Circular dichroism in higher-order harmonic generation: Heralding topological phases and transitions in Chern insulators

Chacón, Alexis; Kim, Dasol; Zhu, Wei; Kelly, Shane P.; Dauphin, Alexandre; Pisanty, Emilio; Maxwell, Andrew S.; Picón, Antonio; Ciappina, M. F.; Kim, Dong Eon; Ticknor, Christopher; Saxena, Avadh

doi:10.1103/physrevb.102.134115

Cited by 121 publications

(86 citation statements)

References 109 publications

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“…It can even be a little bit of both, as in the first description of the RABBITT scheme in 1990 [175], or in single-photon laser-enabled Auger decay (sp-LEAD), which was predicted in 2013 [176], first observed in 2017 [177], and further characterised in [178]. There are also theoretical predictions-both analytical, like molecular Auger interferometry [179], and numerical, like HHG in topological solids [180][181][182]-which have already sparked experimental efforts to confirm them, but which are still waiting for their observations to come. On the other side, we have discoveries which arise from experimental observations and are then explained theoretically, such as NSDI, which was discussed in detail in Sect.…”

Section: Scientific Discoverymentioning

confidence: 99%

Dialogue on analytical and ab initio methods in attoscience

et al. 2021

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The perceived dichotomy between analytical and ab initio approaches to theory in attosecond science is often seen as a source of tension and misconceptions. This Topical Review compiles the discussions held during a round-table panel at the ‘Quantum Battles in Attoscience’ cecam virtual workshop, to explore the sources of tension and attempt to dispel them. We survey the main theoretical tools of attoscience—covering both analytical and numerical methods—and we examine common misconceptions, including the relationship between ab initio approaches and the broader numerical methods, as well as the role of numerical methods in ‘analytical’ techniques. We also evaluate the relative advantages and disadvantages of analytical as well as numerical and ab initio methods, together with their role in scientific discovery, told through the case studies of two representative attosecond processes: non-sequential double ionisation and resonant high-harmonic generation. We present the discussion in the form of a dialogue between two hypothetical theoreticians, a numericist and an analytician, who introduce and challenge the broader opinions expressed in the attoscience community.

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Section: Scientific Discoverymentioning

confidence: 99%

Dialogue on analytical and ab initio methods in attoscience

et al. 2021

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“…For instance, the hole can be driven by the laser as well, since the energy dispersion of valence states is not zero [154,155]. This causes novel ultrafast dynamics, which differ from those in the gas phase, and are present not only in ordinary semiconductors, but also in quantum materials [157,158,165,166].…”

Section: Toward Nonlinear Ultrafast Spectroscopy Of Quantum Materialsmentioning

confidence: 99%

Quantum interference and imaging using intense laser fields

et al. 2021

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The interference of matter waves is one of the intriguing features of quantum mechanics that has impressed researchers and laymen since it was first suggested almost a century ago. Nowadays, attosecond science tools allow us to utilize it in order to extract valuable information from electron wave packets. Intense laser fields are routinely employed to create electron wave packets and control their motion with attosecond and ångström precision. In this perspective article, which is based on our debate at the Quantum Battles in Attoscience virtual workshop 2020, we discuss some of the peculiarities of intense light-matter interaction. We review some of the most important techniques used in attosecond imaging, namely photoelectron holography and laser-induced electron diffraction. We attempt to ask and answer a few questions that do not get asked very often. For example, if we are interested in position space information, why are measurements carried out in momentum space? How to accurately retrieve photoelectron spectra from the numerical solution of the time-dependent Schrödinger equation? And, what causes the different coherence properties of high-harmonic generation and above-threshold ionization? GraphicAbstract

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“…Hexagonal boron nitride (h-BN) is a different example with the same lattice structure. HHG in hexagonal lattice structures has been studied for the bulk and for ribbons for topologically trivial graphene and h-BN [21][22][23][24][25] and the topologically nontrivial Haldane model [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

High-order harmonic generation in hexagonal nanoribbons

Jürß

Bauer

2021

Eur. Phys. J. Spec. Top.

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The generation of high-order harmonics in finite, hexagonal nanoribbons is simulated. Ribbons with armchair and zig-zag edges are investigated by using a tight-binding approach with only nearest-neighbor hopping. By turning an alternating on-site potential off or on, the system describes for example graphene or hexagonal boron nitride, respectively. The incoming laser pulse is linearly polarized along with the ribbons. The emitted light has a polarization component parallel to the polarization of the incoming field. The presence or absence of a polarization component perpendicular to the polarization of the incoming field can be explained by the symmetry of the ribbons. Characteristic features in the harmonic spectra for the finite ribbons are analyzed with the help of the band structure for the corresponding periodic systems.

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Circular dichroism in higher-order harmonic generation: Heralding topological phases and transitions in Chern insulators

Cited by 121 publications

References 109 publications

Dialogue on analytical and ab initio methods in attoscience

Dialogue on analytical and ab initio methods in attoscience

Quantum interference and imaging using intense laser fields

High-order harmonic generation in hexagonal nanoribbons

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