; carrier-carrier interactions; carrier-phonon interactions; cooling dynamics; disorder effects; graphene; hot-carrier relaxation; microscopic modeling; microscopic origins; terahertz carrier relaxation; ultrafast time-resolved THz spectroscopy; Cooling; Graphene; Microscopy; Optical microscopy; Probes; Substrates; Temperature measurement;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
