Terahertz Graphene Optics

Nima Rouhi; Santiago Capdevila; Dheeraj Jain; Katayoun Zand; Yung Yu Wang; Elliott Brown; Lluis Jofre; Peter Burke

doi:10.1007/s12274-012-0251-0

Terahertz Graphene Optics

Nima Rouhi, Santiago Capdevila, Dheeraj Jain, Katayoun Zand, Yung Yu Wang, Elliott Brown, Lluis Jofre, Peter Burke

Research output: Contribution to journal › Article › peer-review

Abstract

The magnitude of the optical sheet conductance of single-layer graphene is universal, and equal to e2/4h{stroke} (where 2πh{stroke} = h (the Planck constant)). As the optical frequency decreases, the conductivity decreases. However, at some frequency in the THz range, the conductivity increases again, eventually reaching the DC value, where the magnitude of the DC sheet conductance generally displays a sample- and doping-dependent value between ~e2/h and 100 e2/h. Thus, the THz range is predicted to be a non-trivial region of the spectrum for electron transport in graphene, and may have interesting technological applications. In this paper, we present the first frequency domain measurements of the absolute value of multilayer graphene (MLG) and single-layer graphene (SLG) sheet conductivity and transparency from DC to 1 THz, and establish a firm foundation for future THz applications of graphene.

Original language	English
Pages (from-to)	667-678
Number of pages	12
Journal	Nano Research
Volume	5
Issue number	10
DOIs	https://doi.org/10.1007/s12274-012-0251-0
State	Published - Oct 2012

ASJC Scopus Subject Areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

Keywords

broadband
conductance
multilayer graphene
Single-layer graphene
terahertz

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10.1007/s12274-012-0251-0

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title = "Terahertz Graphene Optics",

abstract = "The magnitude of the optical sheet conductance of single-layer graphene is universal, and equal to e2/4h\{stroke\} (where 2πh\{stroke\} = h (the Planck constant)). As the optical frequency decreases, the conductivity decreases. However, at some frequency in the THz range, the conductivity increases again, eventually reaching the DC value, where the magnitude of the DC sheet conductance generally displays a sample- and doping-dependent value between \textasciitilde{}e2/h and 100 e2/h. Thus, the THz range is predicted to be a non-trivial region of the spectrum for electron transport in graphene, and may have interesting technological applications. In this paper, we present the first frequency domain measurements of the absolute value of multilayer graphene (MLG) and single-layer graphene (SLG) sheet conductivity and transparency from DC to 1 THz, and establish a firm foundation for future THz applications of graphene.",

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AU - Rouhi, Nima

AU - Capdevila, Santiago

AU - Jain, Dheeraj

AU - Zand, Katayoun

AU - Wang, Yung Yu

AU - Brown, Elliott

AU - Jofre, Lluis

AU - Burke, Peter

PY - 2012/10

Y1 - 2012/10

N2 - The magnitude of the optical sheet conductance of single-layer graphene is universal, and equal to e2/4h{stroke} (where 2πh{stroke} = h (the Planck constant)). As the optical frequency decreases, the conductivity decreases. However, at some frequency in the THz range, the conductivity increases again, eventually reaching the DC value, where the magnitude of the DC sheet conductance generally displays a sample- and doping-dependent value between ~e2/h and 100 e2/h. Thus, the THz range is predicted to be a non-trivial region of the spectrum for electron transport in graphene, and may have interesting technological applications. In this paper, we present the first frequency domain measurements of the absolute value of multilayer graphene (MLG) and single-layer graphene (SLG) sheet conductivity and transparency from DC to 1 THz, and establish a firm foundation for future THz applications of graphene.

AB - The magnitude of the optical sheet conductance of single-layer graphene is universal, and equal to e2/4h{stroke} (where 2πh{stroke} = h (the Planck constant)). As the optical frequency decreases, the conductivity decreases. However, at some frequency in the THz range, the conductivity increases again, eventually reaching the DC value, where the magnitude of the DC sheet conductance generally displays a sample- and doping-dependent value between ~e2/h and 100 e2/h. Thus, the THz range is predicted to be a non-trivial region of the spectrum for electron transport in graphene, and may have interesting technological applications. In this paper, we present the first frequency domain measurements of the absolute value of multilayer graphene (MLG) and single-layer graphene (SLG) sheet conductivity and transparency from DC to 1 THz, and establish a firm foundation for future THz applications of graphene.

KW - broadband

KW - conductance

KW - multilayer graphene

KW - Single-layer graphene

KW - terahertz

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JO - Nano Research

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ER -

Terahertz Graphene Optics

Abstract

ASJC Scopus Subject Areas

Keywords

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