Nonlinear response of graphene to a few-cycle terahertz laser pulse: Role of doping and disorder

Чижова, Лариса А.; Libisch, Florian; Burgdörfer, Joachim

doi:10.1103/physrevb.94.075412

Cited by 41 publications

(27 citation statements)

References 49 publications

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“…Current research of HHG in 2D materials has been primarily focused on graphene, [64][65][66][67][72][73][74][75][76][77][78][79][80][81][82][83] the most known prototype atomically thin material. Besides, studies of HHG in silicene, 84 hBN, 68,70 and MoS 2 63,85 have also been reported.…”

Section: Superior Hhg Propertiesmentioning

confidence: 99%

Strong-field nonlinear optical properties of monolayer black phosphorus

Chen

Qin

2019

Nanoscale

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Within the past few years, atomically thin black phosphorus (BP) has been demonstrated as a fascinating new 2D material that is promising for novel nanoelectronics and nanophotonics applications, due to its many unique properties such as direct and widely tunable bandgap, high carrier mobility and remarkable intrinsic in-plane anisotropy.However, its important extreme nonlinear behavior and ultrafast dynamics of carriers under strong-field excitation have yet to be revealed to date. Herein, we report nonperturbative high harmonic generation (HHG) in monolayer BP by first-principles simulations. We show that BP exhibits extraordinary HHG properties, with clear advantages over three major types of 2D materials under intensive study, i.e., semimetallic graphene, semiconducting MoS 2 , and insulating hexagonal boron nitride, in terms of HHG cutoff energy and spectral intensity. This study advances the scope of current research activities of BP into a new regime, suggesting its promising future in applications of extreme-ultraviolet and attosecond nanophotonics, and also opening doors to investigate the strong-field and ultrafast carrier dynamics of this emerging material.1

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Section: Superior Hhg Propertiesmentioning

confidence: 99%

Strong-field nonlinear optical properties of monolayer black phosphorus

Chen

Qin

2019

Nanoscale

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“…E?1 V nm −1 ) the change in the electron wavenumber during the light-matter interaction can no longer be neglected. Due to the change of the electrons' wavenumber the electrons may pass nearby an avoided crossing formed around band gaps in solids [1,2,7,[26][27][28]. When the electron approaches nearby the avoided crossing the dipole moment between the two coupled bands is maximal, resulting in an enhanced transition probability from one band to the other.…”

Section: Introductionmentioning

confidence: 99%

Interaction of carrier envelope phase-stable laser pulses with graphene: the transition from the weak-field to the strong-field regime

et al. 2019

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Ultrafast control of electron dynamics in solid state systems has recently found particular attention. By increasing the electric field strength of laser pulses, the light-matter interaction in solids might turn from a perturbative into a novel non-perturbative regime, where interband transitions from the valence to the conduction band become strongly affected by intraband motion. We have demonstrated experimentally and numerically that this combined dynamics can be controlled in graphene with the electric field waveform of phase-stabilized few-cycle laser pulses (Higuchi et al 2017 Nature 550 224-8; Heide et al 2018 Phys. Rev. Lett. 121 207401). Here we show new experimental data and matching simulation results at comparably low optical fields, which allows us to focus on the highly interesting transition regime where the light-matter interaction turns from perturbative to non-perturbative. We find a 5th order power-law scaling of the laser induced waveform-dependent current at low optical fields, which breaks down for higher optical fields, indicating the transition.

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“…Apart from bulk crystals, nonperturbative HHG in two-dimensional (2D) materials has also attracted much attention [20,21], as they exhibit distinct electronic properties compared to the bulk. In particular, HHG in graphene, the most popular and promising 2D material with zero band gap and massless Dirac fermions, has been actively studied both theoretically [22][23][24][25][26][27][28][29][30][31][32][33] and experimentally [34][35][36][37]. With linear energy dispersion, graphene is expected to display strong nonlinear optical responses.…”

Section: Introductionmentioning

confidence: 99%

Circularly polarized extreme ultraviolet high harmonic generation in graphene

Chen¹,

Qin²

2019

Opt. Express

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Circularly polarized extreme ultraviolet (XUV) radiation is highly interesting for investigation of chirality-sensitive light-matter interactions. Recent breakthroughs have enabled generation of such light sources via high harmonic generation (HHG) from rare gases. There is a growing interest in extending HHG medium from gases to solids, especially to 2D materials, as they hold great promise to develop ultra-compact solid-state photonic devices and provide insights into electronic properties of the materials themselves. However, HHG in graphene driven by terahertz to mid-infrared fields reported so far only generate low harmonic orders, and furthermore no harmonics driven by circularly polarized lasers. Here, using first-principles simulations within a time-dependent density-functional theory framework, we show that it is possible to generate HHG extending to the XUV spectral region in monolayer extended graphene excited by near-infrared lasers. Moreover, we demonstrate that a single circularly polarized driver is enough to ensure HHG in graphene with circular polarization. The corresponding spectra reflect the six-fold rotational symmetry of the graphene crystal. Extending HHG in graphene to the XUV spectral regime and realizing circular polarization represent an important step towards the development of novel nanoscale attosecond photonic devices and numerous applications such as spectroscopic investigation and nanoscale imaging of ultrafast chiral and spin dynamics in graphene and other 2D materials.

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Nonlinear response of graphene to a few-cycle terahertz laser pulse: Role of doping and disorder

Cited by 41 publications

References 49 publications

Strong-field nonlinear optical properties of monolayer black phosphorus

Strong-field nonlinear optical properties of monolayer black phosphorus

Interaction of carrier envelope phase-stable laser pulses with graphene: the transition from the weak-field to the strong-field regime

Circularly polarized extreme ultraviolet high harmonic generation in graphene

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