This paper presents a graphene-Au coated photonic crystal fiber (PCF) sensor in the visible regime. Designing side-polish D-shaped plane over PCF’s defect of periodic air holes can effectively enhance evanescent field. Graphene on gold sensor’s sensitivity because it stably adsorb biomolecules and increase propagation constant surface plasmon polariton (SPP). Using finite element method (FEM), we demonstrated that sensing performance is greatly improved by optimizing geometric structural...

In this paper, a multi-parameter integrated detection photonic crystal fiber (PCF) sensor based on surface plasmon resonance (SPR) is proposed for its application in detecting temperature, magnetic field, and refractive index. The air holes both sides of the core were coated with gold film introduced to temperature-sensitive medium (PDMS) fluid (MF), temperature respectively. graphene layer also presented D-type side polished improve sensitivity. sensor’s critical parameters’ influence...

In this paper, we propose a multi-channel photonic crystal fiber sensor, which adopts dual-polarization and multiple materials to effectively reduce the mutual interference between channels enhance surface plasmon resonance, thus achieving simultaneous detection of with low interference. Four are polished around cylindrical fiber, then different metal films (gold or silver) plasmonic (titanium dioxide, thallium pentoxide, graphene) added sensing area each channel. All detect refractive...

Two-dimensional (2D) materials, which have attracted attention due to intriguing optical properties, form a promising building block in and photonic devices. This paper numerically investigates tunable anisotropic perfect absorber graphene-black phosphorus (BP) nanoblock array structure. The suggested structure exhibits polarization-dependent absorption the mid-infrared, with maximum of 99.73% for x-polarization 53.47% y-polarization, as determined by finite-difference time-domain FDTD...

In this paper, we propose a design of mid-infrared Metamaterial Absorber (MIMA). The MIMA is composed thin metamaterial nanostructure period array cross-circular structure Ti with continuum graphene layer and bottom film Al substrate, the middle dielectric stack Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> SiO xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> . coupling surface...

To achieve high performance and wide range detection, we propose an ultra-wide sensitivity plasmonic fiber optic sensor with a gold (Au) nanowire group array, which has both propagating surface plasmon resonance (PSPR) local (LSPR) sensing characteristics. The PSPR, LSPR, PSPR+LSPR are presented as Au thin layers, spheres (or nanowires), arrays, respectively, their respective properties analyzed from theoretical, simulated, numerical aspects. When detection is performed, the presence of...

In this study, we present a chiral metasurface structure based on graphene-Au elliptical hole arrays. Circular dichroism of up to 0.91 is achieved by varying the rotation angle hole. (CD) typically expresses response. The has excellent absorption right circularly polarized light while reflecting left light, and it theoretically analyzed using Jones matrix. By incorporating graphene between gold array dielectric, CD can be finely tuned. response decreases from 0.88 0.55 when Fermi energy...

By coating graphene oxide (GO) onto the surface no-core fiber (NCF), we designed a single-mode (SNS) Step-Index Distribution sucrose sensor. With wavelength demodulation and beam propagation method (BPM), sensor without GO was studied in low RI range of 1.33~1.389, high 1.389~1.4185. The experiments show that sensitivity respectively reaches 132.9 nm/RIU 292.22 nm/RIU. Both numerical simulation are highly consistent with theoretical analysis results. Especially, having coated on NCF for...

In this paper, a facile and cost effective hydrothermal method was employed to fabricate high performance ZnO/β-Ga2O3 core-shell heterostructures. A highly sensitive ultraviolet (UV) sensor fabricated based on vertically aligned β-Ga2O3 decorated ZnO nanorod arrays (NRs). The heterostructures showed an excellent improvement in UV response characteristics comparing with bare NRs. It can be attributed the lower interface barrier larger surface area-to-volume ratio for Meanwhile, higher...

• A LDMOS with substrate field plate and variable-k dielectric layer is proposed. The connected to the through silicon window. BV dramatically improved due electric modulation of SFP VKBL. auxiliary depletion effect effectively reduces R on,sp . alleviates self-heating effect. novel silicon-on-insulator (SOI) lateral double-diffused metal-oxide-semiconductor (LDMOS) structure has been new features a (SFP) buried (VKBL). VKBL improve breakdown voltage by introducing peaks in surface...

Theoretical studies of ultra-thin silicon solar cells with cylindrical, conical and parabolic surface nanostructures inherited from natural self-assembled anodic alumina oxide (NSA-AAO) were performed by finite-difference time-domain (FDTD) method. All nanostructured obtained an optimized efficiency enhancement as high more than 33% comparing that the anti-reflective (AR) one. Numerical results reveal range efficient structural parameters for (e.g., cylindrical) cell can be effectively...

In this paper, we demonstrated a Fano resonant superlattice metasurface structure composed of bilayer trimeric metallic stripes in each unit cell. It can simultaneously support two types resonances, which individually possesses electric and magnetic properties at microwave frequencies, respectively. The resonance is generated by the anti-phase mode interfering with in-phase mode, while stems from interference between modes gap area layer metasurface. addition, double resonances are readily...

An asymmetric trimeric slit metasurface structure is proposed herein, which generated independently tunable double Fano resonances (DFRs), namely, Fano1 and Fano2. Rigorous simulations experimental scanning near-field demonstrated that the non-radiative dark mode produces Fano1, while magnetic toroidal generates peak The mechanisms of two infer interference fields can be tuned by different geometric parameters. separate tuning DFRs simultaneously in metasurface. These results imply potential...

A novel silicon-on-insulator (SOI) high breakdown voltage (BV) power device with interlaced dielectric trenches (IDT) and N/P pillars is proposed. In the studied structure, drift region folded by IDT embedded in active layer, which results an increase of length ionization integral remarkably. The crowding phenomenon electric field corner relieved pillars. Both traits improve two key factors BV, magnitude, thus BV significantly enhanced. layer enhanced a major portion bias borne oxide due to...

A novel SiC/Si heterojunction lateral double-diffused metal-oxidesemiconductor (LDMOS) with a reversed L-shaped field plate and stepped oxide layer has been proposed to improve the tradeoff between breakdown voltage (BV) specific on-resistance (Ron,sp). The is applied modulate electric distribution make occur in low area (SiC/Si interface), which increases BV decreases Ron,sp of device. Furthermore, used cover Si drift region reshape by introducing new peak, consequently enhances BV....

Asymmetric transmission (AT) is useful for polarization manipulation. We report narrowband AT that utilizes a triple-layered symmetric trimeric metasurface with near-field coupling of the dark mode Fano resonance. The strength was tuned by using mid-layer to break dim between two slit layers. peak linearly polarized waves and percentage bandwidth reached 0.7719 1.26% (numerical simulations) 0.49 1.9% (experiments), respectively. Coupled-mode theory field patterns are utilized explain...

An on-chip integrated silica variable multiplexer (VMUX) cannot be practically packaged as the involved optical attenuator (VOA) is associated with a large amount of heat change and arrayed waveguide grating (AWG) sensitive to temperature change. On basis our success in substantially reducing VOA's power consumption, we have introduced an idle heater for each VOA channel balance its attenuation-associated keep whole under constant working power. Consequently, 40-channel AWG-VOA VMUX can...

The effects of HfO2-Al2O3 laminate structures on the equivalent oxide thickness (EOT), interface characteristics and leakage current properties are investigated InP substrates. Ti introduced in MOS capacitors, which present an approximately 1 nm EOT. Compared with Al2O3/HfO2 structure, Al2O3/HfO2/Al2O3 structure exhibits many advantages border trap density, density gate substrate. peak transconductance drive buried InGaAs MOSFETs a 0.8 Al2O3/3 HfO2/0.5 Al2O3 dielectric layer increased by 41%...

We proposed a sandwich structure to realize broadband asymmetric transmission (AT) for both linearly and circularly polarized waves in the near infrared spectral region. The composes of silica substrate two sand-clock-like gold layers on opposite sides substrate. Due surface plasmons gold, shows that AT parameters can reach 0.436 0.403, respectively. Meanwhile, property is presented parameter over 0.3 between 320 THz 340 THz. realizes diode-like wave forward backward, magnetic dipoles...