Fig. shows the polaritonic energy as a function of the coupling strength for the SWCNT system when the cavity is in resonance with the bright E 11 transition, showcasing the many optically inactive (weakly dipole-coupled) molecular states housed in the same region of energy. The colorbar indicates the percent of photonic character. In this case, one is able to note the nearly symmetric Rabi splitting due to the inactivity of the nearby states acting essentially as spectator states until extremely large coupling of A 0 ∼ 0.02 a.u. where all states begin to exhibit a decrease in energy.