In this paper; the surface plasmon resonance (SPR) sensor with a porous silica film was studied. The effect of thickness and porosity on performance analyzed. results indicated that figure merit (FOM) an SPR can be enhanced by using low-refractive-index. Particularly; FOM 40 nm thick 90% film; whose refractive index is 1.04 improved 311% when compared traditional sensor. Furthermore; it found decrease in or increase low-refractive-index enlarge enhancement. It believed proposed will helpful...

In this paper, we propose a surface plasmon resonance (SPR) sensor based on two-dimensional (2D) materials (graphene, MoS2, WS2 and WSe2) hybrid structure, theoretically investigate its sensitivity improvement in the visible region. The thickness of metal (Au, Ag or Cu) layer number each 2D material are optimized using genetic algorithms to obtain highest for specific wavelength incident light. Then, sensitivities proposed SPR sensors with different films at various wavelengths compared. An...

In this paper, the sensitivities of graphene based surface plasmon resonance (SPR) biosensors with gold (Au), silver (Ag) and copper (Cu) layers are numerically analyzed compared in visible region. As wavelength incident light increases, sensitivity a monolayer SPR biosensor specific metal (Au, Ag or Cu) layer firstly increases to maximum value (called peak sensitivity), then decreases. It is found that (300.26°/RIU) 119% 200% higher than one Au (137.02°/RIU) Cu (136.24°/RIU) layer....

In this paper, we presented a design method of surface plasmon resonance (SPR) biosensor with high performance using genetic algorithm (GA). The constraint conditions the sensitivity and reflectivity at angle were used in merit function (MF) GA to achieve simultaneous optimization resolution. By proposed method, designed an Au-Ag-TiO2-graphene based SPR first compared its traditional Au-graphene biosensor. resolution was nearly three times that one on premise same sensitivity. addition,...

This paper demonstrates further research on intelligent algorithms of binary amplitude optimization for wavefront shaping by numerical simulations. A better fitness function the genetic algorithm (GA) has been presented after a comparative analysis enhancement. With this new discriminant, we have achieved relative enhancement 0.225, which is higher than theoretical value (0.159). In addition, also proposed kind modified particle swarm (PSO), unmodified PSO and faster convergence speed GA....

Radiative cooling window has been designed to emit infrared radiation in the atmospheric transparency and reflects near-infrared light while allowing visible pass through. However, improvements are still needed transmissivity of light, reflectivity emissivity mid-infrared spectra. This paper proposes a color-preserving radiative consisting multilayer film as transparent reflector polydimethylsiloxane (PDMS) thermal emitter. design involves optimizing types materials, number layers,...

This paper proposes a smart window for radiative cooling with adjustable transparency by leveraging the phase transition property of VO 2 . The proposed exhibits daytime visible light transmission and near-infrared reflection, all-day cooling, nighttime privacy protection feature. It comprises bottom layer /Ag/VO top cubic two-dimensional SiO gratings, structural parameters optimized genetic algorithm to ensure excellent optical performance. In daytime, 75.4% transmittance 87.8% reflectance...

By adding an absentee layer on the top of metallic layer, figure merit (FOM) a surface plasmon resonance (SPR) sensor with Kretschmann configuration was enhanced, without changing angle and reflectance at angle. Comparing traditional SPR sensor, FOM composed either 1367 nm thick KCl or 235 Si3N4 can be improved by 5.53% 11.41%, respectively. The enhancement should attributed to faster decrease full width half-maximum than sensitivity after applied in sensor.

In this paper, we have experimentally demonstrated light focusing through strongly scattering media by performing binary amplitude optimization with a genetic algorithm. the experiments, control 160 000 mirrors of digital micromirror device to modulate and optimize transmission paths in media. We replace universal target-position-intensity (TPI) discriminant signal-to-background ratio (SBR) With 400 incident segments, relative enhancement value 17.5% ground glass diffuser is achieved, which...

A surface plasmon resonance (SPR) sensor with a high-order absentee layer on the top of metallic film is proposed. The performance SPR NaCl, MgO, TiO2 or AlAs analyzed theoretically. results indicate that sensitivity and full width at half maximum those sensors decrease increasing order layer, but variation figure merit (FOM) depends refractive index layer. By improving high-refractive-index, FOM can be enhanced. value for (or AlAs) 1.059% 2.587%) higher than one one-order It believed...

We present a digital micromirror device (DMD) based superpixel method for focusing light through scattering media by modulating the complex field of incident light. Firstly, we numerically and experimentally investigate sample using methods with different target fields. Then, single-point multiple-point experiments are performed this superpixel-based modulation method. In our experiment, up to 71.5% relative enhancement is realized. The use DMDbased control opens an avenue improve media.

Introducing phase transition materials to random systems provides a promising route create new optoelectronic functionalities of lasers. Here, laser with switchable lasing modes is reported, which designed thermoresponsive hydrogel as scattering medium. By manipulating the in hydrogel, can be switched reversibility between incoherent and coherent lasing. The phenomenon derives from changing light properties different states, thus affecting optical feedback path Besides, based on its...

The design of “stretcher–compressor” using aperiodic multilayers (aMLs) for attosecond pulses in the extreme ultraviolet (EUV) region is presented. We use a single-objective temporal optimization method based on genetic algorithm (GA) to maximize pulse reflection efficiency single mirror. Employing this method, we studied relationships optimal number layers, achievable energy reflectivity, and duration. then apply findings an configuration with much improved overall throughput...

We theoretically investigated detection accuracy (DA) of a surface plasmon resonance (SPR) sensor with top dielectric layer. The effects the variation thickness and material layer on DA SPR were investigated. result indicated that adding small refractive index (less than analyte) can improve traditional sensor. In addition, by comparing law electric field intensity at analyte–dielectric interface sensor, we studied physical mechanism variation. This study be helpful for high-performance development.

A comparative study of sensitivity guided-wave surface plasmon resonance (NGWSPR) biosensors with Au, Ag, Cu, and Al is presented. The thicknesses metal films in NGWSPR were optimized first to realize minimal reflectivity at angle. Then, the sensitivities by optimizing thickness dielectric film, peak for different metals are determined. By comparing metals, we find that Ag-based biosensor always exhibits largest dielectrics, followed Cu-, Au-, Al-based ones. When using PbS as biosensor, up...