172 citations · 937 across the 21 of their papers we have counts for
21 papers
Nonresonant nonlinear magnonics in an antiferromagnet
Gu-Feng Zhang, Sheikh Rubaiat Ul Haque, Kelson J. Kaj +7
Antiferromagnets exhibit rapid spin dynamics in a net zero magnetic background which enables novel spintronic applications and interrogation of many-body quantum phenomena. The lay…
Frequency-selective terahertz wave amplification by a time-boundary-engineered Huygens metasurface
Fu Deng, Fengjie Zhu, Xiaoyue Zhou +7
Ultrafast manipulation of optical resonance can establish the time-boundary effect in time-variant media leading to a new degree of freedom for coherent control of electromagnetic…
Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2
Xiaoyue Zhou, Fu Deng, Yifan Gao +5
We report on an ultrafast terahertz free-carrier dynamic study of a photo-excited WTe2 thin film. In the photo-excited state, we observe a metastable electronic state featuring neg…
Terahertz parametric amplification as a reporter of exciton condensate dynamics
Sheikh Rubaiat Ul Haque, Marios H. Michael, Junbo Zhu +10
Condensates are a hallmark of emergence in quantum materials with superconductors and charge density wave as prominent examples. An excitonic insulator (EI) is an intriguing additi…
Unconventional ferroelectricity in half-filling states of antiparallel stacking of twisted WSe2
Liheng An, Zishu Zhou, Xuemeng Feng +9
Abstract: We report on emergence of an abnormal electronic polarization in twisted double bilayer WSe2 in antiparallel interface stacking geometry, where local centrosymmetry of at…
Coherent generation and control of tunable narrowband THz radiation from laser-induced air-plasma filament
Xiaoyue Zhou, Yuchen Lin, Yi Chan +2
We report on the proof-of-principle experiment of generating carrier-envelope phase (CEP)-controllable and frequency-tunable narrowband terahertz (THz) radiation from air-plasma fi…
Asymmetric double-pulse interferometric frequency-resolved optical gating for visible-wavelength time-domain spectroscopy
Yi Chan, Fu Deng, Jingdi Zhang
Ultrafast science and technology have brought in burgeoning opportunities to optical metrology, strong-field physics, non-equilibrium physics, etc., through light-matter interactio…
Multi-messenger nano-probes of hidden magnetism in a strained manganite
A. S. McLeod, J. Zhang, M. Q. Gu +9
The ground state properties of correlated electron systems can be extraordinarily sensitive to external stimuli, such as temperature, strain, and electromagnetic fields, offering a…
Dynamics of a Persistent Insulator-to-Metal Transition in Strained Manganite Films
Samuel W. Teitelbaum, Benjamin K. Ofori-Okai, Yu-Hsiang Cheng +5
Transition metal oxides possess complex free energy surfaces with competing degrees of freedom. Photoexcitation allows shaping of such rich energy landscapes. In epitaxially strain…
Nucleation and growth bottleneck in the conductivity recovery dynamics of nickelate thin films
Elsa Abreu, Derek Meyers, Verner K. Thorsmolle +5
We investigate THz conductivity dynamics in NdNiO and EuNiO thin films following a photoinduced thermal quench into the metallic state and reveal a clear contrast between f…
Photo-enhanced metastable c-axis electrodynamics in stripe ordered cuprate LaBaCuO
Kevin A. Cremin, Jingdi Zhang, Christopher C. Homes +6
Quantum materials are amenable to non-equilibrium manipulation with light, enabling modification and control of macroscopic properties. Light-based augmentation of superconductivit…
Electromechanically Tunable Metasurface Transmission Waveplate at Terahertz Frequencies
Xiaoguang Zhao, Jacob Schalch, Jingdi Zhang +4
Dynamic polarization control of light is essential for numerous applications ranging from enhanced imaging to materials characterization and identification. We present a reconfigur…
Ultrafast Electron-Lattice Coupling Dynamics in VO2 and V2O3 Thin Films
Elsa Abreu, Stephanie N. Gilbert Corder, Sun Jin Yun +11
Ultrafast optical pump - optical probe and optical pump - terahertz probe spectroscopy were performed on vanadium dioxide (VO2) and vanadium sesquioxide (V2O3) thin films over a wi…
Terahertz Saturable Absorption in Superconducting Metamaterials
George R. Keiser, Jingdi Zhang, Xiaoguang Zhao +2
We present a superconducting metamaterial saturable absorber at terahertz frequencies. The absorber consists of an array of split ring resonators (SRRs) etched from a 100nm YBaCu3O…
Cooperative photoinduced metastable phase control in strained manganite films
Jingdi Zhang, Xuelian Tan, Mengkun Liu +7
A major challenge in condensed matter physics is active control of quantum phases. Dynamic control with pulsed electromagnetic fields can overcome energetic barriers enabling acces…
Ultrafast terahertz spectroscopy study of Kondo insulating thin film SmB: evidence for an emergent surface state
Jingdi Zhang, Jie Yong, Ichiro Takeuchi +2
We utilize terahertz time domain spectroscopy to investigate thin films of the heavy fermion compound SmB6, a prototype Kondo insulator. Temperature dependent terahertz (THz) condu…
Terahertz radiation-induced sub-cycle field electron emission across a split-gap dipole antenna
Jingdi Zhang, Xiaoguang Zhao, Kebin Fan +5
We use intense terahertz pulses to excite the resonant mode (0.6 THz) of a micro-fabricated dipole antenna with a vacuum gap. The dipole antenna structure enhances the peak amplitu…
Nonlinear terahertz devices utilizing semiconducting plasmonic metamaterials
Huseyin R. Seren, Jingdi Zhang, George R. Keiser +6
The development of responsive metamaterials has enabled the realization of compact tunable photonic devices capable of manipulating the amplitude, polarization, wave vector, and fr…
Phase transition in bulk single crystals and thin films of VO2 by nano-infrared spectroscopy and imaging
Mengkun Liu, Aaron J. Sternbach, Martin Wagner +21
We have systematically studied a variety of vanadium dioxide (VO2) crystalline forms, including bulk single crystals and oriented thin films, using infrared (IR) near-field spectro…
Dynamic conductivity scaling in photoexcited V2O3 thin films
Elsa Abreu, Siming Wang, Gabriel Ramirez +4
Optical-pump terahertz-probe spectroscopy is used to investigate ultrafast far-infrared conductivity dynamics during the insulator-to-metal transition (IMT) in vanadium sesquioxide…
Nonlinear terahertz metamaterials via field-enhanced carrier dynamics in GaAs
Kebin Fan, Harold Y. Hwang, Mengkun Liu +7
We demonstrate nonlinear metamaterial split ring resonators (SRRs) on GaAs at terahertz frequencies. For SRRs on doped GaAs films, incident terahertz radiation with peak fields of…