Fig. 3: Effective coupling strength.
a The effective coupling strength (solid light blue) and the fundamental cavity frequency (dashed purple) as a function of mirror seperation, Lc for a fixed reflectivity of 0.99. The inset shows a visualization of the part of q-space which contributes to the single effective mode. b The effective coupling strength aeff,s/ωc as a function of the mirror reflectivity for a symmetric Fabry-Pérot cavity with (purple) and without (light blue) the removal of the free space mode contribution. The ratio aeff,s/ωc is independent of the frequency, and it therefore provides a scale-invariant representation of the cavity single effective mode coupling strength in the Fabry-Pérot cavity. c The cavity mode functions, \(| {\bar{R}}_{{{{\bf{q}}}}_{\parallel },s,{q}_{z},F}|\), with (purple) and without (light blue) the free space contribution.
