Lanxin Ma

Shandong University | SDU

The presence of bubbles can significantly change the radiative properties of seawater and these changes will affect remote sensing and underwater target detection. In this work, the spectral reflectance and bidirectional reflectance characteristics of the bubble layer in the upper ocean are investigated using the Monte Carlo method. The Hall–Novari...

Due to the dependent scattering and absorption effects, the radiative transfer equation (RTE) may not be suitable for dealing with radiative transfer in dense discrete random media. This paper continues previous research on multiple and dependent scattering in densely packed discrete particle systems, and puts emphasis on the effects of particle co...

For many practical radiative transfer problems in dispersed media, the host medium surrounding the particles is absorbing rather than lossless, therefore it may lead to inaccurate results when the effect of host medium absorption on particle scattering is neglected. This paper presents a systematical investigation on the radiative transfer problems...

Dynamic color tuning has significant application prospects in the fields of color display, steganography, and information encryption. However, most methods for color switching require external stimuli, which increases the structural complexity and hinders the applicability of front-end dynamic display technology. In this study, we propose polarizat...

Conventional infrared camouflage materials are typically confined to special spectral ranges. To address challenges posed by the combination of both active and passive detection operating in different bands, a multi-band compatible camouflage material is highly required. Combining rigorous coupled-wave analysis and genetic algorithm, a 9-layer film...

Building-integrated photovoltaics (BIPVs) shows attractive potential in utilizing solar energy and easing the global greenhouse effect. However, the strong absorption of traditional silicon (Si) photovoltaic (PV) modules makes the high surface temperature and keeps the black appearance. For the current BIPVs, improving the power conversion efficien...

Among various remote sensing approaches, optical polarization remote sensing shows great advantages in identifying oil–water emulsions in seawater and has become one of the most promising detection technologies. Herein, we focus on exploring the sensitivity of polarized radiative transfer properties for oil emulsion polarization detection to the in...

Particle-dispersed coatings emerged as a promising approach to regulate the apparent radiative properties of underlying substrates in various applications, including but not limited to radiative cooling, thermal management, and infrared stealth. However, most research efforts in this field overlooked the dependent scattering mechanisms between the...

For charged nanoparticles, no relation of the near fields to the resonance conditions has yet been documented. Hence, the “singular” near fields induced by the excess charges have not yet been well explained. In this paper, using the charge-amended scattering theory, we study in detail the excess-charge-regulated resonance conditions and the blue s...

The continuous development of advanced optical devices towards high performance, miniaturization and integration has led to an increasing demand for high refractive index optical materials. Nanocomposites - made from high...

The light scattering properties of particles play important roles in radiative transfer in many dispersed systems, such as turbid atmosphere, ocean water, nanofluids, composite coatings and so on. As one of the scattering property parameters, the scattering phase functions of particles are strongly dependent on the particle size, size distribution,...

Silicon nanoparticles (SiNPs) with lowest-order Mie resonance produce non-iridescent and non-fading vivid structural colors in the visible range. However, the strong wavelength dependence of the radiation pattern and dielectric function makes it very difficult to design nanoparticle systems with the desired colors. Most existing studies focus on mo...

Organic solvents are fluids commonly used in different branches of materials science. The determination of the wavelength-dependent complex refractive index of organic solvents is essential in physical, chemical, biological, and optical applications. The existing databases for the complex refractive index of many organic solvents are insufficient a...

Noniridescent and nonfading structural colors generated from metallic and dielectric nanoparticles with extraordinary optical properties hold great promise in applications such as image display, color printing, and information security. Yet, due to the strong wavelength dependence of optical constants and the radiation pattern, it is difficult and...

The optical properties of biochemical compositions of microalgae are vital for the improvement of biosensor design, photobioreactor design, biofuel, and biophotonics techniques. A combination method using both the double optical pathlength transmission method (DOPTM) and the ellipsometry method (EM) is called DOPTM-EM, and it is used to acquire the...

Optical identification, classification and quantification of different oil slicks play important roles in oil-slick monitoring and detection. Under the actions of wind, waves and other marine forces, oil slicks on the sea surface mix with seawater to form oil-seawater emulsions. Herein, we focus on the spectral radiative properties of seawater-in-o...

This paper focuses on polarized radiative transfer in dispersed layers composed of densely packed optically soft particles while considering the effects of dependent scattering and particle agglomeration. The radiative properties of the particles for different agglomeration degrees are calculated using the Lorenz-Mie theory combined with the Percus...

Light scattering by particles immersed in an absorbing host medium has been an important issue in many fields, such as ocean optics, atmospheric radiation, remote sensing and so on. The traditional theory ignores the effect of host medium absorption on particle scattering, which may result in inaccurate results. In this paper, the scattering coeffi...

The hedgehog-like ZnO particles (HPs)and ZnO–Au composite particles (HP-Au)show great potential in the application of photocatalysis, due to their special nanostructure and unusual dispersion behavior in fluids. To improve the efficiency of photocatalysis, one needs to analyze and optimize the radiative transfer of nanofluids containing HPs and HP-...

Noble metal nanoparticle clusters show unique light absorption and catalysis properties, which have been widely used in the application of photocatalysis, optoelectronics, biomedical optics and so on. The absorption cross section of densely packed nanoparticle clusters, which can be enhanced or restricted due to the near field effects needs to be s...

Radiative cooling, as a passive cooling method, is an effective way to save energy and reduce emissions by dissipating heat into space through the "sky window," without consuming any additional energy. The actual particles in the radiative-cooling coating constitute a particle cloud with non-uniform size distribution and the cooling effect is great...

Spectral radiative transfer between particles in a semitransparent medium (i.e., water, glass, and air) needs to be considered when photo-transmission or high-temperature phenomenon is involved. However, the particle size distribution during application is generally an un-continuous change and conventional simplified treatments of particle size dis...

This study presents a detailed study on the absorption efficiency of a dimer structure composed of two Au spheres embedded in air. The absorption efficiency of each sphere is directly calculated by the superposition T-matrix method. The influences of particle size parameter, interparticle distance and polarization of incident light on the absorptio...

Available online xxx Keywords: Sea water Complex refractive index TiO 2 nanofluids Extinction coefficient Transmittance a b s t r a c t Photocatalytic decomposition of sea water is an effective way to solve the future energy crisis. However, there is a great deal of controversy about seawater's effect on photo-catalytic hydrogen production efficien...

The radiative transfer equation (RTE) has been widely used to deal with multiple scattering of light by sparsely and randomly distributed discrete particles. However, for densely packed particles, the RTE becomes questionable due to strong dependent scattering effects. This paper examines the accuracy of RTE by comparing with the exact electromagne...

In this study, transmission process of diffused and collimated beam in a 1D densely packed bed is investigated. Absorbing–scattering spherical particles with the same radius are distributed randomly in transparent and absorbing host media. The refractive indexes of the spheres are different from that of the host medium. The size parameter χ of thes...

Because of the ultra-high operation temperature in solar thermochemical reactors, radiative transfer accounts for the majority of the total heat transfer. Determining the radiative characteristics of catalysts during solar thermochemical reactions is critical for numerical calculations. Optical constant of material is only determined by the intrins...

Under wind condition, horizontally homogeneous stable layer of bubble population is generated in the upper ocean because of wave breaking. Meanwhile, the air-sea interface is rough according to wind blowing. In this paper, Monte-Carlo method is employed to study the transmission process of diffused blue-green light in the upper ocean layer. On the...

Spectral properties of sea foam greatly affect ocean color remote sensing and aerosol optical thickness retrieval from satellite observation. This paper presents a combined Mie theory and Monte Carlo method to investigate visible and near-infrared spectral reflectance and bidirectional reflectance distribution function (BRDF) of sea foam layers. A...

The presence of bubbles plays an important role on the radiative properties of medium. In this work, the apparent radiation characteristics of bubbles in absorbing medium are investigated by a generalization of the Lorenz-Mie theory. The efficiency factors of bubbles with different absorption indexes are studied. The scattering and absorption coeff...

Exposure under concentrated solar radiation increases the temperature of volumetric receiver which can cause high thermal stress and damage the receiver. The Plano-convex quartz window is introduced with the aim to minimize heat flux gradient of porous medium receiver. Thermal performance of porous medium receiver with quartz window is numerically...