We demonstrate a single-camera imaging system that can simultaneously acquire brightfield, darkfield, and phase contrast images in real time. Our method uses computational illumination via programmable light-emitting diode (LED) array at the source plane, providing flexible patterning of angles. Brightfield, differential are obtained by changing LED patterns, without any moving parts. Previous work with was only valid for static samples because hardware speed not fast enough to meet...

Abstract The next generation of high-capacity, multi-task optical informatics requires sophisticated manipulation multiple degrees freedom (DoFs) light, especially when they are coupled in a non-separable way. Vector beam, as typical state between the spin and orbital angular momentum DoFs, mathematically akin to entangled qubits, has inspired multifarious theories applications both quantum classical regimes. Although qubit rotation is vital ubiquitous operation informatics, its analogue...

Optical spatial differentiation is a typical operation of optical analog computing and can single out the edge to accelerate subsequent image processing, but in some cases, overall information about object needs be presented synchronously. Here, we propose multifunctional device based on structured chiral photonic crystals for simultaneous realization real-time dual-mode imaging. This differentiator realized by self-organized large-birefringence cholesteric liquid crystals, which are...

ABSTRACT A multifunctional surface‐enhanced Raman scattering substrate Fe 3 O 4 @AgNPs@MIL‐101 was prepared. Rapid SERS detection of pesticide residues realized by direct pre‐enrichment and separation on the peel surface. MIL‐101 has an ortho‐octahedral framework large pore size, which endowed with ability to rapidly adsorb separate positively charged targets. The introduction tannic acid in situ growth AgNPs backbone, modulate electromagnetic enhancement. Pesticide molecules were adsorbed...

Physics-informed neural networks (PINNs) have shown promise in solving partial differential equations (PDEs), with growing interest their energy-efficient, real-time training on edge devices. Photonic computing offers a potential solution to achieve this goal because of its ultra-high operation speed. However, the lack photonic memory and large device sizes prevent real-size PINNs chips. This paper proposes completely back-propagation-free (BP-free) highly salable framework for silicon...

Recent advances in planar optics with geometric phase superstructures have brought an alternative paradigm the control of structured light and, particular, substantially enhanced capabilities generating and detecting orbital angular momentum (OAM) states associated spatial modes. However, modal interface that can reciprocally link OAM via adiabatic access higher-order remains absent optics. In this work, we propose experimentally demonstrate a optical astigmatic retarder fabricated...

This letter presents a miniaturized geodetic choke ring antenna for high-precision Global Navigation Satellite System applications. The consists of crossed dipoles that are fed by two coaxial feedlines, resonant over the dipoles, cavity-backed reflector with saw-tooth structure, and ring. alongside structure can improve front-to-back ratio (FBR) almost 10 dB. proposed achieves gain 7 dBic, high FBR greater than 25 dB, an operating band covering 1.17-1.60 GHz in which return loss is lower -10...

A radio frequency memory (RFM) based on microwave photonic mixing and digital RFM is proposed demonstrated. By introducing the mixing, operational range largely extended. Besides, spurs are effectively suppressed, which important to guarantee system efficiency avoid generating significant feature for jamming recognition. Meanwhile, by applying RFM, flexible modulation reconstruction achieved. proof-of-concept experiment carried out. The wide working from C- Ka- bands over 0–40 GHz...

The relatively stable lunar illumination may be used to realize radiometric calibration under low light. However, there is still an insufficient understanding of the accuracy models and influence parameters when conducting research on low-light calibration. Therefore, this study explores applicability three atmospheric radiative transfer different nighttime conditions. simulation accuracies (Night-SCIATRAN, Night-MODTRAN, Night-6SV) were evaluated using visible-infrared imaging radiometer...

Carbon dioxide (CO2) levels outside of the physiological range are frequently encountered in tumor microenvironment and laparoscopic pneumoperitoneum during clinical cancer therapy. Controversies exist regarding biological effects hypercapnia on proliferation metastasis concerning time frame, CO2 concentration, cell type. Traditional control gaseous microenvironments for growth is conducted using culture chambers that allow a single gas concentration at time. In present paper, Hela cells...

The interpretation of the variability and determinants erythrocyte oxygenation is complicated by multiple interacting factors manifesting gaseous fluidic microenvironments during microcirculation. In this paper, a multifunctional microdevice was developed for quantitatively extracting dominant role RBC concentration, local oxygen (O2), fluid dynamics in an ex vivo setting. Serial dilution RBCs achieved repeated splitting mixing source suspension solutions bifurcating serpentine...

Backward propagation (BP) is widely used to compute the gradients in neural network training. However, it hard implement BP on edge devices due lack of hardware and software resources support automatic differentiation. This has tremendously increased design complexity time-to-market on-device training accelerators. paper presents a completely BP-free framework that only requires forward train realistic networks. Our technical contributions are three-fold. Firstly, we present...

Abstract Magnetic Pd–Ni bimetals with various compositions were synthesized by a one‐pot reaction, in which chain‐like formed through the self‐assembly of nanoparticles. The behaviour gradually changes composition. nanoparticles form simple chains at lower Pd content, while take on beads‐on‐string structure composed sphere‐shaped Pd–Ni‐nanoparticle assemblies higher content. hysteresis loops show that Ni‐rich have saturation magnetization than Pd‐rich assemblies. formation mechanism for...

Thorium is three to four times as abundant uranium, providing a potentially large, reliable long-term supply of clean energy, if it exploited. In high temperature nuclear systems, molten salts have many attractive advantages coolant. Prior work homogenous core model indicated that the liquid-salt-cooled solid-fuel fast reactor (LSFR) could achieve self-sustained based on thorium fuel with exciting neutronic performance. To further explore this concept, assembly design and heterogeneous LSFR...

We demonstrated an AlGaN/GaN high electron mobility transistor (HEMT) namely double- V th coupling HEMT (DVC-HEMT) fabricated by connecting different threshold voltage ( ) values including the slant recess element and planar in parallel along gate width with N 2 O plasma treatment on region. The comparative studies of DVC-HEMT Fin-like same wafer show significantly improved linearity transconductance G m radio frequency (RF) output signal characteristics DVC-HEMT. device shows plateau larger...

Abstract The multifaceted nature of photodynamic therapy (PDT) requires a throughout evaluation multitude parameters when devising preclinical protocols. In this study, we constructed MCF‐7 human breast tumor spheroid assays to infer PDT irradiation doses at four gradient levels for violet light 408 nm and red 625 under normal hypoxic oxygen conditions. compacted three‐dimensional (3D) models conferred resistance as compared monolayer cultures due heterogenous distribution photosensitizers...

In recent years, transition metal dichalcogenides (TMDs) have been widely used as saturable absorbers (SAs) in ultrafast fiber lasers. Among them, we chosen manganese sulfide (MnS), also a type of TMD, for its small bandgap and excellent nonlinear optical properties. this paper, fabricated MnS thin film absorber demonstrated passively Q-switched erbium-doped laser based on MnS. It has achieved stable short-pulsed output. With pump power 29.8 mW from 980 nm semiconductor laser, obtained...

Abstract Aiming at the problem that azimuth echoes of forward‐looking scanning imaging are aliased and angular information different targets cannot be directly separated, resulting in low resolution, authors propose a method based on modulation pulse compression this paper. Firstly, coupling slow‐time angle is utilised to transmit time‐varying azimuth‐modulated pulses while beam scanning, phase demodulation performed during echo processing; then used accumulate effective power obtain...

In order to solve the problem that array beampattern varies greatly with angle during spatial scanning, this paper presents a synthesis method of conformal based on “spatial-variability (SV)” suppression. obtain stable beampattern, convex optimization is used weighted value amplitude and phase elements under condition satisfying set beam gain threshold so optimized main lobes beams different directions approach lobe reference beam. Since dimensions have broadening degrees after optimization,...