Terahertz conductivity characterization of nanostructured graphene-like films for optoelectronic applications

Ehsan Dadrasnia; Horacio Lamela

doi:10.1117/1.JNP.9.093598

19 January 2015 Terahertz conductivity characterization of nanostructured graphene-like films for optoelectronic applications

Ehsan Dadrasnia, Horacio Lamela

Author Affiliations +

Journal of Nanophotonics, Vol. 9, Issue 1, 093598 (January 2015). https://doi.org/10.1117/1.JNP.9.093598

Abstract

Difficulty in deposition and integration of fragile graphene-like samples for optoelectronic devices may prevent a multiple contact measurement procedure. We employed noncontact and nondestructive transmission and reflection terahertz (THz)-pulsed spectroscopy to investigate not only the electrical conductivity, but also to study the optical properties of one-dimensional and two-dimensional graphene-like samples. The Drude and non-Drude models were applied to observe and compare the ultrafast carrier transport parameters and high mobility characteristic of such high conductance-nanostructured thin films without requirement for postprocess patterning. The diffusive coefficient and nanoscopic characteristic length from noncontact THz measurement enables us to predict the cut-off frequency of such devices in relevant optoelectronic applications in sub-THz and THz frequencies. The results show that the cut-off frequency of the devices increases with a reduction of the channel length.

Citation Download Citation

Ehsan Dadrasnia and Horacio Lamela "Terahertz conductivity characterization of nanostructured graphene-like films for optoelectronic applications," Journal of Nanophotonics 9(1), 093598 (19 January 2015). https://doi.org/10.1117/1.JNP.9.093598

Published: 19 January 2015

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available