Nonperturbative harmonic generation in graphene from intense midinfrared pulsed light

被引：52

作者：

Taucer, M. ^{[1
,2
]}

Hammond, T. J. ^{[1
,2
]}

Corkum, P. B. ^{[1
,2
]}

Vampa, G. ^{[1
,2
]}

Couture, C. ^{[3
]}

Thire, N. ^{[3
]}

Schmidt, B. E. ^{[3
]}

Legare, F. ^{[3
]}

Selvi, H. ^{[4
]}

Unsuree, N. ^{[4
]}

Hamilton, B. ^{[4
]}

Echtermeyer, T. J. ^{[4
]}

Denecke, M. A. ^{[4
]}

机构：

[1] Natl Res Council Canada, Joint Attosecond Sci Lab, Ottawa, ON K1N 6N5, Canada

[2] Univ Ottawa, Ottawa, ON K1N 6N5, Canada

[3] INRS EMT, 1650 Blvd Lionel Boulet,CP 1020, Varennes, PQ J3X 1S2, Canada

[4] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

来源：

PHYSICAL REVIEW B | 2017年 / 96卷 / 19期

基金：

加拿大自然科学与工程研究理事会;

关键词：

NONLINEAR REFRACTIVE-INDEX; MULTIPHOTON IONIZATION; SOLIDS;

D O I：

10.1103/PhysRevB.96.195420

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In solids, high harmonic radiation arises from the subcycle dynamics of electrons and holes under the action of an intense laser field. The strong-field regime opens new opportunities to understand and control carrier dynamics on ultrafast time scales, including the coherent dynamics of quasiparticles such as massless Dirac fermions. Here, we irradiate monolayer and few-layer graphene with intense infrared light to produce nonperturbative harmonics of the fundamental up to the seventh order. We find that the polarization dependence shows surprising agreement with gas-phase harmonics. Using a two-band model, we explore the nonlinear current due to electrons near the Dirac points, and we discuss the interplay between intraband and interband contributions to the harmonic spectrum. This interplay opens new opportunities to access ultrafast and strong-field physics of graphene.

引用

页数：6

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