A team of researchers affiliated with several institutions in China and one in Germany has investigated the possibility of extending maser techniques to Floquet systems. In their paper published in the journal Science Advances, the group describes their approach to creating a new type of maser by amplifying radio frequencies in Floquet systems. Ren-Bao Liu, with the Chinese University of Hong Kong, has published a Perspectives piece in the same journal issue outlining prior work with extending the capabilities of masers and the work done by the team on this latest effort.
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Source: Phys.org