Light Density Research Articles

Wafer-scale high sensitive UV photodetectors based on novel AlGaN/n-GaN/p-GaN heterostructure HEMT

We report a novel high sensitive ultraviolet (UV) photodetector based on AlGaN/n-GaN/p-GaN heterostructure high electron mobility transistor (HEMT) on sapphire substrates and have prepared four types of devices with identical lengths but different widths of the effective region on one wafer. Since the existence of the built-in electric field within p-GaN and n-GaN, the two-dimensional electron gases (2DEGs) at the AlGaN/n-GaN interface is effectively depleted, leading to ultra-low dark current at pA level. Under UV LED irradiation with wavelength of 365 nm, the photodetectors demonstrate extremely high light on/off ratio (Ilight/Idark) of about 106 and high photoresponse speed with the rise time (τrise)/decay time (τdecay) of 1.53 ms/2.21 ms at Vds = -5 V under light power density of 236.97 mW/cm2. Furthermore, the R of the photodetector reaches 9.12 A/W, the EQE and D* are as high as 3100 % and 1.95 × 1013 Jones, respectively, indicating overall high performances of the device in terms of photoresponsivity, EQE, detectivity and robust stability. The proposed photodetectors with merits of p-GaN etchless compared with conventional E-mode p-GaN HEMT and wafer-scale mass production may pave the way for the application of UV communication, Internet of Things and medical treatment.

Disordered regions of respiratory supercomplexes offer new pathways for substrate channeling in crowded membranes.

Are protein supercomplexes biological redundancies or do they have a functional role? This question has been perplexing biophysicists and bioenergeticists for decades, especially on the significances in crowded environments. Now, cryo-EM has brought forth remarkable insights into the structures of supercomplexes, but functional relevance of their intrinsically disordered regions remains a mystery. First, using a combination of maximum entropy (MaxEnT)-guided molecular simulations with low-resolution cryo-EM data, we have resolved the disordered Qcr6 subunit of respiratory complex III (CIII). Second, porting this whole-CIII model into the crowded yeast CIII2CIV2 supercomplex, long-timescale Brownian Dynamics computations were performed. We found that the negative charge on the disordered region surprisingly cooperates with that of the anionic lipids in the mitochondrial membrane to attract a pool of complementary protein substrates in its vicinity. Third, we discovered how the transient fold of Qcr6 expedites directional diffusion of the substrates from CIII to CIV that simultaneously leverage the supercomplex architecture as well as the electrostatic environment of the membrane. A re-classification of the EM images based on our computational model have brought to light new density features that indeed describe the 2-dimensional dynamic of the substrate in crowded supercomplexes. Finally, using multisequence alignment via Alphafold2, mutations are designed to control the diffusivity of substrates by tuning the disorder of the protein surface, for future biochemical validation.

Silicon carbide nano-via arrays fabricated by double-sided metal-assisted photochemical etching

Silicon carbide (SiC) has gradually dominated the market of power semiconductor electronic devices because of its excellent electrical properties and chemical stability. However, fabricating micro/nano structures in SiC that are crucial for device functioning has been challenging. In this paper, a novel double-sided metal-assisted photochemical etching (double-sided MAPCE) was proposed to efficiently fabricate SiC nano-via arrays. The experimental results demonstrated that the vertical etching rate of double-sided MAPCE was ∼ 2.2 times higher than that of traditional MAPCE. The etching rate of SiC was found to be closely related to the type of noble metal, the concentration of oxidant (H2O2) and the UV light power density. The mechanism of double-sided MAPCE was disclosed as that the bottom noble metal layer catalyzed the reduction of H2O2, therefore, a built-in electric field was created which separated the photogenerated electron-hole pairs, thus, more photogenerated holes participated in oxidation of SiC resulting in improved SiC etching rate. The proposed method is possible to be used to process wide bandgap semiconductors.

Modifying the coherence of vertical-cavity surface-emitting lasers using chaotic cavities

Vertical-cavity surface-emitting lasers (VCSELs) have been widely adopted in a variety of applications in recent years, with even more applications currently under research and development as a result of the emergence of visible-light VCSELs. Most of these applications make use of the ease of fabrication of large two-dimensional arrays of lasers, a feature unique to VCSELs that makes them scalable and versatile. However, applications that rely on the uniformity of the emitted beam in the transverse plane, such as illumination, projection, holography, and displays, suffer from the coherence artifacts (speckles) that reduce the quality of the formed images when coherent lasers are used. In this work, we show that, by using a chaotic-cavity D-shaped mesa, the coherence of broad-area VCSELs can be substantially reduced (the number of mutually incoherent modes is almost doubled, and the spectral full width at half-maximum is increased from ∼ 1.1 n m to ∼ 4.5 n m ), and the maximum achievable optical power is increased by up to 60%. The simplicity of implementing the reported design, which requires no additional fabrication steps, makes it a promising solution for applications that would benefit from the lower speckle density of the emitted light as well as those that rely on lower temporal coherence, such as time-domain optical coherence tomography and fiber-optic gyroscopes.

Urban Distribution and Evolution of the Yangtze River Economic Belt from the Perspectives of Urban Area and Night-Time Light

Research on urban development patterns and urban sprawl in the Yangtze River Economic Belt (YREB) has received wide attention. However, existing research has always made use of statistical data, which are not often available. Considering the high availability of satellite data, this study attempts to combine two satellite-acquired indexes, including urban area and night-time light, to evaluate the urban development of the YREB during 2012–2019. The methods included using growth index, rank-size law, and the Markov transition matrix, as well as constructing urban night-time light density and unbalanced index of night-time light, derived from the Gini Index. Some important patterns were revealed. Firstly, the three reaches (Upper Reaches, Middle Reaches, and Lower Reaches) in the YREB have all shown rapid growth in urban area and night-time light, and they all have increased in urban density. Secondly, from the perspective of regional disparity, the Upper Reaches have the highest growth rate of the urban area, while the Middle Reaches have the highest growth rate of night-time light; and the Upper Reaches have more urban sprawl, while the Middle Reaches have shown more compact growth. Thirdly, higher urban density is related to more balanced development across cities. Our study suggests new knowledge can be obtained by combining the two indexes for understanding urban development in the YREB.

Global transcriptome profiling reveals differential regulatory, metabolic and hormonal networks during somatic embryogenesis in Coffea arabica

BackgroundSomatic embryogenesis (SE) is one of the most promising processes for large-scale dissemination of elite varieties. However, for many plant species, optimizing SE protocols still relies on a trial and error approach. We report the first global scale transcriptome profiling performed at all developmental stages of SE in coffee to unravel the mechanisms that regulate cell fate and totipotency.ResultsRNA-seq of 48 samples (12 developmental stages × 4 biological replicates) generated 90 million high quality reads per sample, approximately 74% of which were uniquely mapped to the Arabica genome. First, the statistical analysis of transcript data clearly grouped SE developmental stages into seven important phases (Leaf, Dedifferentiation, Primary callus, Embryogenic callus, Embryogenic cell clusters, Redifferentiation and Embryo) enabling the identification of six key developmental phase switches, which are strategic for the overall biological efficiency of embryo regeneration. Differential gene expression and functional analysis showed that genes encoding transcription factors, stress-related genes, metabolism-related genes and hormone signaling-related genes were significantly enriched. Second, the standard environmental drivers used to control SE, i.e. light, growth regulators and cell density, were clearly perceived at the molecular level at different developmental stages. Third, expression profiles of auxin-related genes, transcription factor-related genes and secondary metabolism-related genes were analyzed during SE. Gene co-expression networks were also inferred. Auxin-related genes were upregulated during dedifferentiation and redifferentiation while transcription factor-related genes were switched on from the embryogenic callus and onward. Secondary metabolism-related genes were switched off during dedifferentiation and switched back on at the onset of redifferentiation. Secondary metabolites and endogenous IAA content were tightly linked with their respective gene expression. Lastly, comparing Arabica embryogenic and non-embryogenic cell transcriptomes enabled the identification of biological processes involved in the acquisition of embryogenic capacity.ConclusionsThe present analysis showed that transcript fingerprints are discriminating signatures of cell fate and are under the direct influence of environmental drivers. A total of 23 molecular candidates were successfully identified overall the 12 developmental stages and can be tested in many plant species to optimize SE protocols in a rational way.

Photon flow: A three-dimensional expression of the light field using volume photon mapping

This paper proposes a new method to depict the light field based on the volume photon mapping algorithm. In the context of the light field simulation, a participating medium serves to deposit the photons, but does not disturb their propagation. The photons are therefore neither scattered nor absorbed in order to preserve their energy and trajectory within the environment, thus providing an unbiased luminance distribution. A visualisation of the photon distribution enables an intuitive interpretation of the light propagation that helps designers to understand the basic light field in the space. In addition to visualisation, the magnitude of the simulated physical light field can be numerically evaluated from the volume photon map distribution using, for example, cubic and scalar illuminance. This can further inform the designer on the light density distribution in the space, since the latter directly correlates with the density of the photons, and therefore the scalar illuminance. The accuracy of the proposed method was ascertained by comparing it with the original RADIANCE. Furthermore, its advantage in visualisation was demonstrated using a complex case study involving strong indirect lighting, reinforced by a comparison of the simulation and measurement in the actual space. In addition, photon mapping was found to evaluate illuminance in multiple grid points much faster than RADIANCE Classic, notably due to the complex ambient lighting from specular reflections. The implementation of the specialised volume photon mapping software is now part of the RADIANCE software and is available as a lighting research tool for the community.

Incorporating formamidinium into 4-fluoro-phenethylammonium based quasi-2D perovskite films and their application in n-i-p perovskite solar cells

Recently, perovskite solar cells (PSCs) basing on quasi-two-dimensional (quasi-2D) perovskites with hydrophobic bulky organic cations have received a lot of interests owing to their superior moisture stability. While quasi-2D perovskites have achieved great success in planar p-i-n PSCs, their application in planar n-i-p devices and the corresponding efficiencies lag far behind. In our work, (FPEA)2(MA)4Pb5I16 perovskite films with high crystallinity, compact and smooth surface were deposited on electron transport layer with NH4SCN as an additive. Formamidinium (FA+) were then incorporated into the FPEA based perovskite films to partially replace methylammonium (MA+), and effects of FA+ on the film's vertical orientation, light absorption capacity, carrier lifetime, defect density and electron mobility were studied. It was found that when molar ratio of FA/MA = 0.5/9.5, the film had the highest vertical orientation, enhanced light absorption, less carrier recombination loss. The obtained (FPEA)2(FA0.05MA0.95)4Pb5I16 based n-i-p PSCs gave a maximum efficiency of 12.17% under standard illumination, retaining 83% of the initial efficiency after stored in air environment (25–30 °C) with 40 ± 5% RH for 1080 h. The results demonstrate an efficient approach to prepare high-quality quasi-2D perovskite films in a n-i-p structure as well as improved device efficiency and stability.

Optimizing Medium Composition and Environmental Culture Condition Enhances Antioxidant Enzymes, Recovers Gypsophila paniculata L. Hyperhydric Shoots and Improves Rooting In Vitro

Gypsophila paniculata L. is one of the most important commercial cut flowers worldwide. The plant is sterile and propagated mainly by in vitro culture techniques. However, hyperhydricity hinders its micropropagation and increases mortality during ex vitro acclimatization. Hyperhydric shoots of G. paniculata were proliferated from nodal explants on MS medium without growth regulators that contained 30 g L-1 sucrose, and gelled with 6.0 g L-1 agar. Medium components and environmental culture conditions were optimized to revert hyperhydricity in G. paniculata microshoots and develop an efficient micropropagation protocol for commercial production. Multiple shoots with high quality were successfully regenerated on MS medium fortified with potassium and ammonium nitrate at full concentration, 2.0 mg L-1 paclobutrazol, solidified with 9.0 g L-1agar in Magenta boxes of 62.87 gas exchange/day and incubated under light density of 60 µmol m-2s-1. We recorded 4.33 shoots, 40.00 leaves, 6.33 cm, 2.50 g and 95.00% for number of shoots/explant, number of leaves/shoot, shoot length, shoot fresh weight and normal shoots percentage, respectively. Well-rooted plantlets of G. paniculata were developed from the reverted microshoots, with the rooting percentage (95.00%) on MS medium augmented with 1.0 mg L-1 IBA in Magenta boxes of 62.87 gas exchange/day and 60 µmol m-2s-1 light density. In vitro-rooted plantlets exhibited reduced electrolyte leakage, and enhanced antioxidant enzymes activity of peroxidase, catalase, and polyphenol oxidase due to good ventilation at the highest gas exchange rate of the culture vessels.

High-performance hybrid graphene-perovskite photodetector based on organic nano carbon source-induced graphene interdigital electrode film on quartz substrate

Hybrid graphene interdigital electrode-perovskite structure has demonstrated high value in the photodetector (PD) due to high absorbance and carrier collection efficiency. However, direct pattern of graphene film on the dielectric substance still faces huge challenges. Especially, the involvement of multi-step transfer and high-energy etching process hamper its development.In this context, we propose an organic nano carbon source (ONCS). Direct pattern of graphene film on the quartz substrate (GFqtz) is attained by the calcination of patterned ONCS film for the first time, which is simply achieved by screen printing technology thanks to the gel state. The transformation mechanism from ONCS to GFqtz has been proposed. In detail, the ONCS in-situ react with the quartz substrate to induce the SiC nanocrystals layer during the calcination. Then, the graphene film composes of the non-ordered graphene crystal layer and the aligned graphene crystals layer. Finally, the perovskite PD are successfully constructed by the GFqtz interdigital electrode. Compared to the PD fabricated by the Au interdigital electrode, the GFqtz-perovskite PD present an ultra-low detective light power density (0.5 μW/cm2) at 1 V bias voltage. The maximum responsivity and defectivity (0.1 A/W) and D* (2.6 × 1011 Jones) of the GFqtz-perovskite PD demonstrate an order of magnitude higher than the Au-perovskite PD's value.

Porous Carbon Sponge from White-Rot Fungus Phanerochaete chrysosporium for the Removal of Oils and Organic Solvents.

Oil leakage incidentally occurs and leads to environmental disasters. Because of their porous and hydrophobic characteristics, graphene sponges are often studied as an oil adsorbent to repair oil spills at sea. Graphene materials are very expensive, and their biological toxicity has been given serious concerns; however, the easier preparation and eco-friendly, biomass-derived porous carbon materials can be used as an alternative to graphene materials. In this study, we prepared a porous carbon sponge (PCS) for oil and organic solvent removal by carbonizing white-rot fungus Phanerochaete chrysosporium, a fast-growing microorganism for the production of lignin-degrading enzymes and the environmental remediation. P. chrysosporium fungus balls were converted into black PCS by carbonization at high temperatures, where PCS was light (density of 56 g/L), hydrophobic (contact angle of 115°) and porous. According to the results of BET and XPS analysis, the surface area of PCS was 14.43 m2/g, and the carbon in PCS is mainly sp2 carbon. PCS could adsorb pure oils and organic solvents within seconds. The adsorption capacities of PCS were 20.7 g/g for gasoline, 30.1 g/g for peanut oil, 27.7 g/g for toluene, 18.5 g/g for dodecane, 32.5 g/g for chloroform, 27.1 g/g for tetrahydrofuran, 23.7 g/g for acetone and 13.7 g/g for ethanol. According to the reusability study, there was no obvious capacity loss after recycling up to 10 cycles. Our results indicated that white-rot fungi could be adopted as a cheap carbon resource for oil and organic solvent removal.

Photovoltaic Properties of the Titanium Dioxide Compact Layer and Reduced Graphene Oxide for Dye-Sensitized Solar Cells Under Different Light Intensities

Dye-sensitized solar cells (DSSCs) demonstrate excellent performance under low-light conditions. In this current study, an investigation into the DSSCs photovoltaic performance under different light densities was conducted. The photoanode was made with spin coating and doctor blade methods. The photovoltaic efficiency increased when the titanium tetrachloride (TiCl <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> ) treatment and reduced graphene oxide (rGO) were introduced into the photoanode. The photoanode pretreatment and posttreatment of the TiCl <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> process could effectively inhibit the recombination of the photogenerated electrons with the oxidized redox ions. The rGO could enhance the electron transport and so decrease the dark reaction. The photoelectric conversion efficiency (PCE) increased from 4.74% to 6.28% under 100 mW/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . The device achieved the optimal PCE at 10 mW/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> of 8.78%.

Memristors based on NdNiO3 nanocrystals film as sensory neurons for neuromorphic computing.

By mimicking the behavior of the human brain, artificial neural systems offer the possibility to further improve computing efficiency and solve the von Neumann bottleneck. In particular, neural systems with perceptual capability expand the application field and lay a good foundation for the construction of perceptual storage and computational systems. However, research on neurons with perceptual functions is still relatively scarce, with most works focusing on optoelectronic synapses. The neuron is important for neuromorphic computing systems because neurons output excitatory or inhibitory stimuli to regulate the weight of synapses. Therefore, the construction of sensory neurons is crucial to expand the application range of brain-like neural computing. Here, an artificial sensory neuron is proposed, which is constructed using a photosensitive bipolar threshold switching memristor based on NdNiO3 (NNO) nanocrystals. These metallic phase nanocrystals can not only enhance the local electric field, but also act as a reservoir for defects (VoS) to guide the growth of conductive filaments and stabilize the performance of the device. They present stable bipolar threshold switching behavior with a low 120 nW set power, and the operating voltages decreased in light due to photocarrier action. A leaky integrate firing (LIF) neuron has been realized, which achieved key biological neuron functions, such as all-or-nothing spiking, threshold-driven firing, refractory period, and spiking frequency modulation. The LIF neurons receiving optical inputs have the properties of an artificial sensory neuron. It could regulate the spiking output frequency at different light densities, which could be used for a ship approaching a port. This work provides a promising hardware implementation towards constructing high-performance artificial intelligence to assist ships at night in a sensory system.

Unique excitation power density and pulse width-dependent multicolor upconversion emissions of Y2Mo4O15:Yb3+,Ho3+ for anti-counterfeiting and information encryption applications

A unique smart upconversion material Y2Mo4O15:40%Yb3+,2%Ho3+ that can respond to the power density and pulse width of the excitation light is developed.

Foamed Lightweight Soil Material for Solving Bridge Bumping on Soft Soil Foundations

Bridge bumping is a key generic technological problem in bridge constructions. Weak foundation and additional stress are caused by filling materials and rigid-flexible mutation. Traditionally, complex reinforcements for soft soil foundations are adopted with little efficiency. As a new type of lightweight man-made soil, foamed lightweight soil with a light bulk density and adjustable unconfined compressive strength can effectively solve this problem. A typical design method of bridge head with foamed lightweight soil is presented and discussed in this study. The main mechanisms of foamed lightweight soil in mitigating the influence of different stiffness of abutment and soft soil are analyzed accordingly.

Study on preparation and performance of advanced aerogel foamed concrete with ultra-light aerogel

Aerogel foamed concrete has been acknowledged as one of the most promising energy efficient building materials with high thermal insulation performance and low density in applications of green buildings and nearly zero energy buildings. However, the practical economy of aerogel foamed concrete is still relatively poor because of the greater amount of high-price ultra-insulating aerogel additive needed in the foamed concrete. Therefore, based on the premise of maintaining the high thermal insulation performance and low density of foamed concrete, reducing the amount of aerogel additive has become a key issue to improve the economy and promote the application of high-performance aerogel foamed concrete. This study proposed an equal volume replacement method based on using an ultra-light SiO2 aerogel instead of conventional SiO2 aerogel to reduce the amount of aerogel additive in foamed concrete while maintaining a high thermal insulation performance and low density. Two kinds of aerogel foamed concrete were prepared by filling light density (170 kg/m3) and ultra-light density (75 kg/m3) adiabatic aerogel powder into foamed concrete. An experiment was conducted to study the influence of different aerogel densities on the thermal conductivity, compressive strength and density of foamed concrete. The research results indicate that the density and thermal conductivity can be effectively reduced by filling ultra-light aerogel powder compared with traditional aerogel foamed concrete with an acceptable compressive strength. The results also show that the mass dosage of aerogel can be significantly reduced by using ultra-light aerogel powder. Specifically, for a foam volume ratio of 70 % and aerogel volume ratio of 13 %, the density and thermal conductivity of the ultra-light aerogel foamed concrete were reduced by approximately 10 %, which resulted in a cost reduction of 49 %. By applying the ultra-light aerogel foamed concrete in the construction of an exterior wall of a building, the heat loss through the wall can be reduced by 9 %. This study provides a significant reference for the preparation of high-performance foamed concrete and accelerates the application of super adiabatic aerogels in the building energy conservation industry.

Exfoliation characteristics of Swat vermiculite clay and its application in the preparation of lightweight composite panels

Vermiculite is a natural clay that has significant exfoliation characteristics. The exfoliated vermiculite has much lighter density and water retaining properties that makes it suitable for lightweight construction, insulation, and horticulture applications. In the present study, vermiculite ore of Swat region, Pakistan was subjected to exfoliation in a rotary kiln. The exfoliated vermiculite was characterized in detail for physical, morphological, and mineralogical properties, before and after exfoliation. The optimum temperature where lowest density was observed for various size fractions of exfoliated vermiculite was 750 °C. Vermiculite, hydrobiotite and mica were found to be the major mineral phases in the raw and exfoliated vermiculite. The exfoliated vermiculite was then blended with unsaturated polyester resin in the resin: vermiculite ratios of 65:35, 60:40, 55:45, and 50:50, to produce lightweight exfoliated vermiculite composite samples. Analysis of physical and mechanical properties of the composite samples like density, water absorption, compressive strength, tensile strength, and thermal conductivity showed that a suitable resin: vermiculite ratio of lightweight exfoliated vermiculite composite panel may be selected for a particular application.

Infrared and Near-Infrared Spectrometry of Anatase and Rutile Particles Bandgap Excited in Liquid.

Chemical conversion of materials is completed in milliseconds or seconds by assembling atoms over semiconductor photocatalysts. Bandgap-excited electrons and holes reactive on this time scale are key to efficient atom assembly to yield the desired products. In this study, attenuated total reflection of infrared and near-infrared light was applied to characterize and quantify the electronic absorption of TiO2 photocatalysts excited in liquid. Nanoparticles of rutile or anatase were placed on a diamond prism, covered with liquid, and irradiated by steady UV light through the prism. Electrons excited in rutile particles (JRC-TIO-6) formed small polarons characterized by a symmetric absorption band spread over 10000-700 cm-1 with a maximum at 6000 cm-1. Electrons in anatase particles (JRC-TIO-7) created large polarons and produced an asymmetric absorption band that gradually strengthened at wavenumbers below 5000 cm-1 and sharply weakened at 1000 cm-1. The absorption spectrum of large electron polarons in TIO-7 was compared with the absorption reported in a Sr-doped NaTaO3 photocatalyst, and it was suggested that excited electrons were accommodated as large polarons in NaTaO3 photocatalysts efficient for artificial photosynthesis. UV-light power dependence of the absorption bands was observed in N2-exposed decane liquid to deduce electron-hole recombination kinetics. With light power density P > 200 W m-2 (TIO-6) and 2000 W m-2 (TIO-7), the polaron absorptions were enhanced with absorbance being proportional to P1/2. The observed 1/2-order power law suggested recombination of multiple electrons and holes randomly moving in each particle. Upon excitation with smaller P, the power-law order increased to unity. The unity-order power law was interpreted with recombination of an electron and a hole that were excited by the same photon. In addition, an average lifetime of 1 ms was estimated with electron polarons in TIO-6 when weakly excited at P = 20 W m-2 to simulate solar-light irradiation.

Spatial densities of the photon on the light front

The light front densities of momentum, angular momentum, and intrinsic pressure are calculated for the photon, both in the free case and at leading order in quantum electrodynamics. In the latter case, we moreover decompose the form factors into photon and electron contributions. Circularly and linearly polarized photons are both considered, with the latter containing significant azimuthal modulations in both the momentum density and in intrinsic stresses. We find that the $D$-term of the photon is positive instead of negative, and accordingly the intrinsic radial pressure of the photon is negative. Despite this, the radiation pressure exerted by the photon is positive. We illustrate through explicit calculation how the intrinsic pressure associated with the $D$-term and the radiation pressure exerted by the photon are different quantities.

Investigation of the properties of translucent concrete

Translucent concrete is an alternative material for many building structures. Having a sufficiently high strength, it has minimal values of density, porosity and water resistance, which allows it to be used in the construction of light road surfaces. Modern technologies make it possible to improve the quality of the material and obtain inexpensive concrete with a high ability to transmit light. Promising developments are designed to improve the technical characteristics of concrete and minimize the cost of obtaining it. The aim of the work was to study concrete using affordable and relatively inexpensive plexiglass. Within the framework of the work, a method of light transmission at different angles is proposed and concrete trends are revealed depending on the content of transparent elements. The stages of obtaining samples with specified parameters are determined and the structure of their light tests is developed. The levels at which the main changes occur are shown. Based on the conducted research, the properties of concrete were identified and analyzed. The dependence between the volume distribution and the contribution of plexiglass components to the overall light effect is established. The characteristic parameters of light permeability, density and strength are determined. The practical benefit of the study lies in the fact that it takes into account the need to change the angles of light transmission in accordance with the requirements of architecture and determines the influence of plexiglass on the properties of samples. Thanks to the inclusion of a cheap transparent polymer in the composition of concrete, performance indicators were significantly increased and a material with a lower volume mass was obtained. Such concrete, subject to the correct manufacturing technology, has the prospect of mass use in construction.