Controlling Cherenkov angles with resonance transition radiation
- Lin, Xiao
- Easo, Sajan
- Shen, Yichen
- Chen, Hongsheng
- Zhang, Baile
- Joannopoulos, John
- Soljacic, Marin
- Kaminer, Ido
DOIAbstract
Cherenkov radiation provides a valuable way to identify high-energy particles in a wide momentum range, through the relation between the particle velocity and the Cherenkov angle. However, since the Cherenkov angle depends only on the material’s permittivity, the material unavoidably sets a fundamental limit to the momentum coverage and sensitivity of Cherenkov detectors. For example, ring-imaging Cherenkov detectors must employ materials transparent to the frequency of interest as well as possessing permittivities close to unity to identify particles in the multi-gigaelectronvolt range, and thus are often limited to large gas chambers. It would be extremely important, albeit challenging, to lift this fundamental limit and control Cherenkov...
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