Technion researchers present the first-ever observation of the Cherenkov radiation phenomenon in a two-dimensional space. The researchers from the Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering at the Technion – Israel Institute of Technology have presented the first-ever ex
A single free electron propagates above the special layered structure that the researchers engineered, only a few tens of nanometers above it. During its movement, the electron emits discrete packets of radiation called “photons”. Between the electron and the photons it emitted, a connection of “quantum entanglement” is formed. Credit: Ella Maru Studio
Cherenkov radiation is a unique physical phenomenon that has been utilized for a number of years in medical imaging, particle detection, and laser-driven electron accelerators. The researchers from Technion linked this phenomenon to potential future applications in photonicPhysical Review X It is the optical equivalent of a supersonic boom, which occurs, for example, when a jet travels faster than the speed of sound. Consequently, Cherenkov radiation is sometimes called an “optical shock wave.” The phenomenon was discovered in 1934. In 1958, the scientists who discovered it were awarded the Nobel Prize in Physics.
The researchers engineered a special multilayer structure enabling interaction between free electrons and light waves traveling along a surface. The smart engineering of the structure allowed for the first measurement of 2D Cherenkov radiation.
Prof. Kaminer commented: “Radiation emitted from electrons is an “old” phenomenon that has been researched for over a hundred years and was assimilated into technology a long time ago, an example being the home microwave oven. For many years, it seemed that we had already discovered everything there was to know about electron radiation, and thus, the idea that this kind of radiation had already been fully described by classical physics became entrenched.
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