Stress-modulated exciton polariton Josephson effect in a semiconductor microcavity

Abstract

We demonstrate that the exciton polariton Josephson effect can be effectively modulated by a uniaxial stress in a semiconductor microcavity. By increasing the stress, we can show there are two critical transition stresses, which correspond to the 0-π and dc-ac transition, respectively. We find that the ac Josephson frequency increases with the stress and the macroscopic quantum self-trapping can appear by regulating the stress. We also find that the Shapiro steps emerge under appropriate conditions, but some steps are suppressed. In contrast to a conventional superconducting tunnel junction, it is exposed that all the rich phenomena come from the competition between the interaction of exciton polaritons and the energy difference induced by the stress. It is feasible that these results can be experimentally verified.