Researchers have come up with a new and highly efficient optical limiter using a novel 2D material, ‘hematene’.
- Nanoflakes of a material called hematene extracted from iron ore have been found capable of withstanding and acting as shield from high laser intensities.
- Hence it could be used to make devices called optical limiters that can protect sensitive optical equipment from light-induced damage.
- Radiation from laser sources is highly concentrated and powerful and can be detrimental to sensitive equipment such as sensors, detectors, and other optical devices.
- When the input intensity increases optical limiters control the amount of light that passes through, thereby preventing damage to the optical component.
- These devices are often useful in laser technologies, military, telecommunications, aircrafts, and scientific research in several ways.
- They found that 2D nanoflakes of hematene is capable of withstanding very high laser intensities, and they exhibited excellent optical limiting of green laser light (532 nm) while maintaining a high linear transmission (about 87%) for low-intensity light.
Key facts about Hematene:
- It is extracted from naturally occurring hematite, the mineral form of iron(III) oxide, using a combination of sonication, centrifugation and vacuum-assisted filtration.
- It measures 3 atoms thick and has a more efficient photocatalysis.
- It is ferromagnetic (the mechanism by which certain materials like iron form permanent magnets, or are attracted to magnets) like a common magnet.
- It is capable of withstanding and acting as shield from high laser intensities
Q) What is an Ore?
Ore refers to a naturally occurring mineral or rock that contains a valuable substance, usually a metal or valuable mineral, in sufficient amounts to make mining economically feasible. These minerals or metals are typically extracted and processed to obtain the valuable elements they contain.