This study presents a comprehensive solution for precise and timely pest monitoring in field environments through the development of an advanced rice detection system based on YOLO-RMD model. Addressing critical challenges real-time accuracy environmental adaptability, proposed integrates three innovative components: (1) novel Receptive Field Attention Convolution module enhancing feature extraction complex backgrounds; (2) Mixed Local Channel balances local global features to improve...

Abstract Graphene perfect absorbers with ultranarrow bandwidth are numerically proposed by employing a subwavelength dielectric grating to excite the guided-mode resonance of one-dimensional photonic crystals (1DPCs). Critical coupling 1DPCs graphene can produce absorption 0.03 nm. The quality factor peak reaches ultrahigh value 20000. It is also found that resonant peaks be tuned controlling dispersion line guided mode and period grating. When parameters suitably set, any randomly chosen...

Data storage with ultrahigh density, ultralow energy, high security, and long lifetime is highly desirable in the 21st century optical data considered as most promising way to meet challenge of storing big data. Plasmonic coupling regularly arranged metallic nanoparticles has demonstrated its superior properties various applications due generation hot spots. Here, discovery polarization spectrum sensitivity random spots generated a volume gold nanorod assembly reported. It that...

Substituting rubber particles for a portion of the standard coarse aggregates in concrete is regarded as sustainable solution tackling issue waste-tires disposal. In order to assess structural performance (RC), many studies have been conducted on proportions, mechanical properties, curing conditions, usages, and serviceability material over decades. This review systematically summarizes properties (e.g., static dynamic), testing method, durability RC, emphasizing its dynamic characteristics...

Yolk–shell magnetic hollow mesoporous silica nanospheres were synthesized in one-step <italic>via</italic> electrostatic self-assembly for controlled release diagnosis and therapy.

Dually guided-mode-resonant graphene perfect absorbers are numerically proposed by placing grips on dielectric subwavelength grating that is backed one-dimensional photonic crystals (1DPCs). By optimizing parameters of the grating, absorption with a narrow bandwith 1.1 nm achieved at wavelength 632.8 nm. The attributed to dual excitation guided-mode resonance both and 1DPCs. When this type absorber used in refractive index sensors, figure merit reaches as high 124, value much higher than...

Microcavity is an efficient approach to manufacture colorful semitransparent organic solar cells (ST-OSCs) with high color purity by tailoring the transmission spectrum narrow peaks. However, in this type of devices, power conversion efficiency (PCE) and peak transmittance are not yet simultaneously achieved. This paper proposes a new microcavity structure achieve ST-OSCs both PCE transmittance, which hybrid Au/Ag electrode used as mirror WO3 spacer layer. First, it demonstrated that brings...

We investigate systematically the competition between second harmonic generation (SHG) and two-photon-induced luminescence (TPL) that are simultaneously present in Au nanoparticles excited by using a femtosecond (fs) laser. For large-sized (length ∼ 800 nm, diameter 200 nm) nanorod, SHG appears to be much stronger than TPL. However, situation is completely reversed when nanorod fragmented into many fs In sharp contrast, only TPL observed small-sized 40 10 nanorods. When number of nanorods...

A magnetic coupling metasurface with a structure of Ag nanograting/space layer/Ag reflector is proposed to achieve broad-band and broad-angular absorption response for 2D materials such as MoS2 monolayer. By reducing the size nanograting thickness spacer into deep subwavelength, strong effects occur within metasurface. The can confine large energy density reduce metallic optical loss relatively low value in structure. Correspondingly, broadband enhancement achieved average visible wavelength...

We propose a graphene filter with tunable flat-top bandpass response. Such consists of two cascaded resonators embedded in waveguide. The evanescence coupling between cavities is crucial to realize the flat and transmission. numerically demonstrate that passband can be electrically tuned over wide wavelength range midinfrared spectrum sharper roll-off, flatter tops, better out-of-band rejection compared single resonator case. proposed device very compact its working wavelength. It might...

Fano resonances in plasmonic systems have been proved to facilitate various sensing applications the nanoscale. In this work, we propose an experimental scheme realize a single protein by utilizing its two-photon luminescence enhanced resonance system. The asymmetric gold hexamer supporting polarization-dependent and modes without in-plane rotational symmetry is used as referenced spatial coordinate for bio-sensing. We demonstrate via full-vectorial three-dimensional simulation that moving...

A novel precursor, hexakis[μ-(diethylcarbamato-O:O')]-μ4-oxotetrazinc, (Zn4O(CO2NEt2)6) (1), for the single source chemical vapor deposition (SSCVD) growth of ZnO films has been developed. The structure and chemistry resultant were characterized using photoemission spectroscopy diffraction techniques as well electron microscopy. polycrystalline are relatively dense columnar have preferred c-axis orientation. Their morphology is very similar to that RF sputtered films, but with significant...

The switching speed of magnetic fluids was investigated by using laser light different power densities as well incandescent light. It found that the exhibited a strong dependence on incident density and there existed an optimum value at which fastest operation achieved. In addition, it revealed clustering nanoparticles, became resolved large densities, resulted in rapid agglomeration nanoparticles when field applied. is suggested optical trapping force beam responsible for formation clusters.

We propose a numerical method to evaluate the two-photon-induced luminescence (TPL) of single gold nanorods (GNRs). The validity this is confirmed by cos4 α dependence TPL GNRs on polarization angle α, which in good agreement with experimental observations. As comparing their linear optical properties such as scattering and absorption, GNR found be more sensitive change surrounding environment. This property exploited detect nanoparticles (NPs) approaching from far place. By monitoring...

Hot electron photodetectors based on a planar structure of metal-insulator /semiconductor-metal (MIM/MSM) have attracted much attention due to the easy and cheap fabrication process possibility detecting light with energy lower than semiconductor band gap. For this type device, however, hot photocurrent is restricted by trade-off between absorption internal quantum efficiency (IQE) since high usually occurs within thick metals IQE in case low. The circumvented paper proposing new...

We demonstrate the switching of light in near-infrared region (1.55 microm) through manipulation magnetic nanoparticles a fluid by using another visible (0.532 microm). The formation photonic gap is found when laser or field applied. A shift to longer wavelengths observed with increasing power strength.

The dependence of the transmission behavior magnetic fluids on incident power density a laser beam is investigated and conventional Z-scan technique employed to continuously vary optical forces induced by beam. We calculate exerted nanoparticles compare them with those for gold silica nanoparticles. It found that are comparable In addition, calculation results show absorption force dominant at low densities while gradient scattering become significant high when clustering occurs....

We propose and demonstrate a method to achieve large effective Soret coefficient in colloids by suitably mixing two different particles, e.g., silica beads Fe3O4 nanoparticles. It is shown that the thermophoretic motion of nanoparticles out heating region results nonequlibrium depletion force for beads. Consequently, are driven quickly region, forming three-dimensional crystal with few defects dislocations. The binding so tight colloidal photonic can be achieved after complete evaporation...

The optomechanical interaction between a plasmonic nanocavity and gold nanorod through optical forces is demonstrated. It revealed that strong localized plasmon resonance mode hybridization induced by results in the of splitting into two different modes (bonding antibonding mode). When whole system (gold nanocavity) excited at mode, can receive an pushing force be pushed away from nanocavity. On other hand, pulling acts on trapped when tweezers work bonding mode. acting enhanced orders...

We propose a tunable all-optical plasmonic rectifier based on the nonlinear Fano resonance in metal-insulator-metal waveguide and cavities coupling system. develop theoretical model temporal coupled-mode theory to study device physics of nanoscale rectifier. further demonstrate via finite difference time domain numerical experiment that our idea can be realized system with an ultracompact size ~120×800 nm². The could facilitate signal processing nanoscale.

Electrochemical sensing is an effective method for trace determination of specific substances. However, there are many active substances in plants, and the pH environment plant organs varies. These factors directly affect performance electrochemical sensors make it difficult to realize real-time detection accurately. Here, online intelligent monitoring system indole-3-acetic acid (IAA) was proposed, including reusable microsensor, portable workstation, cloud platform. The microsensor...

We investigate the simultaneous trapping and melting of a large number gold (Au) nanorods by using single focused laser beam at 800 nm which is in resonance with longitudinal surface plasmon Au nanorods. The processes were monitored two-photon luminescence A multi-ring-shaped pattern was observed steady state process. In addition, optical clusters orbits circling focus observed. morphology structure after characterized scanning electron microscope. It revealed that selectively melted region....