  We analyze the condition of photo-induced atomic-scale chirality and magnetic
toroidal moment. By performing a high-frequency expansion in the Floquet
formalism, we derive an effective static model Hamiltonian from the spinful
$s$-$p$ hybridized model of a single atom interacting with an electromagnetic
wave with a particular polarization. The lowest-order and third-order
contributions in the high-frequency expansion give rise to the coupling to
induce an electric toroidal monopole corresponding to microscopic chirality,
while the second-order contribution provides the coupling to induce a magnetic
toroidal dipole. We also discuss the condition of the polarization of the
electromagnetic wave and induced multipoles. Our results stimulate a new
direction of controlling unconventional multipoles by electromagnetic waves.
