Figure 1.

a) Jablonski diagram of a vibrational transition at energy $\hslash \omega$ ($|\nu ⟩\to |\nu +1⟩$ ), strongly coupled to an optical cavity mode ($|n⟩\to |n+1⟩$ ) at energy $\hslash {\omega }_c$ giving new hybrid vibro‐polaritonic states $|V{P}^{+}⟩$ and$|V{P}^{-}⟩$ , with an energy separation$\hslash {\Omega }_R$ (the Rabi‐splitting). b) Angle $\theta$ between the electrical dipole moment $\overrightarrow{E_0}$ of the incident light and the orientation of the transition dipole moment $\overrightarrow{\mu }$ associated with the coupled state of the molecule. Also shown is the molecule used in this study (5CB, R=pentyl), which has a C≡n stretch vibration in the long axis direction of the molecule.