The excitation characteristics of surface plamons of the antimonene nanostructure was studied by time-dependent density functional theory (TDDFT). The absorption spectra were given for impulse excitations polarized in the armchair-edge direction (X-axis) and zigzag-edge direction (Y-axis). The edge configuration effects the absorption spectrum. The distribution of indued charge infers thethe main plasmon resonance modes are the bonding dimer plasmon mode(BDP) in the low-energy resonance region.
