Shedding light on topological superconductors
journal contributionposted on 14.08.2018, 11:44 by K.H.A. Villegas, V.M. Kovalev, Feodor Kusmartsev, I.G. Savenko
We propose an effective optical approach to monitor superconductors in a two-layer superconductor-normal metal structure. Effectively, such a hybrid system represents a resonator, where electrons are strongly coupled with light. We show that the interaction of light with the superconductor is strongly boosted in the presence of the neighboring metal and, as a result, the electromagnetic power absorption of the system is dramatically enhanced. It manifests itself in a giant Fano-type resonance which can uniquely characterize the elementary excitations of the system. Our approach is especially promising for topological superconductors, where Majorana fermions could be revealed and controlled by light.
V.M.K. has been supported by the Russian Foundation for Basic Research (Project No. 16-02-00565). K.H.V. and I.G.S. acknowledge the support of the Institute for Basic Science in Korea (Project No. IBS-R024-D1).