  Inspired by recent advancements in the bulk photovoltaic effect which can
extend beyond the independent particle approximation (IPA), this study delves
into the influence of collective spin dynamics in an antiferromagnetic on
photocurrent generation using a time domain calculation. In the linear and
photocurrent conductivity spectra, we observe peaks below the bandgap regime,
attributed to the resonant contributions of collective modes, alongside
broadband modifications resulting from off-resonant spin dynamics. Notably, the
emergence of spin dynamics allows various types of photocurrent, which are
absent in the IPA framework. Furthermore, we emphasize the importance of energy
scale proximity between electronic and spin degrees of freedom in enabling
efficient feedback between them. These findings offer new avenues for efficient
energy harvesting and optoelectronic applications.
