Title :
Very slow carrier cooling in graphene measured by optical/THz pump-probe spectroscopy
Author :
Strait, Jared ; Wang, Haining ; Shivaraman, Shriram ; Shields, Virgil ; Spencer, Michael ; Rana, Farhan
Author_Institution :
Dept. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA
Abstract :
We present results on the relaxation dynamics of photoexcited carriers in graphene using optical-pump terahertz-probe spectroscopy. Our measurements indicate that carrier cooling is extremely slow at low temperatures where electron-optical phonon cooling becomes inefficient.
Keywords :
carrier relaxation time; electron-phonon interactions; graphene; high-speed optical techniques; terahertz wave spectra; C; electron-optical phonon cooling; graphene; optical-THz pump-probe spectroscopy; photoexcited carriers; relaxation dynamics; slow carrier cooling; Optical pulses; Optical pumping; Optical scattering; Optical variables measurement; Phonons; Stimulated emission; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2011 Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1223-4
