Plasmonic nanostructures have a great potential for enhancing light absorption of organic solar cells (OSCs). Our previous work has demonstrated that OSCs with thin active layer can be significantly increased 1-D short-pitched metal grating, but the enhancement is sensitive to polarization and vanishes when thicker than 60 nm. In this work, we extend grating into 2-D space, specifically, metallic nanocylinders packed in hexagonal array embossed at silver cathode. Numerical calculations...

Abstract Active plasmonic nanostructures have garnered considerable interest in physics, chemistry, and material science due to the dynamically switchable capability of responses. Here, first electrically dynamic control magnetic plasmon resonance (MPR) through structure transformation by selective deposition lithium on a metal–insulator–metal (MIM) is reported. Distinct optical switching between MPR surface polariton (SPP) excitations can be enabled applying proper electrical current...

Here, we present a graphene-based long-wavelength infrared photodetector, for enhancing the absorption of which design consists magnetic- and electric-plasmon resonators metasurface to excite graphene surface-plasmonic polaritons (SPPs). Through tuning Fermi energy achieve distinct resonances in matching frequency, peak absorbance exceeding 67.2% is confirmed, even when lossy dielectric used, field angle view up 90°. If different carrier mobility, then frequency lockable, device always can...

Here we present a broadband all-dielectric metasurface absorber, where elliptical nanohole arrays are entirely embedded into the doped device layer of silicon-on-insulator wafer. From intraband carrier transitions, exhibits enhanced near infrared absorption with 3-dB bandwidth ∼ 35.3 nm. By method detailed multipole decomposition, find that magnetic dipole resonances predominantly contribute to enhancement; in addition, large is attributed superposition multiple peaks from resonances. The...

Polarization-sensitive narrowband photodetection at near-infrared (NIR) has attracted significant interest in optical communication, environmental monitoring, and intelligent recognition system. However, the current spectroscopy heavily relies on extra filter or bulk spectrometer, which deviates from miniaturization of on-chip integration. Recently, topological phenomena, such as Tamm state (OTS), provided a new solution for developing functional photodetection, we experimentally realized...

Optical skyrmions have attracted great attention for the potential applications in novel information storage and communication. It is of significance to get insight into generation optical by surface waves. Here, we paid greater emphasis on influence geometry coupling structure formation skyrmions. are constructed from superposition interfering plasmons excited polygon trenches Ag film. The results show field texture mainly determined excitation structure, with distinct properties revealed...

We design, fabricate and analyze plasmon-enhanced LEDs with the tapered Ag structure that significantly increases plasmonic coupling efficiency at a distance far beyond penetration depth. The electroluminescence intensity showed 16-fold increase compared planar of 100 nm. enhanced large is originated from accumulated SP energy metal conical tip missing momentum provided by corrugated surface. Therefore, SP-enhanced LED can maintain high luminous stable working state even thick p-GaN layer,...

As the hole mobility increases with free carrier absorption (FCA), heavily doped p-type silicon has emerged as a promising candidate for detecting near-infrared (NIR) light photonic energy below semiconductor bandgap, and hot-carrier photodetector is capable of high responsivity approaching commercially available devices. To enhance performance-related FCA semiconductor, here we demonstrate an all-silicon metasurface absorber designed in nanohole arrays present in-depth analysis on...

Here, we demonstrate an all-silicon photonic switch, working at infrared communication wavelength and pumped by spatial light, where a ring resonator metasurface absorber are both designed in crystals monolithically integrated on silicon-on-insulator wafer. Through selective doping, the gets pump absorption completely different from near zero of resonator. Based thermo-optical effect, device is capable tuning guided mode $\sim{341}\;{\rm pm/mW}$∼341pm/mW switching time $ {\lt}...

In this paper, we study and establish the theoretical model of thermal stress damage dielectric film in film/substrate systems caused by long-pulse laser, based on which transient distributions temperature field are simulated using finite element method(FEM) then analyze mechanism damage. accordance with basic equation heat conduction equation, physical substrate is developed assumption that isotropic their parameters do not change temperature. On foundation analysis, under laser irradiation...

Surface phonon polaritons (SPhPs) supported by polar dielectrics have been a promising platform for nanophotonics in mid-infrared spectral range. In this work, the temporal dynamic behavior of dielectric nanoparticles without (or with) spatial dispersion/nonlocality driven ultrashort Gaussian pulses is carried out. We demonstrate that three possible scenarios evolutions dipole moment including ultrafast oscillations with decay, exponential and keeping shape exist, when pulse duration...

Blackbody emission such as the from incandescent sources usually possesses a broadband spectrum covering whole infrared wavelength range. Most of energy goes into unwanted range and consequently causes low efficiency. Recently, metasurfaces with two-dimensional subwavelength artificial nanostructures have been widely studied due to their flexibility in modulating optical properties, thus providing an ideal platform for controlling thermal emission. The use synthetic dimension methods has...

Based on product design systematic and modularization, aiming at an unknown working environment, the research of snake robot creates a new field for bionic research. requirements such as small size, multi-degree freedom, light, simple, reliable, cheap easy to install maintain, we developed robot. The is made up same modules able complete various movement methods in their special connection ways. can move by serpentine locomotion cross obstacles. With technology matures, it will be smaller...

Chemical polishing of Q235 steel workpiece using H2O2as oxidant in chemical solution was studied. The effects quantity components such as brightening agent, corrosion inhibitor, and stabilizer well the time temperature were investigated. optimized composition process condition obtained follows: 14mL H2O2(30%), 2mL H2SO4 (98%), 10g citric acid, 3.5g urea, 2g PEG 6000, water added to 1000mL , at room 90~130s.

Abstract Here we present a graphene-based long-wavelength infrared modulator characteristic of extra-high contrast, where the frequency detuning degree magnetic and electric surface plasmons (SPs) is controllable by gated graphene Fermi energy. If device designed to work in strong SP-coupling regime selecting an appropriate low-lossy gate dielectric thickness, modulation depth (MD) up ∼100% but insertion loss (IL) as low ∼−0.37 dB achievable. Moreover, compromised MD > 90% with IL <...

Lower limb rehabilitation exoskeletons (LLREs) are widely researched to assist patients with lower function injury, but there is a lack of researches on modes help exercise balance ability. In response this deficiency, the prototype LLRE introduced in paper, including design mechanical, electrical and control systems. The kinematic models leg abduction mechanism (LAM) unilateral mechanical established, their workspaces analyzed. Based prototype, an innovative mode integrating standing...

This article introduces the placing signage and high-voltage trigger system of extracorporeal cardiac shock wave treatment instrument.The is composed a solenoid coil, cylindrical sheet metal parabolic reflection cup.The pushed sharply by electromagnetic force to generate which can treat myocardial ischemia symptoms with its mechanical cavitation in human tissues.The energy output formula derived.The provides electrical impulses coil cause an induction signage.The includes booster module,...

Within Reststrahlen bands of polar semiconductors, surface phonon–plasmon coupling is great interest in infrared nanophotonics. Here, we demonstrate an active long-wavelength device graphene integrated with AlN/SiC heterostructure. As a low-loss dielectric design, the subwavelength structure takes advantage interfacial photogating effect on electrostatic doping and interfaced SiC, tunable spectral behavior originated from hybridization doping-dependent resonances. This finding provides...

The drilling fluid in wet boreholes is a key problem the process of XRF logging work, limiting accuracy, precision and limit situ determination concentrations elements. A combination mechanics drill hole probe (hardware) with technical methods (software) has been adopted for overcoming influence fluids, which makes it possible to operate holes determining concentration lower atomic number For hardware, short arm proportional counter detector (45 cm) divided from (300 designed constructed can...

An active hybrid-material longwave infrared absorber based on graphene ribbon array (GRA) was studied. Each pair of the ribbons is conducted by lossy metal. Simulation results reveal that its absorption peak in resonance broader than GRA with no metal conduction, and wavelength can be tuned varying chemical potential GRA.

Here we present the design and performance of tunable dual-band wide-angle perfect absorber, consisted graphene VO2. Simulation results show device operating in long-wave infrared region. The two absorption peaks, including location intensity, can be tuned a wide range by either electrical, thermal, or their combination.