Reciprocal-Space-Trajectory Perspective on High-Harmonic Generation in Solids

Li, Liang; Lan, Pengfei; Zhu, Xinxin; Huang, Tengfei; Zhang, Qingbin; Lein, Manfred; Lu, Peixiang

doi:10.1103/physrevlett.122.193901

Cited by 122 publications

(75 citation statements)

References 42 publications

(56 reference statements)

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“…Thus our findings confirm the very recently proposed four-step model of HHG in solids, i.e., before interband excitation (also be called "ionization") to the conduction band, the electron is accelerated for a while until it reaches to the top of the valence band [40]. It has been demonstrated that the cutoff of HHG is strongly extended in a circularly polarized field due to this preacceleration process [40]. Here we demonstrate that this preacceleration process has also consequences for linearly polarized two-color fields and results in a strong enhancement of the HHG and the population in the conduction band.…”

Section: Resultssupporting

confidence: 91%

Enhanced high-order harmonic generation in semiconductors by excitation with multicolor pulses

et al. 2020

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We investigate high-order harmonic generation in ZnO driven by linearly polarized multi-color pulses. It is shown that the intensities of the harmonics in the plateau region can be enhanced by two to three orders of magnitude when driven by two-or three-color fields as compared with the single-color pulse excitation. By analyzing the time-dependent population in the conduction band as function of both the initial and the moving crystal momenta, we demonstrate that this remarkable enhancement originates from the intraband preacceleration of electrons from their initial momenta to the top of the valence band where interband excitation takes place. We show that this preacceleration strongly increases the population in the conduction band and correspondingly the intensities of high harmonics in the plateau region. Our results confirm the very recently proposed four-step model for high harmonic generation in semiconductors [Phys. Rev. Lett. 122, 193901 (2019)] and provide an effective way to enhance the intensities of harmonics in the plateau region which has significant implications for the generation of bright attosecond light sources from semiconductors.

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Section: Resultssupporting

confidence: 91%

Enhanced high-order harmonic generation in semiconductors by excitation with multicolor pulses

et al. 2020

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“…Graphene is also convenient to integrate with other optical nanodevices thanks to its dimensionless and flexible properties [6]. Moreover, graphene is utilized to investigate nonlinear optics due to its high nonlinear coefficient [19][20][21][22][23]. Many schemes are proposed to manipulate the optical property and control the propagation of SPPs, such as coupled graphene waveguides [24][25][26], graphene metamaterials [7,27], and dynamic modulation [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays

Zhang

Zhao

et al. 2019

Applied Sciences

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We investigate the topological bound modes of surface plasmon polaritons (SPPs) in a graphene pair waveguide array. The arrays are with uniform inter-layer and intra-layer spacings but the chemical potential of two graphene in each pair are different. The topological bound modes emerge when two arrays with opposite sequences of chemical potential are interfaced, which are analogous to Jackiw-Rebbi modes with opposite mass. We show the topological bound modes can be dynamically controlled by tuning the chemical potential, and the propagation loss of topological bound modes can be remarkably reduced by decreasing the chemical potential. Thanks to the strong confinement of graphene SPPs, the modal wavelength of topological bound modes can be squeezed as small as 1/70 of incident wavelength. The study provides a promising approach to realizing robust light transport beyond diffraction limit.

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“…(2) Strong coupling can also lead to new series of energy conversion processes, such as the photon-thermal-electricity [107] and photon-electricity-thermal [108] processes induced by surface plasmon elements. This has opened up a new route for further exploration of the physical mechanism [109] of surface plasmon and exciton coupling and for the development of new optoelectronic devices, which will have great scientific significance.…”

Section: Conclusion and Development Trendsmentioning

confidence: 99%

Principle and Applications of the Coupling of Surface Plasmons and Excitons

Liu

et al. 2020

Applied Sciences

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Surface plasmons have been attracting increasing attention and have been studied extensively in recent decades because of their half-light and half-material polarized properties. On the one hand, the tightly confined surface plasmonic mode may reduce the size of integrated optical devices beyond the diffraction limit; on the other hand, it provides an approach toward enhancement of the interactions between light and matter. In recent experiments, researchers have realized promising applications for surface plasmons in quantum information processing, ultra-low-power lasers, and micro-nano processing devices by using plasmonic structures, which have demonstrated their superiority over traditional optics structures. In this paper, we introduce the theoretical principle of surface plasmons and review the research work related to the interactions between plasmons and excitons. Some perspectives with regard to the future development of plasmonic coupling are also outlined.

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Reciprocal-Space-Trajectory Perspective on High-Harmonic Generation in Solids

Cited by 122 publications

References 42 publications

Enhanced high-order harmonic generation in semiconductors by excitation with multicolor pulses

Enhanced high-order harmonic generation in semiconductors by excitation with multicolor pulses

Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays

Principle and Applications of the Coupling of Surface Plasmons and Excitons

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