Everything considered, we set the total number of repeating layers as high as 6. In the region of x=1.039–1.165, the increase in x is compensated by the increasing formation of Hf vacancies, while the rock salt structure remains. These results suggest that the Ag-doped HfN film not only has a high infrared reflectivity similar to Al but also has a much higher durability than Al. Infrared-reflective coatings can be formulated with various pigments, metals (such as aluminum) or other materials to produce an IR-reflective barrier. From Figure 1b, the hardness of a TMR (14–30 GPa) is much higher than that of the reflective metals Al, Ag and Au (~0.5 GPa), but their reflectivity (40–80%) is far below that of these metals (90–98%). Hu CQ, Gu ZQ, Wang JB, Zhang K, Zhang XB et al. This work opens up new opportunities for highly durable infrared-reflective coatings and rejuvenates the study of transition metal compounds in a completely new area of optics. Three different design approaches have been used, namely single layer of metal, sandwich structure and multilayer design. (a) Band structures of Ag-doped HfN film and HfN obtained by first-principles calculations. Coatings chemists and paint formulators face the challenge of developing products that are not only durable and aesthetically pleasing, but that address sustainability issues and have added functionality. Duan GF, Zhao GL, Wu L, Lin XX, Han GR . According to the principle of optical interference, the more repeating layers there are (i.e., the higher the value of z), the better the reflectivity enhancement is. This fact means the multilayered film is 7500 times more corrosion resistant than Al in this salt solution. Our highly abrasion-resistant, anti-reflective (AR) coatings include several types of HC coatings which provide maximum durability, energy transmission & minimal reflection. These findings are consistent with the selected area electron diffraction (Figure 4e), indicating the formation of a HfN(Ag) solid solution upon the doping of the Ag. Oliver WC, Pharr GM . The two validation experiments on HfN prove that our new strategy and approaches work as expected. With a high concentration of free electrons, the alloys and nanocomposites are expected to have high reflectivities over the whole infrared range. The coatings im… Precision’s REFLECT 3000 and REFLECT 5000 provides architects, specifiers, and contractors a solution for field applied infra-red reflective coatings that can be used to improve the energy efficiency of existing metal roof systems, without the cost of replacing existing roof systems. Kresse G, Furthmüller J . Antireflective coating is used to increase throughput of transmitted light of a component thus increasing the overall performance of the instrument. The traditional route also results in processing complexity because it usually involves the preparations of a variety of films to meet the multiple needs of high reflectivity, high durability and good adhesion8, 10. The ideal durable infrared-reflective coatings require not only high reflectivity in a particular infrared band but also durability to resist scratches and corrosion damage from long-term environmental exposure in environments with dust, windblown sand, moisture, acid rain and salt fog8, 9. However, increasing the number of repeating layers increases the deposition time and the processing difficulty. Chemistry is mobilizing for the future: smart and BASF jointly developed the concept car smart forvision. Rogalski A, Chrzanowski K . Ellipsometric and optical reflectivity studies of reactively sputtered NbN thin films. This research opens up whole new areas in developing durable infrared-reflective coatings. J Phys Chem C 2014; 118: 20511–20520. 67, TiO2-doped SiO2 (180–200 nm) Ref. Phys Rev B 2014; 90: 144107. Experimental and numerical study on structural and thermal radiation properties of yttrium oxide sputtered on sapphire. ZEFFLE IR reflective paint is a combination of an extremely durable fluorinated resin and IR reflective pigments. A wide variety of infrared reflective coating options are available to you, such as usage, main raw material, and state. Fu YQ, Zhu XD, Tang B, Hu XF, He JW et al. Phys Rev Lett 2003; 91: 015502. and JavaScript. Therefore, to achieve a high durability and a high reflectivity, the ideal candidate should contain strong covalent bonds and a high concentration of free electrons. AR coating options AR coatings for sapphire include BBAR for 3 to 5 μm. Moreover, the Ag-doped HfN films have much higher durabilities and stabilities. The invention further relates to an infrared reflective multilayer coating film prepared from the coating composition. Fryauf DM, Phillips AC, Kobayashi NP Corrosion Protection of Silver-Based Telescope Mirrors using Evaporated Anti-Oxidation Overlayers and Aluminum Oxide Films by Atomic Layer Deposition Proceedings of SPIE 9924, Low-Dimensional Materials and Devices 2016. Ali L, Rahaman Z . All coatings have a NIR solar reflectance above 0.6 and an IR emittance of 0.68 or higher. Chaoquan Hu or Sam Zhang or Xiaofeng Fan or Weitao Zheng. AccuCoat offers standard AR (anti-reflective) coatings on IR (infra-red) substrates to all of our customers. Understanding the electron localization process, we explore the effect of electron localization on the optical properties of the films. We recommend transition metal compounds, TMR (TM=Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W; R=B, C, N), as the durable base material and then improve its reflectivity to achieve the integration of high durability and reflectivity. It is typically used for optical applications where the coating is applied to the front of an interface between air and a lens, glass barrier, or mirror. J Eur Opt Soc 2012; 7: 12052. Mishra SK, Kumar V, Tiwari SK, Mishra T, Angula G et al. According to n1d1=n2d2=λ0/4, when λ0=1900 nm, the thickness of the two layers are d1=228 nm and d2=177 nm. During the deposition, the content of Ag was controlled by changing the RF power applied to the Ag target from 0 to 100 W, while the DC power applied to the Hf target was kept constant at 150 W. Other preparation parameters were kept constant as follows. These extra electrons induce the charge polarization near N atoms (Figure 5b). This means that a multilayered HfN film has better reflective properties than an Ag-doped HfN film at a target wavelength or in a narrow band, which is very useful for many important optical applications (e.g., pointing and tracking optical systems3). Phys Rev B 1992; 46: 6671–6687. Metrol Meas Syst 2014; 21: 565–618. Whether for bar-code scanners in an industrial setting, autonomous vehicles in the desert, or for elevated temperature sensors used indoors and out, coatings must be consistent, able to withstand environmental challenges and resist abrasion. Additionally, the introduction of Ag causes an increase in the hardness of the HfN film from 22.6 to 25.4 GPa, or >50 times the hardness of an Al film (0.5 GPa) due to the solid–solution strengthening effect (Figure 4b). The electrical resistivity sharply increases 30 times from 1.51 × 103 to 4.50 × 104 μΩcm. Used in a wide range of high-efficiency broadband, narrowband and dual-band anti-reflective optical coatings, our IR coatings for these specific substrates have been created for fast-growing tech and developing military applications. S3f) and the core-level spectra (Supplementary Fig. You are using a browser version with limited support for CSS. Bragg-mirror-like circular dichroism in bio-inspired quadruple-gyroid 4srs nanostructures. Design and fabrication of SiO2 coated Al thin films with high performance for solar front reflectors. Tsetseris L, Kalfagiannis N, Logothetidis S, Pantelides ST . Optical constants and Drude analysis of sputtered zirconium nitride films. Therefore, taking the cost of the raw materials into account, the Ag-doped HfN film is more expensive than the Al/SiO2 film. (a and b) Design of multilayers consisting of hafnium-nitride-only films: OM (Step 1)/LT (Step 2)/HT (Step 3)/LT (Step 4)/HT/LT/HT. Structural, anisotropic elastic and thermal properties of MB (M=Ti, Zr and Hf) monoborides. Gueddaoui H, Maabed S, Schmerber G, Guemmaz M, Parlebas JC . Detailed modeling process can be seen in Supplementary Sections 3,4 and 10. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. Now, researchers from China led by Chaoquan Hu from Jilin University have taken a ‘first durability then reflectivity’ approach and make an infrared coating that is significantly more durable than current coatings. The fundamental challenge in designing durable infrared-reflective coatings is achieving the ideal combination of both high reflectivity and durability. Traditionally, after the high infrared-reflective metal films such as Al, Ag and Au are deposited (step 1) (Figure 1a), transparent, hard metal oxide layers, such as SiO2 and Al2O326, 27, are deposited on top (step 2) for protection, as these reflective metal films cannot withstand corrosion, scratches and other environmental damage. REFLECT 3000 keeps metal surfaces cooler. The new strategy emphasizes ‘first durability and then reflectivity’, that is, finding a material first that satisfies the durability requirement and then modifying it to obtain a satisfactory reflectivity. Solar reflective and thermally emissive surfaces offer a sustainable way to cool objects under sunlight. These results demonstrate that the electron localization in HfNx films experiences two stages as x increases: x=1.039–1.165, electrons are ‘gradually’ localized; x=1.195–1.334, a small increase in x causes a large number of electrons to be localized, resulting in the films losing their metallic characteristic and ‘rapidly’ transform into semiconductors. Atoms, molecules, solids, and surfaces: applications of the generalized gradient approximation for exchange and correlation. Light Sci Appl 2017; 6: e16190. Even fillers, which are usually added to the paint, can potentially reduce the resulting reflectance in the near infrared. Pedrotti LS Basic physical optics. THE ULTIMATE COATINGS COMPANY's premium quality, albedo reflective paints and coatings are true IR (InfraRed) Reflective = Solar Heat-Reflective) with no ceramics, that are designed one and all to cool down the entire building envelope, both walls and roofs . Properties and structure of Ag-doped HfN films. A high concentration of free electrons in a material induces a large plasma energy (Equation (1)), which in turn affects the dielectric function (Equation (2)). This new generation of IR imagers can have 10 or more From the DOS (Figure 5c), the concentration of the conductive electrons (from the contribution of the DOS near the Fermi level) does not have an obvious change. An electrochemical workstation (CHI660E) was used to perform the corrosion measurements, which was connected to a three-electrode electrochemical reactor. Based on this principle, we incorporate gold or silver into a TMR film and explore the relationship among the composition, structure, reflectivity and durability. By controlling the optical thickness nd of the LT and HT layers, we achieve an infrared reflectivity higher than that of Al at a targeted wavelength λ0. Sci Rep 2015; 5: 9888. Continual climate change necessitates a movement toward energy savings via coatings. Used in a wide range of high-efficiency broadband, narrowband and dual-band anti-reflective optical coatings, our IR coatings for these specific substrates have been created for fast-growing tech and developing military applications. We have developed an AR coating that is centered in the infrared … Furthermore, the corrosion behavior of the films in a seawater environment was evaluated using salt-bath experiments. Structure, electrical and optical properties of TiNx films by atmospheric pressure chemical vapor deposition. We investigate the effect of the Ag content (CAg) on the structure and reflectivity. Hard amorphous nanocomposite coatings with oxidation resistance above 1000 °C. Jacobson MR, Kneale RC, Gillett FC, Raybould K, Filhaber J et alDevelopment of Silver Coating Options for the Gemini 8-m Telescopes Project Proceedings of SPIE 3352, Advanced Technology Optical/IR Telescopes VI. Abadias G, Ivashchenko VI, Belliard L, Djemia P . Article  Fedel M, Zanella C, Rossi S, Deflorian F . REFLECT 5000 is an infra-red reflective polysiloxane coating system used on metal roofs, siding, curtain walls, handrails, benches, and playground equipment to reduce the temperature of the exterior metal surfaces. Kresse G, Furthmüller J . Sani E, Mercatelli L, Sansoni P, Silvestroni L, Sciti D . Nat Mater 2003; 2: 185–189. The more solar energy an object absorbs, the greater the heat build-up. Mater Lett 1999; 40: 192–197. Optical and structural properties of SiOx and SiNx materials. By substituting any other transition metal for Hf and/or replacing N with B and C, a two-dimensional study can be mapped out. Optical coatings for infrared materials have evolved over time with the availability of advanced technologies, automation, and processes using plasma-enhanced chemical vapor deposition, ion assist deposition with electron beam sputtering and resistance sources. Thus we believe that the cost of the two mirror coatings is very similar. Making coatings that reflect infrared light and are resistant to damage from scratching and corrosion has proved very challenging. Metal roof manufacturers have been providing infra-red reflective metal roof systems to reduce heat absorption and save energy for twenty years. It works by targeting the invisible infrared portion of the sun’s radiation which means coated surfaces stay cooler and last longer than a coating that absorbs it. Reflective coatings reflect the infrared incident radiation on a surface, reduce the radiation absorbed by the building surfaces and therefore decrease the cooling energy consumptions during summer. Both glass temperatures and receiver losses can be reduced. J Mater Res 1992; 7: 1564–1583. In a 0.5 mol l−1 H2SO4 electrolyte solution, the corrosion current density of a pure HfN film is 1.81 × 10−5 A cm−2, whereas that of the doped film decreases to 1.14 × 10−5 A cm−2, only 2.4‰ of that of the pure Al film (4.69 × 10−3 A cm−2) (Supplementary Fig. Precision Coatings primers and finish coats provide outstanding beauty and performance. The infrared reflectivity and hardness of these samples (Figure 6, Table 1) are consistent with the previous experimental results9, 67, demonstrating the reliability of our experiments. To achieve maximum reflection of solar radiation a NIR-reflective pigmentation is required, that provides a high TSR value and the highest outdoor durability. However, the Ag-doped HfN film only needs to deposit a one-layer film, which is easier than the two-step preparation of the two-layer Al/SiO2 film. Lasnier CJ, McLean AG, Gattuso A, O’Neill R, Smiley M et al. Furthermore, the inherent properties of each TMR can be improved by modulating its structure (multilayering, alloying, nanocompositing, etc. The present calculations were performed by the method of projector augmented-wave pseudopotentials with density functional theory coded in the Vienna ab inito simulation package31, 32. Adv Mater 2006; 18: 2933–2948. Fig. 2. For the sake of simplicity, we refer to this structure as a ‘multilayered film’. Self-assembly of noble metal monolayers on transition metal carbide nanoparticle catalysts. The measured interplanar spacings agree well with the (111) and (200) plane spacings of the rock salt phase. Thin Solid Films 2016; 616: 122–125. The traditional mirror coating (e.g., Al/SiO2 films) is more suitable for moderate environments, while our mirror coating that was obtained by the new strategy (e.g., an Ag-doped hafnium nitride film) is more suitable for harsh environments, such as ones with dust, windblown sand, moisture, acid rain or salt fog. HfN is only 1 of the 27 TMR transition metal compounds; thus this study can be considered one point in the whole spectrum of possibilities, that is, zero dimension. (2020), Journal of Materials Chemistry C Infracote paint uses technology to reflect the sun’s radiation away from the roof surface. Replacing the reflectors costs extremely large amounts of time and money9. We prepared Al/SiO2 films by sputtering Al and then SiO2 target in the discharge gas of Ar. Previous studies66 have shown that the reflectivity of HfN films in the visible-infrared band depends on both the intraband transition that is related to the free electrons (described by a Drude part) and the interband transition that is related to the bound electrons (described by a Lorentz part). Phys Rev B 1996; 54: 11169–11186. One key area of the spectrum is the infrared (IR), specifically the near infrared. The presence of unbound d-orbital free electrons causes TMRs to have similar electrical properties and infrared reflectivity characteristics to pure metals57, causing them to be widely used in the fields of superconducting materials58, 59 and optoelectronics60, 61. Alling B, Högberg H, Armiento R, Rosén J, Hultman L . Welcome to the home of ITO Coatings, Your Leading Supplier of Special Optical Coatings, Beam Splitters, Anti-Reflective Coatings & ITO Coated Products. Precision Coatings manufactures coatings to meet application and performance requirements. For the multilayers with λ0=4 100 nm, n1=2.17, d1=472 nm and n2=2.78, d2=369 nm. Welcome to the home of ITO Coatings, Your Leading Supplier of Special Optical Coatings, Beam Splitters, Anti-Reflective Coatings & ITO Coated Products. Compared with the conventional multilayer stacking of a variety of materials, our approach involves only one material (HfNx) with switching of the optical states achieved by changing the stoichiometry x (i.e., via the partial pressure of nitrogen only), thus greatly simplifying the manufacturing process. Veszelei M, Andersson K, Ribbing CG, Järrendahl K, Arwin H . This explains why TMRs were basically excluded from the ‘radar screen’ in the search for infrared-reflective coatings. Here, we present a paintable bilayer coating that simultaneously achieves color and radiative cooling. Properly designed triple-glazed IGUs with low emissivity coatings on surfaces #2 and #4 and filled with argon gas in the cavities result in IG units with R-values as high as R-5. Humidity-gated, temperature-responsive photonic infrared reflective broadband coatings†. Bellingham: SPIE; 2008, pp127–pp138. Abadias G, Kanoun MB, Goumri-Said S, Koutsokeras L, Dub SN et al. By using the transition metal compound hafnium nitride as a base, the researchers improved its reflectivity by incorporating silver and gold to form an alloy, producing a coating that is as reflective as aluminum but significantly harder and more resistance to salt and acid corrosion, and could be used in applications that are exposed to harsh environments, such as large infrared telescopes and night-vision systems. S6), indicating that the corrosion resistance of the multilayered film in a seawater environment is easily 3000 times that of Al. These results demonstrate that the HfNx-based multilayer film possesses a much higher scratch and corrosion resistances than pure Al. J Phys Chem B 2007; 111: 2800–2805. S9 in Supplementary Section 11). Infrared Coatings. (a) The reflectance spectra of the Ag-doped HfN films before/after immersion in a NaCl solution at 35 °C for 10 days. Coatings for use with high-power ultraviolet (UV) lasers are made of different materials from those for use in the visible and near-infrared (IR). To compare our mirror coating with traditional ones, we deposit SiO2 films (approximately 200 nm) on Al films using magnetron sputtering. We are committed to assisting customers and potential customers in supplying color samples for projects. Effects of geometry and composition on charge-induced plasmonic shifts in gold nanoparticles. However, the hardness decreases significantly when more Ag is incorporated. Friedrich A, Winkler B, Juarez-Arellano EA, Bayarjargal L . Mater Sci Eng A 1999; 265: 224–232. 51572104), the National Major Project for Research on Scientific Instruments of China (2012YQ24026404) and the Program for JLU Science and Technology Innovative Research Team for financial support. A durable material is usually associated with high hardness, which is, in essence, proportional to the degree of covalent bonding and the bond strength40. Additional benefits of field applied infra-red reflective technology include applications on handrails, playground equipment, metal steps, and other architectural features that can become hot to the touch when exposed to sunlight. Int J Sci Eng Tech 2016; 5: 213–216. Musil J, Vlček J, Zeman P . Controllable optical activity with non-chiral plasmonic metasurfaces. To avoid reflectivity loss and poor adhesion, the hard protection layer has to be very thin, usually a few dozen nanometers in thickness; thus the protection layer is often ineffective at resisting scratch damage9, 10, 29. The preparation parameters were kept constant as follows. Phone: 417-862-5738, Download Precision Coatings’ Electronic Product Binder, Case History City of Sparks Marina Park Walkways, Improved safety with reduced temperatures on substrates, Reduced expansion and contraction of substrate materials, Extended color life-cycle of infra-red reflective pigments. Thin Solid Films 1995; 266: 14–19. Reflective coatings reflect the infrared incident radiation on a surface, reduce the radiation absorbed by the building surfaces and therefore decrease the cooling energy consumptions during summer. Reflect 3000 is less than 50 grams per liter VOC. Design and one-step preparation of multilayer films of HfNx. The reflectivity of a pure HfN film is only 77%, while that of the doped film increases abruptly to 95%, close to that of an Al film (97%) over a spectrum of 3 to 12 μm. Sunlight can be used a source of light in buildings and automobiles, however infrared wavelengths in sunlight result in heating. It is sometimes narrowed to 3.7-4.8 μm. Light Sci Appl 2016; 5: e16134. How to significantly increase the reflectivity of a TMR will be the key to solving the issue of needing a high durability and a high reflectivity. S3c). The infrared-reflective roofing granules include base rock or mineral granules covered with a water resistant coating material comprising the above-described infrared-reflective clusters. P: 417-862-5738 E: Abstract: A composition includes polymer and dispersed infrared-reflective clusters of titanium dioxide primary particles. (2020). The titanium dioxide primary particles are cemented together with precipitated silica and/or alumina to form clusters. In this work, Infrared Reflective Coatings are designed using thin films to transmit visible wavelengths 400~700 nm while reflecting infrared wavelengths above 700 n… The infrared reflective, inorganic pigments actually work optimally in the darker colors when compared on a color-for-color basis to standard, organically pigmented paints, the differential generally running 20 to 50 degrees F. cooler for specialized, mixed-metal oxide pigmented coatings. Ceram Int 2016; 42: 982–985. substrate bias: −160 V; substrate temperature: 200 °C; Ar flow rate: 80 sccm; N2 flow rate: 2.8 sccm; sample rotation rate: 5 r min−1. Spectrally selective ultra-high temperature ceramic absorbers for high-temperature solar plants. The other process involves heating glass to high temperatures in a chemical vapor, so the coating material condenses onto its surface. Cool coatings with high near infrared transmittance for coil coated aluminium. In another embodiment, a method of making infrared-reflective clusters of titanium dioxide primary particles includes the following steps. L′ and M′ standard stars for the Mauna Kea Observatories near-infrared system. Appl Phys Lett 2013; 102: 031910. Because Al is the most commonly used infrared-reflective coating material8, 9, we conduct the same tests on an Al film as a comparison. Another way to save energy … The hydrophobic infrared-reflective pigment particles adhered to the textiles via an elastic adhesive layer, thus the SH coating is robust. Precision Coatings supplies high performance coatings for both exterior and interior commercial architect... SlipShield® is a slip-resistant extended life-cycle coating for tile, concrete and polished stone. We recommend transition metal compounds, TMRs (TM=Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W; R=B, C, N), as the durable base material and then improve its reflectivity by incorporating silver/gold to form an alloy or by overcoating a multilayer stack to achieve the integration of durability and reflectivity. S6). 135 Eur Phys J B 2007; 60: 305–312. (d–f) The transmission spectra d, the refractive index and hardness e and appearance f of HfNx films with different stoichiometries x, where the three optical characteristics are revealed: an opaque metal (OM, x=1.039), a high-refractive-index transparent semiconductor (HT, x=1.334–1.342, n=2.78–2.69) and a low-refractive-index transparent semiconductor (LT, x=1.383–1.396, n=2.17–2.08). Xu YJ, Liao JX, Cai QW, Yang XX, Liu YP . These results show that Ag-doped HfN films have much higher durabilities and stabilities of the reflectivity than Al/SiO2 films. They are used mainly on the horizontal surfaces of light construction buildings to create cool roofs. An infrared (IRT) reflective flake as claimed in claim 1wherein the core flake is aluminium and has a thickness in the range 0.03 to 0.04 μm. An energy dispersive spectrometer equipped in a field-emission scanning electron microscope (SU8010, Hitachi, Tokyo, Japan) was used to determine the chemical composition of the Ag-doped HfNx films. In conclusion, by exploiting the tunable properties between reflectivity and transmission induced by electron localization, we successfully achieve HfNx-only multilayer films with both high infrared reflectivity and high durability. By analyzing the transmission spectra, we obtained the refractive indices and absorption coefficients, using a procedure reported by Swanepoel30. Chemistry is mobilizing for the future: smart and BASF jointly developed the concept car smart forvision. J Astron Telesc Instrum Syst 2015; 1: 044002. SPIE: Marseille, France. https://doi.org/10.1038/lsa.2017.175, DOI: https://doi.org/10.1038/lsa.2017.175, Applied Materials Today Alling B . The coatings thus obtained not only have an infrared reflectivity performance close to that of aluminum but also have a far better durability. To obtain The samples were immersed in a 5.0 wt.% NaCl solution and incubated at 35±1 °C for 1, 5, 10, 15, 30, 60, 120 and 180 min and 10 days (14 400 min). The proportional relationship above between Ep and R(E) has been well demonstrated by previous simulations and experiments38. This is caused by the relatively high IR emittance of coating 2. We were the only ones in the industry to offer a hotspot reducing AR coating. The Hf vacancy and phase transition in the film are identified via high-resolution transmission electron microscopy, selected area electron diffraction, Raman, X-ray diffraction and XPS (see Supplementary Section 2). Acta Mater 2012; 60: 5601–5614. Edalati K, Horita Z . They are used mainly on the horizontal surfaces of light construction buildings to create cool roofs. ZEFFLE IR maintains a high level of solar reflectance for longer than other coatings because it is more resistant to soiling than any other fluoropolymer paint. The selected IR reflective pigments block 90% of the sun’s radiant heat. In Al, for example, the abundance of free electrons renders an excellent infrared reflectivity, but the electrons and the metallic bonds result in high corrosion and a low hardness, leading to a poor durability8, 10. REFLECT 3000 uses an automotive-grade acrylic aliphatic polyurethane resin system while Precision’s REFLECT 5000 uses an advanced polysiloxane resin system. It works by targeting the invisible infrared portion of the sun’s radiation which means coated surfaces stay cooler and last longer than a coating that absorbs it. Integrating polarization conversion and nearly perfect absorption with multifunctional metasurfaces. Bourguille J, Brinza O, Zerr A . Broadband IR Coatings 2.1. Gao FM, He JL, Wu ED, Liu SM, Yu DL et al. S3c). In this work, Infrared Reflective Coatings are designed using thin films to transmit visible wavelengths 400~700 nm while reflecting infrared wavelengths above 700 nm. Zerr A, Miehe G, Riedel R . Delin A, Eriksson O, Ahuja R, Johansson B, Brooks MSS et al. New design for highly durable infrared-reflective coatings. Alibaba.com offers 996 infrared reflective coating products. To verify the reflectivity boost at a specific target wavelength, we develop a novel homogeneous multilayer film with three significant optical characteristics consisting entirely of HfNx. reduce the resulting reflectance in the near infrared. For a better comparison, an undoped HfNx film was also prepared under the same deposition conditions, except that the RF power of the Ag target was turned off.