Xian Qi Lin

Inverse Design of Angle-Stable Pixelated Dual-CP Reflectarrays via Surrogate-Assisted Optimization

Yulei Yang, Yihong Su, Mingtang Li, Yiming Fan et autres

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Highly Efficient Ultrafast Terahertz Modulation Enabled by Unconventional Carrier Dynamics in HgTe Semimetals

Peng Suo, Ziteng Zhang, Yidan Zhang, Long Geng et autres

ABSTRACT Low‐power and high‐speed terahertz (THz) photonic devices are of significant importance for advancing THz technologies, demanding exceptional functional materials to load. In this work, we systematically investigate the transient charge transport dynamics in semimetallic mercury telluride (HgTe) films utilizing optical pump‐THz …

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Transient photoinduced cubic-like phase transition in orthorhombic SnSe

Kaiwen Sun, Xiangqi Liu, Shijie Ma, Peng Suo et autres

SnSe, a low-symmetry layered semiconductor, features weak-interatomic bonding, pronounced anharmonicity, and other characteristics that make it highly attractive for thermoelectric applications. Recent studies have demonstrated that SnSe undergoes a non-thermal phase transition from the Pnma phase to a non-equilibrium Immm phase when …

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Escaping the gavel: How environmental courts drive firms' cross-regional investment

Xin Yang, Jiatong Zhang, Xian Qi Lin, Yun Zhang

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Biocompatible hydrophilic polycarbonate surfaces via picosecond laser processing for improved cell adhesion

Chengxin Yin, Jianqiao Liang, Xian Qi Lin, Binglin Cui et autres

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Terahertz cavity magnon-polaritons in Gd0.5Ho0.5FeO3 single crystals tuned with temperature and magnetic field

Qixin Li, Zhichao Fu, Jiamin Shang, Peng Suo et autres

The strong coupling between photons and magnons, enhanced by an electromagnetic cavity, has garnered significant attention, particularly in the frequency range of terahertz (THz). The hybrid nature of the coupled states provides an ideal platform for developing ever faster and less dissipative …

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Ultrafast Terahertz Emission in Centrosymmetric Films Driven by Nonlinear Photon-Drag Injection Currents

Long Geng, Wenjie Zhang, Qiushi Ma, Peng Suo et autres

The nonlinear injection photocurrent, a second-order photogalvanic effect absent in centrosymmetric structures, can be revived by the photon-drag effect (PDE), leading to efficient terahertz (THz) radiation. Previous studies on THz emission from centrosymmetric films under oblique incidence attributed the effects to PDE-induced …

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Revealing a Nonlinear Photocurrent in the Graphene/MoS2 Heterostructure via Terahertz Emission Spectroscopy

Yifan Cheng, Xian Qi Lin, Chunwei Wang, Zeyu Zhang et autres

Heterostructures composed of graphene (Gr) and transition metal dichalcogenides (TMDs) establish a new platform for optoelectronic applications. A substantial amount of research has concentrated on the interfacial charge transfer (CT) within heterostructures, yet investigations into the nonlinear effects occurring within these heterostructures …

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Observation of transient trion induced by ultrafast charge transfer in graphene/MoS2 heterostructure

Chen Wang, Y. F. Chen, Qiushi Ma, Peng Suo et autres

Van der Waals (vdW) heterostructures constructed from transition metal dichalcogenidess provide an ideal platform for exploring various quasiparticle behaviors, with trion—composed of neutral exciton and charged carrier—being a notable example. There are typically three methods to generate trion: electrical doping, chemical doping, …

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Tracking and manipulating ultrafast photocarrier dynamics in 3D Dirac semimetal Cd 3 As 2 by chemical doping

Peng Suo, Wenjie Zhang, Yunkun Yang, Long Geng et autres

Element doping can break the crystal symmetry and realize the topological phase transition in quantum materials, which enables the precise modulation of energy band structure and microscopic dynamical interaction. Herein, we have studied the ultrafast photocarrier dynamics in Zn-doped 3D topological Dirac …

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Magnon and electromagnon excitations in Dy0.9Nd0.1FeO3 single crystals tuned with temperature and magnetic field

Zhichao Fu, Jiamin Shang, Xian Qi Lin, Peng Suo et autres

Magnon and electromagnon excitations in RFeO3 (where R is a rare-earth element) are associated with the orderings of Fe and R ions, respectively, both of which strongly depend on temperature and applied magnetic field. Herein, by employing the magnetic and electric components …

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Revealing the Fundamental Limit of Gate-Controlled Ultrafast Charge Transfer in Graphene–MoS2 Heterostructures

Chen Wang, Y. F. Chen, Qiushi Ma, Peng Suo et autres

When graphene forms heterostructures with transition metal dichalcogenides (TMDCs), the photons with energy below the TMDCs’ bandgap can be harvested by graphene and injected into TMDCs through ultrafast charge transfer. Controlling and understanding this ultrafast charge transfer are crucial for developing advanced …

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