The Aharonov-Casher (AC) effect where spin phase is modified by an electric field is a fundamental concept of quantum mechanics. The AC spin interferometer is an invaluable to probe spin phases information. We demonstrate a gate-controlled anisotropy in AC spin interferometry using InGaAs mesoscopic rings. The coexistence of Rashba and Dresselhaus spin-orbit interactions (SOIs) manifests as an AC resistance amplitude modulated by the direction of in-plane magnetic field as a probe. We establish ways to manipulate spin dynamic and geometric phases freely by introducing electric and magnetic tuning. Our experimental results are well explained by perturbation theory and numerical analysis performed at constant Dresselhaus spin-orbit interaction (SOI) strength except for one additional anisotropic reversal by tuning Rashba SOI. The observed additional AC resistance anisotropy reversal is explained by sign change in linear Dresselhaus SOI .
 F. Nagasawa, et al., Phys. Rev. B 98, 245301 (2018)