Visualization and quantum control of light-accelerated condensates by terahertz multi-dimensional coherent spectroscopy

Mootz, M.; Luo, Liang; Wang, Jigang; Perakis, L.E.

doi:10.1038/s42005-022-00822-5

Cited by 18 publications

(13 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This process triggers the phase-amplitude dynamics illustrated in Fig. 1a, whose nonlinear interactions determine the THz-MDCS spectral profile 36 .…”

Section: Articlementioning

confidence: 98%

“…1c). Second, the THz pulses drive the Anderson pseudo-spin oscillators 9,36 at different momenta k (the 'Pseudo-spin canting driven parametrically by phase oscillations' section). The pseudo-spin dynamics is dominated by frequencies ~ωH,i;A = (ω H,i , 0) and ~ωH,i;B = (ω H,i , − ω H,i ), that is, field-dependent Higgs and quasi-particle pair excitations, or ~2ω A,B , that is, quasi-particle excitations driven at the laser frequency.…”

Section: Light-induced Drastic Changes In Collective Modesmentioning

confidence: 99%

“…, which is obtained from Maxwell's equations 38 and differs from the applied field E THz (t) (n is the refractive index and c is the speed of light). This effective field drives the nonlinear supercurrent J(t), described self-consistently by solving the gauge-invariant SC Article https://doi.org/10.1038/s41567-022-01827-1 Bloch equations 24,36,38 (the 'Gauge-invariant theory and simulations of THz-MDCS signals' section) for a three-pocket SC model with strong e-h pocket interaction U far exceeding the intraband pairing interaction. We directly simulate the E NL (t, τ) temporal dynamics measured in the experiment (Fig.…”

Section: Light-induced Drastic Changes In Collective Modesmentioning

confidence: 99%

“…Assuming that the multiband SC system is only weakly spatially dependent 36,38 , we express the gauge-invariant density matrix in terms of Anderson pseudo-spin components at each wavevector k:…”

Section: Gauge-invariant Theory and Simulations Of Thz-mdcs Signalsmentioning

confidence: 99%

“…Terahertz-frequency multidimensional coherent nonlinear spectroscopy (THz-MDCS) 12,[31][32][33][34][35][36] represents a correlation tomography and control tool to distinguish between different many-body response functions and collective modes. Unlike for THz-MDCS studies of semiconductors 12,32,33,37 , magnets 34 and molecular crystals 35 , Fig.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Quantum coherence tomography of light-controlled superconductivity

et al. 2022

View full text Add to dashboard Cite

The coupling between superconductors and oscillation cycles of light pulses, i.e., lightwave engineering, is an emerging control concept for superconducting quantum electronics. Although progress has been made towards terahertz-driven superconductivity and supercurrents, the interactions able to drive non-equilibrium pairing are still poorly understood, partially due to the lack of measurements of high-order correlation functions. In particular, the sensing of exotic collective modes that would uniquely characterize light-driven superconducting coherence, in a way analogous to the Meissner effect, is very challenging but much needed. Here we report the discovery of parametrically driven superconductivity by light-induced order-parameter collective oscillations in iron-based superconductors. The time-periodic relative phase dynamics between the coupled electron and hole bands drives the transition to a distinct parametric superconducting state out-of-equalibrium. This light-induced emergent coherence is characterized by a unique phase–amplitude collective mode with Floquet-like sidebands at twice the Higgs frequency. We measure non-perturbative, high-order correlations of this parametrically driven superconductivity by separating the terahertz-frequency multidimensional coherent spectra into pump–probe, Higgs mode and bi-Higgs frequency sideband peaks. We find that the higher-order bi-Higgs sidebands dominate above the critical field, which indicates the breakdown of susceptibility perturbative expansion in this parametric quantum matter.

show abstract

“…This process triggers the phase-amplitude dynamics illustrated in Fig. 1a, whose nonlinear interactions determine the THz-MDCS spectral profile 36 .…”

Section: Articlementioning

confidence: 98%

Section: Light-induced Drastic Changes In Collective Modesmentioning

confidence: 99%

Section: Light-induced Drastic Changes In Collective Modesmentioning

confidence: 99%

Section: Gauge-invariant Theory and Simulations Of Thz-mdcs Signalsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Quantum coherence tomography of light-controlled superconductivity

et al. 2022

View full text Add to dashboard Cite

show abstract

Perspectives: Light Control of Magnetism and Device Development

Fang,

Wu,

Zhang

et al. 2024

ACS Nano

View full text Add to dashboard Cite

Accurately controlling magnetic and spin states presents a significant challenge in spintronics, especially as demands for higher data storage density and increased processing speeds grow. Approaches such as light control are gradually supplanting traditional magnetic field methods. Traditionally, the modulation of magnetism was predominantly achieved through polarized light with the help of ultrafast light technologies. With the growing demand for energy efficiency and multifunctionality in spintronic devices, integrating photovoltaic materials into magnetoelectric systems has introduced more physical effects. This development suggests that sunlight will play an increasingly pivotal role in manipulating spin orientation in the future. This review introduces and concludes the influence of various light types on magnetism, exploring mechanisms such as magneto-optical (MO) effects, light-induced magnetic phase transitions, and spin photovoltaic effects. This review briefly summarizes recent advancements in the light control of magnetism, especially sunlight, and their potential applications, providing an optimistic perspective on future research directions in this area.

show abstract

Extreme terahertz magnon multiplication induced by resonant magnetic pulse pairs

Huang,

Luo,

Mootz

et al. 2024

Nat Commun

View full text Add to dashboard Cite

Nonlinear interactions of spin-waves and their quanta, magnons, have emerged as prominent candidates for interference-based technology, ranging from quantum transduction to antiferromagnetic spintronics. Yet magnon multiplication in the terahertz (THz) spectral region represents a major challenge. Intense, resonant magnetic fields from THz pulse-pairs with controllable phases and amplitudes enable high order THz magnon multiplication, distinct from non-resonant nonlinearities such as the high harmonic generation by below-band gap electric fields. Here, we demonstrate exceptionally high-order THz nonlinear magnonics. It manifests as 7th-order spin-wave-mixing and 6th harmonic magnon generation in an antiferromagnetic orthoferrite. We use THz two-dimensional coherent spectroscopy to achieve high-sensitivity detection of nonlinear magnon interactions up to six-magnon quanta in strongly-driven many-magnon correlated states. The high-order magnon multiplication, supported by classical and quantum spin simulations, elucidates the significance of four-fold magnetic anisotropy and Dzyaloshinskii-Moriya symmetry breaking. Moreover, our results shed light on the potential quantum fluctuation properties inherent in nonlinear magnons.

show abstract

Visualization and quantum control of light-accelerated condensates by terahertz multi-dimensional coherent spectroscopy

Cited by 18 publications

References 56 publications

Quantum coherence tomography of light-controlled superconductivity

Quantum coherence tomography of light-controlled superconductivity

Perspectives: Light Control of Magnetism and Device Development

Extreme terahertz magnon multiplication induced by resonant magnetic pulse pairs

Contact Info

Product

Resources

About