Carrier-envelope phase effects in graphene

被引：15

作者：

Lefebvre, C. ^{[1
,2
]}

Gagnon, D. ^{[1
,2
]}

Fillion-Gourdeau, F. ^{[1
,2
]}

MacLean, S. ^{[1
,2
]}

机构：

[1] INRS EMT, 1650 Lionel Boulet, Varennes, PQ J3X 1S2, Canada

[2] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2018年 / 35卷 / 04期

基金：

加拿大创新基金会;

关键词：

CYCLE; PULSES; FIELDS;

D O I：

10.1364/JOSAB.35.000958

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We numerically study the interaction of a terahertz pulse with monolayer graphene. We observe that the electron momentum density is affected by the carrier-envelope phase (CEP) of the single- to few-cycle terahertz laser pulse that induces the electron dynamics. In particular, we see strong asymmetric electron momentum distributions for non-zero values of the CEP. We explain the origin of the asymmetry within the adiabatic-impulse model by finding conditions to reach minimal adiabatic gap between the valence band and the conduction band. We discuss how these conditions and the interference pattern, emanating from successive non-adiabatic transitions at this minimal gap, affect the electron momentum density and how they are modified by the CEP. This opens the door to control fundamental time-dependent electron dynamics in the tunneling regime in Dirac materials. Also, this control suggests a way to measure the CEP of a terahertz laser pulse when it interacts with condensed matter systems. (c) 2018 Optical Society of America

引用

页码：958 / 966

页数：9

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