Abstract Diamond is emerging as an attractive third‐generation wide‐bandgap semiconductor for future on‐chip nonlinear photonics and quantum optics due to its unique thermal, optical, mechanical properties. However, the light‐driven current under below‐band gap excitation from second‐order optical effect in diamond still challenging. Herein, a giant photocurrent observed chemical vapor deposition (CVD) by utilizing terahertz (THz) emission spectroscopy. This ultrafast originates photon drag...

Background The relationship between abnormal renal function and serum uric acid levels in patients with acute ischemic stroke (AIS) remains insufficiently explored. Although is associated cardiovascular cerebrovascular risk, the specific link normalized (SUA/SCr) recurrence impaired has not been well studied. This study aims to fill this gap by investigating association SUA/SCr 1-year AIS function. Methods utilized ratio of (SUA) creatinine (SCr) represent SUA for Abnormal Renal was defined...

Nonvolatile control over the physical state of polar materials through all-optical methods has been a long-standing objective pursued in optoelectronics. Photoferroelectric semiconductors exhibit immense potential capturing multimodal nonvolatile states, attributed to their spontaneous and reversible in-plane out-of-plane polarizations. Herein, we uncover an unprecedented nonvolatile, zero-bias, ultrafast photocurrent hysteresis response with innovative approach, discerned by analyzing...

The surface-charge region of bulk and monolayer MoSe2 is analyzed directly by terahertz (THz) surface emission spectroscopy in a nondestructive way. Both nonlinear optical polarization field-induced photocurrent contribute to the THz radiation both MoSe2. first mechanism due rectification second one photogenerated carriers accelerated depletion field. contribution from basically same for because symmetry at surface. However, ∼94.2% it goes down 74.5% This larger field (∼2.54 × 107 V/m)...

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...

We investigated the terahertz (THz) radiation mechanism of layered tin sulfide (SnS2) crystal via THz emission spectroscopy. Under non-resonant excitation, generation from SnS2 is mainly due to optical rectification effect, which verified by azimuthal angle, polarization and pump fluence dependence signals. Further incident angle dependent signals suggest that progress happened at surface with both in-plane out-of-plane photon-induced dipoles. This work puts forward spectroscopy as a...

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...

Graphene/semiconductor heterostructures demonstrate an improvement of traditional electronic and optoelectronic devices because their outstanding charge transport properties inside at the interfaces. However, very limited information has been accessed from interfacial by measurement. Herein, we present active THz surface emission spectroscopy for interface build-in potential detrapping time constant evaluation graphene on SiO2/Si (Gr/SiO2/Si). The generation presents intuitive insight into...

Coherent polarization control of terahertz (THz) wave radiation in both the time-domain and frequency-domain is significant information technology, material science, spectroscopic analysis. Elliptically polarized THz generally limited to chiral materials induced by circularly light excitation. Herein, we demonstrate coherent elliptically from few-layer tungsten diselenide (WSe2) under linearly femtosecond laser This elliptical mainly dominated in-plane anisotropic shift current out-of-plane...

This prospective observational study with a control group aimed to compare the plasma levels of long non-coding RNA (lncRNA) LIPCAR between patients acute cerebral infarction (ACI) and healthy controls, assess prognostic abilities for adverse outcomes ACI at 1-year follow-up. Eighty ACI, whom 40 had large artery atherosclerosis (LAA) cardioembolism (CE) who were hospitalized Xi'an No. 1 Hospital from July 2019 June 2020, selected as case group. Age- sex-matched non-stroke same hospital...

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)...

Abstract Background and purpose Considering the reliance of serum uric acid (SUA) levels on renal clearance function, its role in stroke outcomes remains controversial. This study investigated association function–normalized SUA (SUA to creatinine ratio, SUA/SCr), a novel function index, with 1‐year patients acute ischemic (AIS). Methods is prospective, multicenter observational study. Renal were determined by calculating ratio SCr. One‐year included recurrence, all‐cause mortality, poor...

Surface nonlinear optical response of layered tin disulfide (SnS2) is investigated by terahertz (THz) emission spectroscopy using a femtosecond photoexcitation at 400 nm. Under above-bandgap excitation, we distinguish the surface rectification, electric field (SEF)-induced and SEF-induced drift photocurrent. The pump fluence dependence THz demonstrates saturation effect due to electrostatic screening high photocarrier density on surface. Theoretical calculations suggest that rectification...

<b><i>Introduction:</i></b> The triglyceride-glucose (TyG) index is reported to be related poor functional outcomes and all-cause mortality post-stroke. However, the association between TyG recurrent stroke after acute ischemic (AIS) has not been well described. We aimed identify whether was associated with 1-year AIS. <b><i>Methods:</i></b> Baseline patient information collected at admission, calculated. Recurrent events were followed up 1, 3,...

Photodoping as a nonvolatile and reversible method can be used to modify the carrier distribution at heterojunction interface. Herein, we explore 2D/3D van der Waals (vdW) graphene/silicon (G/Si) heterostructure in real time by terahertz (THz) emission spectroscopy. Photoinduced doping is introduced continuous wave laser, which leads screening effect built-in electric field The resulting decrease transient photocurrent reduces THz amplitude from G/Si heterostructure. photoinduced suggests...

Metallic heterostructure as promising terahertz (THz) spintronic emitters has promoted the development of both spintronics and THz science. However, underlying physics at metallic interface, such nonlinear optical effect, remains unclear. Herein, we present interface magnetization induced generation from consisting Heusler alloy CoFeMnSi (CFMS) Pd thin films. is ascribed to 35% contribution magnetization-induced rectification (MOR) 65% inverse spin Hall effect (ISHE) based on pump...

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 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...

Abstract Background Sporadic studies have examined the impact of OSA on ACS patients by homocysteine (Hcy) level. This study attempted to comprehensively evaluate effects interaction between Hcy and long-term cardiovascular outcomes in patients. Methods In this prospective, large-scale cohort study, 2160 admitted for were recruited undergo overnight sleep monitoring. was diagnosed when apnea–hypopnea index ≥ 15 events/h. Patients with normohomocysteinemia (NHcy) defined as having serum ≤...

Palladium diselenide (PdSe2) exhibits air stability, low symmetry, and high carrier mobility, resulting in unique in-plane anisotropy for polarized optoelectronic devices. However, the relationship of symmetry terahertz (THz) radiation remains elusive yet significant both THz source technology nonlinear optical physics science. Herein, we observed large anisotropic from multilayer PdSe2 under femtosecond laser excitation. The emission demonstrates 2α dependence on polarization angle resonant...

H-type hypertension has a high prevalence in China. However, the association of serum homocysteine levels with 1-year stroke recurrence patients acute ischemic (AIS) and not been studied.A prospective cohort study AIS admitted to hospitals between January December 2015 Xi'an, China, was conducted. Serum levels, demographic data, other relevant information were collected from all upon admission. Stroke recurrences routinely tracked at 1, 3, 6, 12 months after discharge. The blood level...

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,...

Objective: This study was aimed at investigating the effects of neutrophil-to-lymphocyte ratio (NLR) on long-term prognosis patients with acute coronary syndrome (ACS) and obstructive sleep apnea (OSA). Methods: prospective enrolled ACS OSA Anzhen Hospital between June 2015 January 2020. defined by an apnea-hypopnea index ≥15 events·h −1 . Baseline NLR classified as high or low, according to median. The primary endpoint major adverse cardiovascular events (MACE), comprising death, recurrent...

The photon-electron interactions are generally volatile and the intricate multiphysics details of photoexcited carrier dynamics not yet distinguished. How to nonvolatile control physical state through all-optical means clarify processes has been a long-term goal pursued in polar materials. Photoferroelectric {\alpha}-In2Se3 holds great potential for capturing multimodal states due spontaneous reversible in-plane out-of-plane polarizations its tunable light-matter arising from electronic...