This value of λ is quite large and leads to a coupling energy scale hg ≈ h ω 2 λ µ ≈ 1eV , which is approximately 10 times larger than the single molecule coupling strength reported by Baumberg and co-workers . However, as in Ref. 31 where the same coupling magnitude was considered to illustrate cavity modifications to intermolecular interactions, we note that such coupling strengths could be conceivable considering that experimental cavities will have many modes and the effective coupling arises as the norm of all the mode coupling parameters.