  We propose an approach for the simultaneous reconstruction of the
electromagnetic and acoustic material parameters, in the given medium $\Omega$
where to image, using the photo-acoustic pressure, measured on a single point
of the boundary of $\Omega$, generated by plasmonic nanoparticles. We prove
that the generated pressure, that we denote by $p^{\star}\left(x, s, \omega
\right)$, depending on only one fixed point $x \in \partial \Omega$, the time
variable $s$, in a large enough interval, and the incidence frequency $\omega$,
in a large enough band, is enough to reconstruct both the sound speed, the mass
density and the permittivity inside $\Omega$. Indeed, from the behavior of the
measured pressure in terms of time, we can estimate the travel time of the
pressure, for arriving points inside $\Omega$, then using the eikonal equation
we reconstruct the acoustic speed of propagation. In addition, we reconstruct
the internal values of the acoustic Green's function. From the singularity
analysis of this Green's function, we extract the integrals along the
geodesics, for internal arriving points, of the logarithmic-gradient of the
mass density. Solving this (internal) integral geometric problem provides us
with the values of the mass density function inside $\Omega$. Finally, from the
behavior of $p^{\star}\left(x, s, \omega \right)$ with respect to the frequency
$\omega$, we detect the generated plasmonic resonances from which we
reconstruct the permittivity inside $\Omega$.
