Light-induced collective pseudospin precession resonating with Higgs mode in a superconductor

R Matsunaga, N Tsuji, H Fujita, A Sugioka, K Makise… - Science, 2014 - science.org
Superconductors host collective modes that can be manipulated with light. We show that a
strong terahertz light field can induce oscillations of the superconducting order parameter in …

Theory of Anderson pseudospin resonance with Higgs mode in superconductors

N Tsuji, H Aoki - Physical Review B, 2015 - APS
A superconductor illuminated by an ac electric field with frequency Ω is theoretically found to
generate a collective precession of Anderson's pseudospins, and hence a coherent …

Terahertz second-harmonic generation from lightwave acceleration of symmetry-breaking nonlinear supercurrents

C Vaswani, M Mootz, C Sundahl, DH Mudiyanselage… - Physical Review Letters, 2020 - APS
We report terahertz (THz) light-induced second harmonic generation, in superconductors
with inversion symmetry that forbid even-order nonlinearities. The THz second harmonic …

Nonlinear optical effects and third-harmonic generation in superconductors: Cooper pairs versus Higgs mode contribution

T Cea, C Castellani, L Benfatto - Physical Review B, 2016 - APS
The recent observation of a transmitted THz pulse oscillating at three times the frequency of
the incident light paves the way to a powerful protocol to access resonant excitations in a …

Analogues of nonlinear optics using terahertz Josephson plasma waves in layered superconductors

S Savel'ev, AL Rakhmanov, VA Yampol'skii, F Nori - Nature Physics, 2006 - nature.com
Electromagnetic waves in layered superconductors are known as Josephson plasma waves
(JPWs). An important property of JPWs is the gap in their energy spectrum: JPWs can …

Quantum coherence tomography of light-controlled superconductivity

L Luo, M Mootz, JH Kang, C Huang, K Eom, JW Lee… - Nature Physics, 2023 - nature.com
The coupling between superconductors and oscillation cycles of light pulses, ie, lightwave
engineering, is an emerging control concept for superconducting quantum electronics …

Lightwave-driven gapless superconductivity and forbidden quantum beats by terahertz symmetry breaking

X Yang, C Vaswani, C Sundahl, M Mootz, L Luo… - Nature …, 2019 - nature.com
Light-induced supercurrents chart a path forward for the electromagnetic design of emergent
materials phases and collective modes for quantum engineering applications. However …

Higgs mode in superconductors

R Shimano, N Tsuji - Annual Review of Condensed Matter …, 2020 - annualreviews.org
When the continuous symmetry of a physical system is spontaneously broken, two types of
collective modes typically emerge: the amplitude and the phase modes of the order …

Terahertz control of many-body dynamics in quantum materials

CJ Yang, J Li, M Fiebig, S Pal - Nature Reviews Materials, 2023 - nature.com
Quantum-mechanical phenomena underpin the behaviour of quantum materials at the
microscopic level. The description of several essential properties of these materials …

Nonlinear optical response of collective modes in multiband superconductors assisted by nonmagnetic impurities

Y Murotani, R Shimano - Physical Review B, 2019 - APS
In multiband superconductors, multiple collective modes exist associated with the multiple
order parameters. Oscillations of the amplitude and the relative phase of the order …