Reststrahlen Band assisted photocurrents in graphene

Author

Drexler, C. ; Golub, L.E. ; Danilov, S.N. ; Shalygin, Vadim A. ; Olbrich, P. ; Huber, Rainer ; Yakimova, R. ; Lara-Avila, S. ; Kubatkin, S. ; Redlich, B. ; Ganichev, S.D.

Author_Institution

Terahertz Center, Univ. of Regensburg, Regensburg, Germany

fYear

2013

fDate

1-6 Sept. 2013

Firstpage

1

Lastpage

1

Abstract

We report on the experimental and theoretical study of the Reststrahlen Band assisted photocurrents in epitaxial grown graphene on SiC. We show that excitation of graphene with infrared radiation results in a dc current. We demonstrate that photocurrent in response to linearly polarized radiation exhibit a resonance enhancement in the frequency range of the Reststrahlen Band of the SiC substrate. By contrast the photocurrent excited by circularly polarized radiation is suppressed in the same spectral range. The developed theory is in agreement with the data and reveals a strong influence of the Reststrahl Band on the high frequency transport in graphene.

Keywords

graphene; high-frequency effects; photoconductivity; photoemission; C; Reststrahlen band assisted photocurrents; SiC; SiC substrate; circularly polarized radiation; dc current; epitaxial grown graphene; graphene excitation; high frequency transport; infrared radiation; linearly polarized radiation; resonance enhancement; Graphene; Photoconductivity; Photonics; Reflection; Silicon carbide; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on

Conference_Location

Mainz

Type

conf

DOI

10.1109/IRMMW-THz.2013.6665561

Filename

6665561