Moreover, when the cavity loss rate increases, the magnitude of of reaction ratio inside the cavity also decreased, as shown in Fig. . This is more clear for a reasonably large coupling strength g c = 0.05 a.u. Normally, one would expect that when the loss rate is much larger than the Rabi splitting, the hybrid system will go back to the weak coupling regime and one will no longer observe the Rabi splitting from spectroscopy measurements. For the reactivities of the molecule, one can also see an enhanced suppression of the forward reaction from the cis to the trans isomer. This is because the |E 1 ⟩ exciton state very quickly decays to the ground polariton states, thus preventing the isomerization from happening in the excited states. These numerical results could provide theoretical insights into the original Ebbesen experiments on photo-isomerization. 8 This means that even for a lossy cavity, one can protect the molecule from being isomerized by coupling it to a resonant cavity, resulting in suppressed reactivities. Of course, we emphasize that we are only simulating a single molecule coupled to the cavity, whereas most of the experiments are conducted under the collective coupling regime where a lot of molecules are coupled to the cavity.