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Optical Rectennas Market Overview
Rectennas are made up of two parts: an antenna that receives electromagnetic radiation and a diode that turns the absorbed energy into direct current. Optical rectennas, which convert electromagnetic fields at optical frequencies into electrical current, perform best when manufactured on the micron or sub-micron scales, which are far smaller than devices that convert longer-wavelength radiation, such as radio waves. The issue is that as these devices reduce in size, their electrical resistance increases, severely restricting their power output.
Key Takeaways:
- Optical rectennas can revolutionize renewable energy by allowing engineers to gather energy from heat that moves from Earth to space.
- Researchers reveal in a recent study that they have constructed the world's first optical rectennas capable of producing power. Scientists at the University of Colorado Boulder used a poltergeist-like feature of electrons to create devices that can gather surplus heat from their surroundings and convert it to useable power.
- Switching to airs table diode materials resulted in improvements in optical rectennas. The novel gadget concept, which combines a carbon nanotube antenna with a diode rectifier, might compete with traditional photovoltaic methods for generating power from sunshine and other sources. The same technology employed in rectennas might be utilized to convert heat energy straight to electricity.
- Rectennas could prove beneficial for powering Internet of Things (IoT) devices, particularly if they can generate electricity from scavenged thermal energy. The mechanism for converting heat to electricity is the same as for light — collecting oscillations in a field with a broadband carbon nanotube antenna.
Growing Market Applications –
Increasing Demand from Energy Sector
Optical rectennas can be used to generate electricity. Because the need for energy is increasing at a rapid pace, optical rectennas have enormous promise in the power industry. Electricity consumption has increased as a result of technological improvement and urbanization. Electricity demand is expected to grow at a 3% annual rate over the next decade. According to the International Energy Agency (IEA), coal generates 40% of power while solar generates just 4%, creating a huge opportunity for optical rectennas over the next decade. The market for optical rectennas is likely to be driven by continuous industrialization and increased electrification of the manufacturing sector. Recent smart city infrastructure development has depended largely on energy for a variety of utilities such as lighting, public transit, and communication. Technological advancement has led in the development of appliances and electronic devices that require a lot of power. In recent years, the manufacture of smart devices, gadgets, and other new technology-intensive items has contributed to increased power usage. The advent of electric transportation, such as electric automobiles and buses, has also boosted power usage. As more nations embrace electric cars, the demand for charging infrastructure and power supply has increased significantly, increasing the demand for energy, and optical rectennas can assist to balance the world's demand and supply of electricity.
Solar Energy Harvesting
Continuous research is being conducted to increase the efficiency and scalability of optical rectennas for real-world applications in renewable energy. The primary use of optical rectennas in renewable energy is to generate power from sunshine. Optical rectennas use an antenna and a rectifying diode to convert electromagnetic waves, including those in the optical and infrared spectrums, into direct current (DC), offering a novel technique to gathering and converting light energy.
The optical rectenna concept has a lot of potential for solar power generation, especially when it comes to gathering light energy and transforming it into electricity. Optical rectennas are devices that use sunlight or infrared radiation to create power. When compared to regular solar cells, optical rectennas provide significant benefits in terms of performance and efficiency when catching light at a certain wavelength. Traditional solar cells have limited efficiency because they absorb certain wavelengths, however optical rectennas might overcome this constraint by absorbing a wide variety of wavelengths and then converting those wavelengths to power, boosting efficiency. It has been discovered that optical rectennas may be integrated with existing photovoltaic technology to increase system performance. The combination of traditional solar cells and optical rectennas may result in a more adaptable and efficient solar energy gathering system. Solar rectennas have a practical efficiency of more than 75% when compared to standard photovoltaic cells.
Ongoing Research Study Across Universities and Institutions
Graduate students and researchers at universities and research institutes contribute actively to the discovery and progress of optical rectenna technology. Various universities throughout the world do a huge amount of research. Some of the world's best institutions are constantly working on the development of optical rectennas. According to the institution, some of the ongoing development and research are listed below:
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The Massachusetts Institute of Technology (MIT), noted for its nanotechnology and energy-related research, is participating in initiatives involving the creation and optimization of optical rectennas. Another university in the United States
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At the Swiss Federal Institute of Technology (ETH Zurich), which is known for its engineering and technology research, studies using optical rectennas are part of research programs within the Departments of Physics and Electrical Engineering.
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The National University of Singapore (NUS), which is always working on nanotechnology and materials science research, has optical rectenna studies being undertaken inside the Faculty of Engineering or the Institute for Materials Research and Engineering.
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The Georgia Institute of Technology created a novel technology using optical rectennas that can capture light from the sun or other sources using nanotubes as antennas. When light waves strike the antenna, they generate an oscillating charge that flows through the rectifier devices connected, providing a tiny amount of current.
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