Nonlinear responses of nanoparticles induce enlightening phenomena in optical tweezers.With the gradual increase intensity, effects from saturable absorption (SA) and reverse SA (RSA) arise sequence thereby modulate nonlinear properties materials.In current traps, however, underlying physical mechanism is mainly confined within regime because threshold values required to excite RSA are extremely high.Herein, we demonstrate, both theory experiment, tweezing regime, proving that a fascinating...

Spin and orbital angular momenta are two of the most fundamental physical quantities that describe complex dynamic behaviors optical fields. A strong coupling between these leads to many intriguing spatial topological phenomena, where one remarkable example is generation a helicity-dependent vortex converts spin degrees freedom. The spin-to-orbit conversion occurs inherently in lots processes has attracted increasing attention due its crucial applications spin-orbit photonics. However,...

Goblet cells and their secreted mucus are important elements of the intestinal mucosal barrier, which allows host to resist invasion by pathogens. Porcine deltacoronavirus (PDCoV) is an emerging swine enteric virus that causes severe diarrhea in pigs large economic losses pork producers worldwide. To date, molecular mechanisms PDCoV regulates function differentiation goblet disrupts barrier remain be determined. Here, we report newborn piglets, infection barrier: specifically, there villus...

Redistributing the transverse energy flow in focal plane of a tightly focused radially polarized optical field is described. We develop from theory generalized analytical model for calculating distributions electromagnetic and Poynting vector laser beam superposed with an vortex. further explore redistribution by designing phase masks, including traditional annular vortex masks. Flexible control rings obtained these They provide simple solution to transport absorptive particles along certain...

In our work, a InSe-PVA film-type modulator was successfully prepared. Its nonlinear optical properties were investigated and its application for obtaining large-energy mode-locked Er-doped fiber laser also demonstrated. Stable operation with maximum pulse energy of 20.4 nJ at repetition rate 586.3 kHz generated. The average output power 11.96 mW under the pump 560 mW. Our findings suggest that InSe has competitive performance in acting as ultra-fast comparison commonly used two-dimensional...

A three-component reaction of aldehyde-derived hydrazones with DABSO and aryldiazonium tetrafluoroborates is described. Moreover, the photocatalyzed sulfonylation can also be achieved from sulfonyl chlorides.

The cylindrical vector beam (CVB) has been widely studied and applied in recent years. However, many CVB generation methods suffer from complex systems, large-size devices are required. Here, we propose a monolayer chiral metasurface composed of spin-sensitive unit cells which can generate different holograms for left- right-circular polarization based on the combined modulation geometric phase detour phase. With linearly polarized incident beam, CVBs with controllable angles orders, even...

A reductive cross-coupling strategy for the synthesis of sulfone-containing oxindoles was presented. Moreover, using amines instead alkyl bromides, a palladium-catalyzed domino cyclization/aminosulfonylation also established.

Introduction Porcine deltacoronavirus (PDCoV), an emerging swine enteropathogenic coronavirus with worldwide distribution, mainly infects newborn piglets severe diarrhea, vomiting, dehydration, and even death, causing huge economic losses to the pig industry. However, underlying pathogenic mechanisms of PDCoV infection effects on host transcripts metabolites remain incompletely understood. Methods This study investigated a combined transcriptomic metabolomic analysis porcine intestinal...

Surface plasmon polaritons (SPPs) with vortex phase distribution, known as plasmonic vortices, play an important role in several research fields. However, the ultrafast modulation for single and arrays excited by laser, have yet to be studied. Here, we theoretically investigate properties of array femtosecond pulses using analytical FDTD simulations. The vortex/array is a slit (ring-shaped/hexagonal) on gold film, incident light consists two time-delayed sub-pulses carrying same topological...

Spatiotemporal optical vortices (STOVs), as a kind of structured light pulses carrying transverse orbital angular momentum (OAM), have recently attracted significant research interest due to their unique photonic properties. However, general STOV typically exhibit an annular intensity profile in the spatiotemporal plane, with radius that scales topological charge, limiting potential many applications. Here, address this limitation, we introduce concept perfect (PSTOVs). Unlike pulses,...

A palladium-catalyzed three-component 1,3-dienylation of propargylic esters with DABSO and aryl iodides has been developed. This novel reductive cross-coupling reaction produces 2-sufonylated 1,3-dienes as single products in the presence metal Mn high regio- chemoselectivities. Control experiments demonstrated that transformation may undergo a radical process.

To evaluate precise assessment methods for predicting the optimal acetabular cup size in total hip arthroplasty (THA). A clinical data of 73 patients (80 hips) who underwent primary THA between December 2022 and July 2024 met inclusion criteria was analyzed. There were 39 males 34 females with an average age 66.3 years (range, 56-78 years). Among them, 66 cases unilateral 7 bilateral THAs. 29 (34 osteoarthritis, 35 (35 femoral neck fractures, 9 (11 osteonecrosis head. Based on...

We propose a method to generate an optical cage using azimuthal- and radial-variant vector beams in high numerical aperture system. A new kind of beam that has polarization states is proposed demonstrated theoretically. Then, integrated analytical model calculate the electromagnetic field Poynting distributions input derived built based on diffraction theory Richards Wolf. From calculations, full polarization-controlled obtained by simply tailoring radial index polarization, uniformity U...

Porcine epidemic diarrhea (PED), one of the serious enteric diseases caused by porcine virus (PEDV), is responsible for enormous economic losses in global swine industry. However, available commercial vaccines fail to protect pigs from PEDV infection due appearance variants. Hence, it necessary find an effective and cost-efficient natural product infection. In this study, we first found that aqueous leaf extract M. oleifera (MOE) exhibited antiviral activity response Furthermore,...

Dependence of light intensity on energy flow is the most intuitive presentation an optical field. This dependence, however, also limits applications to interaction field with matter. For further insight into this, we demonstrate a novel case field, named as counterintuitive chiral (CCIF), in highly focusing situation: reverses during propagation but distribution pattern kept approximately invariant. Our results show that, this process, mode correlation decreases rapidly while remains...

Abstract The vortex field of surface plasmon polariton with orbital angular momentum (OAM), called plasmonic vortex, has played an important role in various research fields. However, the spatiotemporal properties pulses excited by ultrafast laser, especially dynamics spin‒orbit coupling field, have yet to be investigated deeply. Here, we study modulation vortices coupling, using both analytical and simulation methods. are a ring-shaped lens, incident light composed two time-delayed...