Author:
Agrawal Aman R.,Manley Jack P.,Allepuz-Requena Daniel,Wilson Dalziel J.
Abstract
We have realized a suspended, high-reflectivity focusing metamirror (f = 10 cm, R ≈ 99%), by gradient pitch photonic crystal patterning of a Si3N4 membrane. The design enables construction of stable, ultra-short (L = 30 µm), high-finesse (ℱ > 200) cavities for optomechanical sensing and quantum experiments.