  Despite constituting a noteworthy $\sim 27\%$ share of the total energy
budget of our Universe, dark matter (DM) has thus far eluded direct
observations. Owing to its pervasive nature, there is a sincere expectation
that astrophysical black holes (BHs) encompassed by DM should leave distinctive
imprints on the gravitational waves arising from BH mergers. Theoretical models
of DM present a diverse landscape of possibilities, with perfect fluid dark
matter (PFDM) emerging as a recent and notably intriguing candidate model. In
this work, utilizing the established quantum optical approach, we investigate
the possibility of catching DM signatures via acceleration radiation emitted by
a freely-falling detector (e.g. an atom) within a PFDM-surrounded Schwarzschild
BH. The setup involves a Casimir-type apparatus where the detector interacts
with the field, and this situation induces excitations in the detector in a
manner consistent with Unruh effect. We observe that our DM candidate, while
making classical contributions to spacetime geometry, has the potential to
leave quantum imprints in the radiation flux. Notably, it is observed that, in
comparison to a pure Schwarzschild BH, PFDM can markedly reduce particle
emission as long as its density remains below a critical threshold, and vice
versa. Given the lessons we have learnt from realizing cosmological phenomena
in simulated laboratory conditions, there is a remote possibility that such
study may perhaps provide insights (to whatever degree !) into the future
table-top experiments in analogue gravity paradigm.
