Effect of elliptical polarization of driving field on high-order-harmonic generation in semiconductor ZnO

Liu, Candong; Zheng, Yinghui; Zhang, Zhinan; Li, Ruxin

doi:10.1103/physreva.93.043806

Cited by 41 publications

(28 citation statements)

References 34 publications

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“…However, like in atoms and molecules, circularly polarized light suppresses HHG from this material 32 . Solving the semiconductor Bloch equations for a two-band model for ZnO showed that the harmonic yield monotonically decreases with a Gaussian profile with increasing ellipticity 33 . Such an atomic-like monotonic decrease of the harmonic yield with increasing driving field ellipticity was recently observed experimentally also from rare-earth solids 34 and monolayer MoS 2 35 .…”

Section: Introductionmentioning

confidence: 99%

Ellipticity dependence of high-harmonic generation in solids originating from coupled intraband and interband dynamics

et al. 2017

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The strong ellipticity dependence of high-harmonic generation (HHG) in gases enables numerous experimental techniques that are nowadays routinely used, for instance, to create isolated attosecond pulses. Extending such techniques to solids requires a fundamental understanding of the microscopic mechanism of HHG. Here we use first-principles simulations within a time-dependent density-functional framework and show how intraband and interband mechanisms are strongly and differently affected by the ellipticity of the driving laser field. The complex interplay between intraband and interband effects can be used to tune and improve harmonic emission in solids. In particular, we show that the high-harmonic plateau can be extended by as much as 30% using a finite ellipticity of the driving field. We furthermore demonstrate the possibility to generate, from single circularly polarized drivers, circularly polarized harmonics. Our work shows that ellipticity provides an additional knob to experimentally optimize HHG in solids.

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Section: Introductionmentioning

confidence: 99%

Ellipticity dependence of high-harmonic generation in solids originating from coupled intraband and interband dynamics

et al. 2017

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“…Similar to the two-band SBE model as described above, a threedimensional (3D) single active electron model called two-band density matrix equations (DME) [17,29,50,[73][74][75][76] is suggested and numerically solved to study the HHG in bulk crystals when exposed to intense lasers: _ πðK; tÞ ¼ À πðK; tÞ T 2 À iΩðK; tÞwðK; tÞe ÀiSðK;tÞ ;…”

Section: Two-band Modelmentioning

confidence: 99%

“…Then, interband Bloch oscillations were identified as the mechanism for the higher plateaus in solid HHG from DME model [74]. Liu et al [75] theoretically investigated HHG in ZnO by DME model with elliptically polarized MIR light, and they demonstrated that the sensitivity for the ellipticity dependence of the interband harmonics above the band gap is determined by both the harmonic order and the intensity of driving light. They also pointed out HHG from elliptically polarized driving field carries the significant signature of the band structure in solids [75].…”

mentioning

confidence: 99%

“…Liu et al [75] theoretically investigated HHG in ZnO by DME model with elliptically polarized MIR light, and they demonstrated that the sensitivity for the ellipticity dependence of the interband harmonics above the band gap is determined by both the harmonic order and the intensity of driving light. They also pointed out HHG from elliptically polarized driving field carries the significant signature of the band structure in solids [75]. Interestingly, the effect of quantum confinement on HHG in semiconductors was investigated by systematically varying the width of a model quantum nanowire in DME model [29], indicating that low-dimension systems present a potential pathway to increase yield and photon energy of HHG in solids.…”

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confidence: 99%

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High order harmonic generation in solids: a review on recent numerical methods

Jiang

2019

Advances in Physics: X

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Interaction of intense lasers with solid materials offers an alternative way to achieve high-order harmonic generation (HHG). Since the underlying mechanisms of the harmonic emission remain uncertain, a large number of theoretical studies have been proposed to explain the experimental findings in this fast-growing field. Here, we review the primary numerical methods and present a brief perspective of HHG in solids.

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“…The mechanism is well described by the three-step recollision model [3]. Recently, more attention has been attracted to the HHG from solids [4][5][6][7][8][9][10][11][12] with the development of long-wavelength lasers. Solid HHG demonstrates novel characters different from the HHG from gases.…”

Section: Introductionmentioning

confidence: 99%

High-order harmonic generation from 2D periodic potentials in circularly and bichromatic circularly polarized laser fields

Jia

Wang

et al. 2018

The Journal of Chemical Physics

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We studied the high-order harmonic generation (HHG) from 2D solid materials in circularly and bichromatic circularly polarized laser fields numerically by simulating the dynamics of single-activeelectron processes in 2D periodic potentials. Contrary to the absence of HHG in the atomic case, circular HHGs below the bandgap with different helicities are produced from intraband transitions in solids with C 4 symmetry driven by circularly polarized lasers. Harmonics above the bandgap are elliptically polarized due to the interband transitions. High-order elliptically polarized harmonics can be generated efficiently by both co-rotating and counter-rotating bicircular mid-infrared lasers.The cutoff energy, ellipticity, phase, and intensity of the harmonics can be tuned by the control of the relative phase difference between the 1ω and 2ω fields in bicircularly polarized lasers, which can be utilized to image the structure of solids.

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Effect of elliptical polarization of driving field on high-order-harmonic generation in semiconductor ZnO

Cited by 41 publications

References 34 publications

Ellipticity dependence of high-harmonic generation in solids originating from coupled intraband and interband dynamics

Ellipticity dependence of high-harmonic generation in solids originating from coupled intraband and interband dynamics

High order harmonic generation in solids: a review on recent numerical methods

High-order harmonic generation from 2D periodic potentials in circularly and bichromatic circularly polarized laser fields

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