Title :
THz response of graphite nanoplatelets
Author :
Liu, H.L. ; Carr, G.L. ; Worsley, K.A. ; Haddon, R.C.
Author_Institution :
Dept. of Phys., Nat. Taiwan Normal Univ., Taipei, Taiwan
Abstract :
The room-temperature THz spectrum of graphite nanoplatelets shows a free carrier absorption at zero frequency with an electronic scattering rate of 175 cm-1 (3.3 times 1013 rad/s) and plasma frequency of 1675 cm-1. The lack of a major change in Drude plasma frequency down to 4.2 K implies any band gaps in graphite nanoplatelets are less than 1 meV.
Keywords :
electrical conductivity; energy gap; graphite; terahertz wave spectra; thin films; C; Drude plasma frequency; THz spectra; band gap; electrical conductivity; electronic scattering rate; free carrier absorption; graphite nanoplatelet; temperature 293 K to 298 K; thin films; zero frequency; Conductivity; Frequency; Optical films; Optical refraction; Optical scattering; Plasma properties; Scanning electron microscopy; Semiconductor films; Silicon; Substrates;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5416-7
Electronic_ISBN :
978-1-4244-5417-4
DOI :
10.1109/ICIMW.2009.5324705
