Dynamical polarizability of graphene irradiated by circularly polarized ac electric fields

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Dynamical polarizability of graphene irradiated by circularly polarized ac electric fields. / Busl, Maria; Platero, Gloria; Jauho, Antti-Pekka.

In: Physical Review B (Condensed Matter and Materials Physics), Vol. 85, No. 15, 2012.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Author

Busl, Maria; Platero, Gloria; Jauho, Antti-Pekka / Dynamical polarizability of graphene irradiated by circularly polarized ac electric fields.

In: Physical Review B (Condensed Matter and Materials Physics), Vol. 85, No. 15, 2012.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{7f9b6b4c52364adb874b19c524744772,
title = "Dynamical polarizability of graphene irradiated by circularly polarized ac electric fields",
publisher = "American Physical Society",
author = "Maria Busl and Gloria Platero and Antti-Pekka Jauho",
year = "2012",
doi = "10.1103/PhysRevB.85.155449",
volume = "85",
number = "15",
journal = "Physical Review B (Condensed Matter and Materials Physics)",
issn = "1098-0121",

}

RIS

TY - JOUR

T1 - Dynamical polarizability of graphene irradiated by circularly polarized ac electric fields

A1 - Busl,Maria

A1 - Platero,Gloria

A1 - Jauho,Antti-Pekka

AU - Busl,Maria

AU - Platero,Gloria

AU - Jauho,Antti-Pekka

PB - American Physical Society

PY - 2012

Y1 - 2012

N2 - We examine the low-energy physics of graphene in the presence of a circularly polarized electric field in the terahertz regime. Specifically, we derive a general expression for the dynamical polarizability of graphene irradiated by an ac electric field. Several approximations are developed that allow one to develop a semianalytical theory for the weak-field regime. The ac field changes qualitatively the single- and many-electron excitations of graphene: Undoped samples may exhibit collective excitations (in contrast to the equilibrium situation), and the properties of the excitations in doped graphene are strongly influenced by the ac field. We also show that the intensity of the external field is the critical control parameter for the stability of these excitations.

AB - We examine the low-energy physics of graphene in the presence of a circularly polarized electric field in the terahertz regime. Specifically, we derive a general expression for the dynamical polarizability of graphene irradiated by an ac electric field. Several approximations are developed that allow one to develop a semianalytical theory for the weak-field regime. The ac field changes qualitatively the single- and many-electron excitations of graphene: Undoped samples may exhibit collective excitations (in contrast to the equilibrium situation), and the properties of the excitations in doped graphene are strongly influenced by the ac field. We also show that the intensity of the external field is the critical control parameter for the stability of these excitations.

U2 - 10.1103/PhysRevB.85.155449

DO - 10.1103/PhysRevB.85.155449

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

SN - 1098-0121

IS - 15

VL - 85

ER -