The normalization factor N ≡ (πσσ c ) -1/2 is given in terms of the widths of the Gaussian wavepackets located in the phase space centered at z 0 ≡ (q 0 , x c0 , p 0 , p c0 ) satisfying total energy H(z 0 ) = E k . In what follows, we show the projection of the Husimi distributions onto the system phase space with the sectioning condition corresponding to Fig. (a) by fixing x c0 = 0 and the allowed values for p c0 obtained from the energy constraint. The nature of the dominantly contributing polariton states for q i = -0.9 au can be seen in Fig. wherein both the coordinate space density |χ k (q, x c )| 2 and their corresponding Husimi representations are shown. It is readily apparent from the figure that states k = 5, 6 belonging to the X 1 manifold, k = 12 from the X 2 manifold, and k = 13 from X 3 manifold, contribute significantly to the initial polariton wavepacket and have a dominant photon character. Indeed, the coordinate space densities are localized along the 1:1 resonant orbit shown in Fig. (c) and, consistently, the phase space densities of these states have maximum support in the 1:1 nonlinear resonance island. Although not shown here, other significantly contributing states k = 20, 21 are also localized in the reactant well and mainly photonic in nature. Thus, the nature of the dominating polariton states corroborates the reasoning that the suppression observed in Fig. (a) arises from a resonant localization.