High harmonic generation in undoped graphene: Interplay of inter- and intraband dynamics

被引:122
作者
Al-Naib, Ibraheem [1 ]
Sipe, J. E. [2 ,3 ]
Dignam, Marc M. [1 ]
机构
[1] Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON K7L 3N6, Canada
[2] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada
[3] Univ Toronto, Inst Opt Sci, Toronto, ON M5S 1A7, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
TERAHERTZ; SPECTROSCOPY; NOISE;
D O I
10.1103/PhysRevB.90.245423
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We develop a density-matrix formalism in the length gauge to calculate the nonlinear response of intrinsic monolayer graphene at terahertz frequencies. Employing a tight-binding model, we find that the interplay of the interband and intraband dynamics leads to strong harmonic generation at moderate field amplitudes. In particular, we find that at low temperature, the reflected field of undoped suspended graphene exhibits a third harmonic amplitude that is 32% of the fundamental for an incident field of 100 V/cm. Moreover, we find that up to the seventh harmonic and beyond are generated.
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收藏
页数:7
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