  The photon-electron interactions are generally volatile and the intricate
multiphysics details of photoexcited carrier dynamics are not yet
distinguished. How to nonvolatile control the physical state through
all-optical means and clarify the intricate physical processes has been a
long-term goal pursued in polar materials. Photoferroelectric {\alpha}-In2Se3
holds the great potential for capturing multimodal nonvolatile states due to
the spontaneous reversible in-plane and out-of-plane polarizations and its
tunable light-matter interactions arising from the electronic degree of
freedom. Here we uncover a nonvolatile zero-bias ultrafast photocurrent
hysteresis response with an all-optical scheme, diagnosed by in-plane and
out-of-plane terahertz waves emitted from the photoferroelectric
{\alpha}-In2Se3. The mechanism of such ultrafast photocurrent hysteresis
emerges as a result of anomalous bulk linear and circular photovoltaic effect
synchronously driven by local polarization rearrangement. Utilizing anisotropic
ferroelectric kinetics-induced relative phase between the in-plane and
out-of-plane directions, we further show flexibly selective chirality, tunable
rotational angle, and optimizable ellipticity of terahertz wave polarizations.
Our finding offers a promising avenue towards direct ultrafast nonvolatile
processing of photocurrent signals through an all-optical scheme.
