  The recent discovery of the Weyl semimetal CeAlSi with simultaneous breaking
of inversion and time-reversal symmetries has opened up new avenues for
research into the interaction between light and topologically protected bands.
In this work, we present a comprehensive examination of shift current and
injection current responsible for the circular photogalvanic effect in CeAlSi
using first-principles calculations. Our investigation identifies a significant
injection current of 1.2 mA/V$^2$ over a broad range in the near-infrared
region of the electromagnetic spectrum, exceeding previously reported findings.
In addition, we explored several externally controllable parameters to further
enhance the photocurrent. A substantial boost in the injection current is
observed when applying uniaxial strain along the $c$-axis of the crystal $-$ a
5% strain results in a remarkable 64% increment. The exceptional photocurrent
response in CeAlSi suggests that magnetic non-centrosymmetric Weyl semimetals
may provide promising opportunities for novel photogalvanic applications.
