American engineers developed optical rectennas to turn light directly into DC
Recently, engineers at the Georgia Institute of Technology in the United States have developed an optical rectifying antenna that converts light directly into direct current. Researchers believe that this achievement is expected to provide a new light detection technology that does not require refrigeration, and can also collect waste heat into electricity, and eventually become a new way to use solar energy. The optical rectifying antenna can operate at temperatures between 5 ° C and 77 ° C and uses carbon nanotubes as an antenna to capture sunlight or other light sources. When light waves strike the nanotubes, the generated oscillating charge passes through the rectifier, which switches at a frequency of gigahertz to produce tiny direct current. Although the current efficiency of the device is only 1%, billions of rectennas are arrayed to generate a powerful current. Rectifier antennas were developed in the 1960s and 1970s and generally operate in the wavelength range of about 10 microns. The new rectennas enter the visible range, requiring antennas and rectifier diodes to be small enough to capture electromagnetic oscillations very quickly. Barattid Kola, an associate professor at the George Woodrough School of Mechanical Engineering, explained: "The rectenna is essentially an antenna with a diode, but in the visible range, it means using a nano-antenna with a metal-insulation-metal. Diodes. The closer the antenna is to the diode, the higher the efficiency. Therefore, the ideal structure is to use the antenna as the metal in the diode - this is the structure we made." According to the physicist's organization network, the researchers first developed vertically aligned carbon nanotube bundles on a conductive substrate, and then used a variety of nanofabrication techniques to create a metal-insulator-metal multilayer rectifier. In operation, the oscillating wave of light passes through the calcium-aluminum electrode and interacts with the nanotube. The rectifier at the top of the nanotube can switch at femtosecond speed, allowing the electrons generated by the antenna to enter the electrode from only one direction. Kola said that the current rectifying antennas need to improve efficiency. Opening carbon nanotubes to achieve multi-conducting channels and reducing resistance will eventually result in solar cells with twice the current efficiency and lower cost. Researchers also hope to increase output power through optimization techniques, and they believe that commercially available rectennas may appear within a year. Related papers were published online on September 29th (Beijing time) in Nature·Nanotechnology. The wireless charging technology that is highly anticipated is the rectifying antenna, which converts electromagnetic waves into energy. In the past, the rectifying antenna could only receive microwaves; this time, relying on nanotechnology, the rectifying antenna broke through the limit and finally captured visible light. It is very likely that the chip can be powered by artificially transmitted microwaves and solar energy in the future. jobs. At that time, not only did the network cover every corner, but mobile phone users did not need to use mobile power. Concerned about surprises
CNC optical accessories are precision components used in the manufacture of high-quality optical products. These accessories are precisely manufactured using computer numerical control (CNC) machines to ensure accuracy and consistency.
Optical accessories produced using CNC machines include high-quality lenses, mirrors, prisms, and filters. These components are essential in optical devices, such as microscopes, telescopes, cameras, and laser systems.
CNC optical accessories are produced using a range of materials, including glass, quartz, and metal. The CNC machines can produce these accessories to exacting specifications, ensuring that each component is precisely crafted to meet the desired specifications.
One of the significant advantages of CNC optical accessories is their precise and consistent performance. The CNC machines used in their manufacture can produce components with extremely tight tolerances, resulting in optical accessories that offer superior quality and performance.
Another advantage of CNC optical accessories is their versatility. The CNC machines can produce components in a range of shapes, sizes, and designs, making them suitable for many different applications. They can also produce parts with intricate shapes and geometry, allowing for the creation of complex optical systems and devices.
CNC optical accessories are widely used in many industries, including aerospace, medical, and defense. They are also used in research institutions, universities, and laboratories around the world. These components are essential in the development of advanced optical technologies and devices, including laser systems, optical sensors, and imaging equipment.
In conclusion, CNC optical accessories are a crucial component in the manufacture of high-quality optical products. They offer high precision, consistency, and versatility, making them an essential tool for a variety of industries. With their ability to produce intricate shapes and geometry with high accuracy, CNC optical accessories offer a powerful solution for the creation of advanced optical systems and devices.
Eyewear Accessories,Men'S Optical Frames,Women'S Optical Frames,Mens Designer Optical Frames Lizhi Precision Manufacturing Technology Co.,Ltd , https://www.lizhihardware.com