“…Nowadays, this approach is recognized as a cornerstone of fabrication technology, particularly in the development of high‐performance nano‐devices. The Fabry‐Perot resonator is one of the most convenient and broadly used devices in photonics, particularly for engineering light‐matter coupling [ 1–3 ] and is commonly used in color filters, [ 4,5 ] two‐photon direct laser writing with hyper‐resolution, [ 6,7 ] optical metasurfaces, [ 8,9 ] high‐heat release, [ 10,11 ] sensing devices, [ 12–14 ] and anti‐counterfeiting tags, [ 15 ] just to name a few. The resonant cavity is usually fabricated by sandwiching a transparent dielectric layer between two partially reflecting mirrors.…”