Angular-dependent Andreev reflection on a polaritonic superfluid
Mesoscale and Nanoscale Physics
2022-12-12 v1
Abstract
We study analytically an analog of the Andreev reflection at a normal-superfluid interface. The polariton gapped superfluid region is achieved by quasi-resonant optical pumping. The interacting polaritons are described with the driven-dissipative Gross-Pitaevskii equation. We find analytical formulas for the angles and amplitudes of the reflected and transmitted particles. There are limit angles and energies, above which Andreev reflection/transmission cannot be observed anymore and where the Andreev wave becomes a surface mode, exponentially localized on the interface. These properties are confirmed by solving numerically the Gross-Pitaevskii equation in simulations reproducing realistic experimental conditions.
Keywords
Cite
@article{arxiv.2212.04874,
title = {Angular-dependent Andreev reflection on a polaritonic superfluid},
author = {I. Septembre and D. D. Solnyshkov and G. Malpuech},
journal= {arXiv preprint arXiv:2212.04874},
year = {2022}
}