  We propose a Gaussian quantum illumination(QI) protocol exploiting
asymmetrically squeezed two-mode(ASTM) light that is generated by applying
single-mode squeezing operations on each mode of the initial two-mode squeezed
vacuum(TMSV) state. We show that the performance of our protocol can approach
that of the conventional Gaussian QI with the same probe energy under certain
conditions, when we have an obstacle of attaining a bright TMSV state.
Additionally, an ASTM state provides a counterexample of the previously claimed
relation between the quantum advantage in the Gaussian QI and the quantum
discord by showing their opposite behavior.
