Abstract
We investigate the effects of a Laguerre-Gaussian (LG) beam on the superconducting state. We show that the vortex angular momentum of a LG beam affects the superconducting state and induces currents. The induction of the current by microwave radiation is illustrated on a Josephson loop and SQUID devices. In particular, we establish that coupling a dc SQUID to the ac magnetic flux of a LG beam can stabilize the 𝜋 phase in the SQUID. This can happen via developing a global or local minimum in the effective potential at 𝜋. In the latter case, this happens via the Kapitza mechanism.
Published
Physical Review B
Links
https://doi.org/10.1103/PhysRevB.110.144519
