Scientists from the Moscow Institute of Physics and Technology (MIPT), in collaboration with the company "Skanda Rus," have presented unique infrared photodetectors that do not require electricity to function. The development is based on a special metallic pattern with sharp edges applied to graphene. The pattern significantly enhances light absorption and controls the movement of electrons, leading to the formation of photocurrent.
Graphene is known for its outstanding characteristics, such as high electron mobility and a wide response spectrum. Its low light absorption has made it difficult to create effective detectors. The new metallic pattern solves this problem by enhancing the electromagnetic field at sharp edges and increasing the sensitivity of the device. Various pattern shapes, such as "saw" and "herringbone," allow detectors to distinguish light polarization and determine its direction.
The technology is suitable for mass production and can be used with other two-dimensional materials. Researchers are confident that the new photodetectors will find application in infrared cameras, thermal imagers, and other devices where compactness and energy efficiency are important. In the future, scientists plan to use new materials to increase sensitivity and expand the operating range of detectors.
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