When you picture a thermometer, you may imagine having your temperature checked at the doctor’s office. But did you know there are photonic thermometers, which measure temperature using light? NIST researchers designed a way to combine these photonic thermometers – which are faster and smaller than traditional thermometers – using a dual frequency comb system. The latter has been used for measuring small amounts of greenhouse gases. This combined system allows researchers to test these photonic thermometers, or sensors, 10 to 1,000 times faster than current methods. This feat brings this type of technology a step closer to commercialization. Because these sensors measure data like strain and humidity, they can be embedded into the building materials, like concrete, as a building or bridge is built. As the concrete sets, the sensors measure these properties about the structure, giving engineers important information about how the structure formed. This could ultimately help with predicting how these structures will fare over time. Learn more about this technique: https://lnkd.in/gTEJqR4U #Physics #Photonics #Sensors #BuildingMaterials #Measurement
National Institute of Standards and Technology (NIST)’s Post
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💡 Optical fiber sensors offer several advantages over traditional sensors, including: High sensitivity: Can detect very small changes in temperature, pressure, strain, or other physical parameters, making them ideal for a wide range of applications. High accuracy: Can provide highly accurate measurements, which is critical in applications such as structural monitoring, medical sensing, and environmental sensing. Remote sensing: Can be used for remote sensing, as they can transmit data over long distances without significant loss of signal quality. Immunity to electromagnetic interference: Not affected by electromagnetic interference, which is a major advantage in applications where electromagnetic fields are present, such as in power plants or manufacturing facilities. Durability: Highly durable and can withstand harsh environments, such as high temperatures, radiation, and corrosive chemicals. Cost-effectiveness: Can be more cost-effective than traditional sensors, especially when used for long-term monitoring, as they require less maintenance and calibration. Due to these advantages, optical fiber sensors are widely used in a variety of applications, including #StructuralHealthMonitoring, #Aerospace and #Automotive #Engineering, #Environmental #Monitoring, and #Biomedical #Sensing. 🚀🚀🚀 #photonics #opticalfiber #innovation #fiberoptics #sensortechnology #opticalfibersensors #optica #research #lasers #itsallaboutsensing
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Scientists have developed revolutionary dynamic windows that offer THREE amazing modes for a more energy-efficient and comfortable living. 💡 1️⃣ Transparent Mode: Enjoy clear, unobstructed views. 2️⃣ Heat Blocking Mode: Keep your space cooler by blocking infrared light. 3️⃣ Tinted Mode: Reduce glare while maintaining visibility. 🪟 The key? Water! When bound within tungsten oxide hydrate, these windows display a remarkable behavior. Injecting lithium ions and electrons into the material allows you to toggle between modes effortlessly. Read the full article here: https://ow.ly/C8vi50PTRTZ #WindowTechnology #EnergyEfficiency #Innovation #ScienceNews
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Online First | Reconfigurable Intelligent Surfaces: Design, Implementation, and Practical Demonstration by Feng Yijun, Hu Qi, Qu Kai, Yang Weixu, Zheng Yilin, Chen Ke, Nanjing University Links: https://lnkd.in/eja3TC-G Abstract Metasurfaces, ultrathin two-dimensional versions of metamaterials, have attracted tremendous attention due to their exotic capabilities to freely manipulate electromagnetic (EM) waves. By incorporating various tunable materials or elements into metasurface designs, reconfigurable metasurfaces and related metadevices with functionalities controlled by external stimuli can be realized, opening a new avenue to achieving dynamic manipulation of EM waves. Recently, based on the tunable metasurface concept, reconfigurable intelligent surfaces (RISs) have received significant attention and have been regarded as a promising emerging technology for future wireless communication due to their potential to enhance the capacity and coverage of wireless networks by smartly reconfiguring the wireless propagation environment. Here, in this article, we first focus on technical issues of RIS system implementation by reviewing the existing research contributions, paying special attention to designs in the microwave regime. Then, we showcase our recent attempts to practically demonstrate RIS systems in real-world applications, including deploying reflective RIS systems in indoor scenarios to enhance the wireless network coverage and utilizing intelligent omni-metasurfaces to improve both indoor and through-wall wireless communication quality. Finally, we give our own perspectives on possible future directions and existing challenges for RISs toward a truly commercial intelligent technology platform. Keywords: Reconfigurable intelligent surface, Metasurface, Wireless communication Citation: Yijun Feng, Qi Hu, Kai Qu, et al., “Reconfigurable Intelligent Surfaces: Design, Implementation, and Practical Demonstration,” Electromagnetic Science, vol. 1, no. 2, article no. 0020111, 2023. doi: 10.23919/emsci.2022.0011 #ElectromagneticScience #antenna #microwave #photonics #science #electronics
Reconfigurable Intelligent Surfaces: Design, Implementation, and Practical Demonstration
emscience.org
That looks like a nice EO comb in the background!