Focusing membrane metamirrors for integrated cavity optomechanics
- URL: http://arxiv.org/abs/2401.16695v2
- Date: Wed, 21 Feb 2024 16:54:33 GMT
- Title: Focusing membrane metamirrors for integrated cavity optomechanics
- Authors: A. R. Agrawal, J. Manley, D. Allepuz-Requena, and D. J. Wilson
- Abstract summary: We have realized a suspended, high-reflectivity focusing metamirror by non-periodic photonic crystal patterning of a Si$_3$N$_4$ membrane.
We present the metamirror design, fabrication process, and characterization of its reflectivity using both free space and cavity-based transmission measurements.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We have realized a suspended, high-reflectivity focusing metamirror
($f\approx 10$ cm, $\mathcal{R} \approx 99\%$) by non-periodic photonic crystal
patterning of a Si$_3$N$_4$ membrane. The design enables construction of a
stable, short ($L$ = 30 $\mu$m), high-finesse ($\mathcal{F}>600$) membrane
cavity optomechanical system using a single plano dielectric end-mirror. We
present the metamirror design, fabrication process, and characterization of its
reflectivity using both free space and cavity-based transmission measurements.
The mirror's effective radius of curvature is inferred from the transverse mode
spectrum of the cavity. In combination with phononic engineering and
metallization, focusing membrane mirrors offer a route towards
high-cooperativity, vertically-integrated cavity optomechanical systems with
applications ranging from precision force sensing to hybrid quantum
transduction.
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