Proof corrections regarding manuscript AT11700 (Nguyen et al.): Specific questions on the proof cover page: Q1: Regarding the removed word "new", this was supposed to refer both to cavity geometries and resonant structures, and indicate a deviation from the conventional cavity-QED geometry of nearly flat mirrors with a short physical spacing. To avoid the misunderstanding of a novelty claim, we suggest to replace this with "other" rather than dropping it. Reference is here made mostly to fiber cavities and photonic bandgap structures, but also to our line of work. Our recommendation would be to start the sentence "Therefore, other types of cavities and resonance structures..." Q2: Spelling out quantum electrodynamics is correct, thank you. Q3: Removal of (a.u.) in figure 6 label of y-axis. This creates the wrong impression that a value of 1 corresponds to 100% transmission. Please use "normalized transmission" as an axis label to ensure nobody thinks we have 100% cavity transmission. Q4: The journal title for reference 13 is "Applied Physics B", without the "Photophys. Laser Chem." subtitle. Please change the journal name to "Applied Physics B" only, or whatever is standard for the article the link in the proof correctly points to. Q: Reference 5 claims to be referenced as "Kevin C Cox et al., J. Phys. B: At. Mol. Opt. Phys. 51, 195002 (2018)" on the IOP web site (see https://doi.org/10.1088/1361-6455/aaddd1 ). Please adapt the corresponding PRA referencing style for this journal article. FQ: The funding agencies identified in the manuscript both to refer to institutions in different countries. The correct references should be: 1. Ministry of Education - Singapore (fundref: http://dx.doi.org/10.13039/501100001459 ) 2. National Research Foundation-Prime Minister's office, Republic of Singapore (fundref: http://dx.doi.org/10.13039/501100001381 ) Additional changes in the main text: A1: Spelling of names The given names of the first author should be separated: Please use "Chi Huan Nguyen" instead of "ChiHuan Nguyen"