Controlling ultrafast currents by the nonlinear photogalvanic effect

Wachter, Georg; Sato, Shunsuke A.; Floss, Isabella; Lemell, C.; Tong, Xiao-Min; Yabana, Kazuhiro; Burgdörfer, Joachim

doi:10.1088/1367-2630/17/12/123026

Cited by 26 publications

(19 citation statements)

References 62 publications

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“…This application exemplifies time-resolved measurements with a subfemtosecond sampling signal, which is referred to as attosecond metrology (Hentschel et al, 2001;Krausz and Stockman, 2014). Employing the waveform control to investigate and possibly extend the frontiers of signal processing in electronics is another intriguing idea Lee et al, 2016;Wachter et al, 2015). Even from a purely academic perspective, studying the nonequilibrium electron dynamics on the femtosecond scale present numerous research opportunities, one of which is the transition from ballistic to dissipative electron transport in a pump-probe setting (Wachter et al, 2014).…”

Section: B Light-waveform Control Of Electric Currentmentioning

confidence: 99%

Colloquium : Strong-field phenomena in periodic systems

Kruchinin¹,

Krausz²,

Yakovlev³

2018

Rev. Mod. Phys.

259

151

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The advent of visible-infrared laser pulses carrying a substantial fraction of their energy in a single field oscillation cycle has opened a new era in the experimental investigation of ultrafast processes in semiconductors and dielectrics (bulk as well as nanostructured), motivated by the quest for the ultimate frontiers of electron-based signal metrology and processing. Exploring ways to approach those frontiers requires insight into the physics underlying the interaction of strong high-frequency (optical) fields with electrons moving in periodic potentials. This Colloquium aims at providing this insight. Introduction to the foundations of strong-field phenomena defines and compares regimes of field-matter interaction in periodic systems, including (perfect) crystals as well as optical and semiconductor superlattices, followed by a review of recent experimental advances in the study of strong-field dynamics in crystals and nanostructures. Avenues toward measuring and controlling electronic processes up to petahertz frequencies are discussed.

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Section: B Light-waveform Control Of Electric Currentmentioning

confidence: 99%

Colloquium : Strong-field phenomena in periodic systems

Kruchinin¹,

Krausz²,

Yakovlev³

2018

Rev. Mod. Phys.

259

151

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“…We use TDDFT in a real-space real-time implementation [36,37] to simulate the electronic dynamics driven by the strong IR field F (t) employing the adiabatic localdensity approximation (LDA). Alternatively, we implement the SBEs by propagating the elements of the density matrix ρ k mn ,…”

mentioning

confidence: 99%

Ab initio multiscale simulation of high-order harmonic generation in solids

et al. 2018

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High-harmonic generation by a highly non-linear interaction of infrared laser fields with matter allows for the generation of attosecond pulses in the XUV spectral regime. This process, well established for atoms, has been recently extended to the condensed phase. Remarkably well pronounced harmonics up to order ∼ 30 have been observed for dielectrics. We present the first ab-initio multiscale simulation of solid-state high-harmonic generation. We find that mesoscopic effects of the extended system, in particular the realistic sampling of the entire Brillouin zone, the pulse propagation in the dense medium, and the inhomogeneous illumination of the crystal have a strong effect on the formation of clean harmonic spectra. Our results provide a novel explanation for the formation of clean harmonics and have implications for a wide range of non-linear optical processes in dense media.PACS numbers: 42.65. Ky, 42.50.Hz, 72.20.Ht The generation of high harmonics (HHG) in the nonlinear interaction of intense ultrashort infrared (IR) laser pulses with matter has turned out to be a highly successful route towards the generation of attosecond pulses in the EUV and XUV spectral regimes [1][2][3][4]. It has become the workhorse of investigation of a vast array of electronic processes on the attosecond time scale [5]. Expanding the range of accessible photon energies and intensities faces, however, fundamental limitations. Experimental and theoretical investigations have established a scaling of the cut-off energy E cut ∝ λ 2 for HHG from atoms in the gas phase raising hopes to reach ever higher photon energies by increasing the wavelength λ of the driving laser pulse. However, the intensity in the cut-off region was found to scale unfavorably I cut ∝ λ −5.3 due to the large spatial dispersion of the electron wave packet upon return to its parent atom [6][7][8][9][10]. Propagation effects in gas filled capillaries have been found to partially offset this suppression at high λ [11].Extending HHG to the condensed phase promises to overcome some of these limitations to enable compact and brighter light sources and to open up the novel field of solid-state photonics on the attosecond scale. The recent observation of HHG in solids for intensities below the damage threshold [12][13][14][15][16][17][18] suggests opportunities for controlling electronic dynamics [16,17] and for an alloptical reconstruction of the band structure [19].The observed solid-state HHG substantially differs from the corresponding atomic spectra. For example, while for atoms the cut-off frequency ω HHG cut scales linearly with the (peak) intensity I 0 of the driving pulse [20,21] One major puzzle has remained so far unresolved: while many experiments display remarkably "clean" harmonic spectra with pronounced peaks near multiples of the driving frequency (odd multiples when inversion symmetry is preserved) all the way up to the cutoff frequency, corresponding simulations display a noisy spectrum lacking any clear harmonic structure over a wide range of fre...

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“…is the vector potential of the driving laser, and C is an adjustable parameter. As already demonstrated [26], the charge can be obtained by and his co-workers also found a sudden reversal of the directional currents above critical threshold intensity in their simulation based on time-dependent density functional theory [27]. In 6 their case, CEP effect was removed by applying a longer laser pulse.…”

Section: Results and Disscussionmentioning

confidence: 65%

Quantum-trajectory analysis for charge transfer in solid materials induced by strong laser fields

Jiang

Yuan

et al. 2017

J. Phys.: Condens. Matter

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We investigate the dependence of charge transfer on the intensity of driving laser field when SiO crystal is irradiated by an 800 nm laser. It is surprising that the direction of charge transfer undergoes a sudden reversal when the driving laser intensity exceeds critical values with different carrier-envelope phases. By applying quantum-trajectory analysis, we find that the Bloch oscillation plays an important role in charge transfer in solids. Also, we study the interaction of a strong laser with gallium nitride (GaN), which is widely used in optoelectronics. A pump-probe scheme is applied to control the quantum trajectories of the electrons in the conduction band. The signal of charge transfer is controlled successfully by means of a theoretically proposed approach.

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Controlling ultrafast currents by the nonlinear photogalvanic effect

Cited by 26 publications

References 62 publications

Colloquium : Strong-field phenomena in periodic systems

Colloquium : Strong-field phenomena in periodic systems

Ab initio multiscale simulation of high-order harmonic generation in solids

Quantum-trajectory analysis for charge transfer in solid materials induced by strong laser fields

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