Generation of terahertz radiation by optical excitation of aligned carbon nanotubes.

Titova, Lyubov V; Pint, Cary L; Zhang, Qi; Hauge, Robert H; Kono, Junichiro; Hegmann, Frank A

Titova, Lyubov V; Pint, Cary L; Zhang, Qi; Hauge, Robert H; Kono, Junichiro; Hegmann, Frank A.

Afiliación

Titova LV; Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada.
Pint CL; Department of Physics, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States.
Zhang Q; §Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37240, United States.

Nano Lett ; 15(5): 3267-72, 2015 May 13.

Article en En | MEDLINE | ID: mdl-25879274

RESUMEN

We have generated coherent pulses of terahertz radiation from macroscopic arrays of aligned single-wall carbon nanotubes (SWCNTs) excited by femtosecond optical pulses without externally applied bias. The generated terahertz radiation is polarized along the SWCNT alignment direction. We propose that top-bottom asymmetry in the SWCNT arrays produces a built-in electric field in semiconducting SWCNTs, which enables generation of polarized terahertz radiation by a transient photocurrent surge directed along the nanotube axis.

Palabras clave

SWCNTs; Single-wall carbon nanotubes; THz pulses; terahertz generation

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2015 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Estados Unidos

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google