A5055629888- Terahertz technology and applications
- Photonic and Optical Devices
- 2D Materials and Applications
- Perovskite Materials and Applications
- Semiconductor Quantum Structures and Devices
- Plasmonic and Surface Plasmon Research
- Phase-change materials and chalcogenides
- Neural Networks and Reservoir Computing
- Spectroscopy and Quantum Chemical Studies
- Metamaterials and Metasurfaces Applications
- Acoustic Wave Resonator Technologies
- Advanced Fiber Laser Technologies
- Thermal properties of materials
- Topological Materials and Phenomena
- Advanced Semiconductor Detectors and Materials
- Nonlinear Optical Materials Studies
- Optical properties and cooling technologies in crystalline materials
- Advanced Thermoelectric Materials and Devices
- Solid-state spectroscopy and crystallography
- Spectroscopy and Laser Applications
- Nonlinear Optical Materials Research
- Advanced Memory and Neural Computing
Northwest University
2022-2025
Abstract The dispersion characteristics of nonlinear photocurrent response such as shift current, providing crucial information for understanding the optoelectronic properties semiconductors, yet remains relatively unexplored in a broadband region with non‐contact and sensitive experiments. Herein, terahertz (THz) emission spectroscopy is utilized wireless all‐optical method to reveal photon‐energy‐dependent ultrafast current tin telluride（SnTe ）. induced by bulk photovoltaic effect further...
Two-dimensional (2D) materials demonstrate fascinating thickness-dependent optical properties due to their van der Waals interaction and quantum confinement in the linear regime. However, nonlinear response is more complicated as virtual carriers (dipoles) real can be generated by below- above-band-gap excitation, which calls for a comprehensive understanding of these 2D materials. Herein, direct band gap ${\mathrm{Bi}}_{2}{\mathrm{S}}_{3}$ utilized investigate terahertz (THz) emission...
Photocurrent induced by nonlinear optical effects has innovated fundamental optic physics in optoelectronic devices, including photodetectors, absorbers, and solar cells. The cooperative interaction between different kinds of photocurrents would be a complex yet interesting issue. Herein, we have prepared tellurium (Te) nanotube films to study the transient photocurrent utilizing terahertz (THz) emission spectroscopy excited femtosecond pulse laser. THz wave is generated from interplay...
Ferroelectric group-IV monochalcogenides $MX$ ($M=\mathrm{Sn}/\mathrm{Ge}$ and $X=\mathrm{S}/\mathrm{Se}$) are of particular importance for the new-generation photovoltaic devices due to their special in-plane spontaneous polarization resulting in a bulk effect. However, its related dynamical photoresponse under an ultrafast laser excitation rarely studied via noncontact all-optical method. Herein, vertically grown SnS nanosheets have been synthesized by physical vapor deposition (PVD)...
All-optical terahertz (THz) modulators have received tremendous attention due to their significant role in developing future sixth-generation technology and all-optical networks. Herein, the THz modulation performance of Bi2Te3/Si heterostructure is investigated via time-domain spectroscopy under control continuous wave lasers at 532 nm 405 nm. Broadband-sensitive observed within experimental frequency range from 0.8 2.4 THz. The depth reaches 80% laser illumination with a maximum power 250...
Abstract Nonlinear optical materials, especially two-dimensional are anticipated to reveal broadband nonlinearity for future miniaturized photonic applications. Herein, we report a physical vapor deposition method produce β-In 2 Se 3 thin film and investigate the nonlinear absorption ( β ) refraction (n characteristics. The semiconductor shows an excellent with large in 10 cm GW −1 scale n −12 W from visible NIR wavelengths, which superior those of metal carbides nitrides (MXenes)...
Carrier transport capacity with high mobility and long-range diffusion length holds particular significance for the advancement of modern optoelectronic devices. Herein, we have unveiled carrier dynamics properties a pristine violet phosphorus (VP) nanosheet by transient absorption microscopy. Under excitation (2.41 eV) above exciton band, two photoinduced peaks energy difference approximately 520 meV emerge within broadband background which originates from prompt generation free carriers...
Abstract Polarized terahertz (THz) wave generation is of great significance for chiral and anisotropic sensing applications. However, how to manipulate amplitude, polarization, ellipticity the THz still a fundamental challenge. Herein, polarized achieved from bilayer metamaterial consisting T‐shaped structure (TSS) split resonator rings (SRRs) by combining Maxwell hydrodynamic equations. The elliptically can be synthetized directly horizontally vertically components due orthogonal nonlinear...
We have investigated the thermal conductivity and vibration properties of TiS3 nanoribbon via micro-Raman spectroscopy. Based on Raman spectra, calculated temperature coefficients four Ag1 modes sample are −0.0140, −0.0136, −0.0179, −0.0172 cm−1 K−1, respectively, which higher than that traditional nanomaterials graphene MoS2. The frequency shift provides a powerful non-contact method to determine its local rise, is caused by anharmonic coupling phonons. From coefficient power values,...
The carrier dynamics of lead-free cesium tin halide perovskites are crucial for evaluating their potential as substitutes lead-based perovskites. Herein, we investigate the ultrafast transport hot carriers in CsSnBr3 microplates synthesized via chemical vapor deposition. We observe a significantly prolonged cooling process lasting ∼50 ps, due to hot-phonon bottleneck effect and formation large polarons. By employing transient absorption microscopy, detect time-dependent diffusion coefficient...
Abstract Quantum coherence by electronic quantum interference (QI) is significant to generate macroscopic photocurrent without heterostructures in both bulk and low‐dimensional materials. However, the coherent injection QI materials can be veiled other linear or nonlinear optical effects. Herein, ultrafast investigated terahertz (THz) wave generation multilayer rhenium disulfide (ReS 2 ) at nanometer scale under two‐color light excitation. It observed that THz radiation controlled adjusting...
Understanding the nonlinear polarization mechanism of two-dimensional (2D) halide perovskites is essential for developing various optical applications. Herein, terahertz (THz) emission from Ruddlesden-Popper type ${(\mathrm{BA})}_{2}\mathrm{Pb}{\mathrm{I}}_{4}$ and ${(\mathrm{iso}\ensuremath{-}\mathrm{BA})}_{2}\mathrm{Pb}{\mathrm{I}}_{4}$ are investigated by both above-band-gap (400 nm) below-band-gap (800 femtosecond laser excitation. Under excitation, dominant linear photogalvanic effect...