From membrane‐in‐the‐middle to mirror‐in‐the‐middle with a high‐reflectivity sub‐wavelength grating

Stambaugh, Corey; Xu, Haitan; Kemiktarak, Utku; Taylor, Jacob M.; Lawall, John

doi:10.1002/andp.201400142

Cited by 29 publications

(43 citation statements)

References 43 publications

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“…The central mirror on the tethered membranes is a 2D photonic crystal device, that is designed using finite difference time domain (FDTD) simulations. They are similar to previous designs of grating reflectors [37] and photonic crystals (PhC) [38,39], which usually consist of an array of either lines or holes etched into the dielectric, respectively. Such a periodic change in the refractive index allows for a band gap to be tailored for a specific wavelength, resulting in (simulated) reflectivities > 99.9%.…”

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confidence: 84%

Mechanical Resonators for Quantum Optomechanics Experiments at Room Temperature

2016

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All quantum optomechanics experiments to date operate at cryogenic temperatures, imposing severe technical challenges and fundamental constraints. Here we present a novel design of onchip mechanical resonators which exhibit fundamental modes with frequencies f and mechanical quality factors Qm sufficient to enter the optomechanical quantum regime at room temperature. We overcome previous limitations by designing ultrathin, high-stress silicon nitride (Si3N4) membranes, with tensile stress in the resonators' clamps close to the ultimate yield strength of the material. By patterning a photonic crystal on the SiN membranes, we observe reflectivities greater than 99%. These on-chip resonators have remarkably low mechanical dissipation, with Qm∼10 8 , while at the same time exhibiting large reflectivities. This makes them a unique platform for experiments towards the observation of massive quantum behavior at room temperature.

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confidence: 84%

Mechanical Resonators for Quantum Optomechanics Experiments at Room Temperature

2016

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“…The reflectivities of simple "slab" membranes are limited by the refractive index of the material. Designing membranes with photonic crystal structures [17] or sub-wavelength gratings [18] can result in reflectivities very close to unity. The additions of such structures complicate the field profile within the membranes, making a first-principles calculation of the absorption, as was done for the simple membrane in Sec.…”

Section: E Beyond Simple Membranesmentioning

confidence: 99%

Optimal optomechanical coupling strength in multimembrane systems

et al. 2020

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We calculate the optomechanical coupling strength for a multi-membrane in a cavity system. The optimal configuration for an array of N membranes placed near the center of a cavity is identified. This results in a coupling strength much greater than previously proposed multi-membrane configurations. We find that the coupling strength scales exponentially with the number of membranes until saturating due to complete localization of the field within the array. Furthermore we explore two sources of loss, those due to light absorption within the membrane(s) and leakage through the cavity's end-mirrors, and evaluate how they affect the possibility of achieving strong coupling.

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“…Additionally, for low-transmission (t m ) membranes (e.g., Refs. [6,43,47]), the strong quadratic dispersive and linear dissipative coupling parameters can both be enhanced by a factor ∼ 1/|t m |.…”

Section: Appendices a Membrane In Cavity: Scattering Model In 1dmentioning

confidence: 99%

Flexure-tuned membrane-at-the-edge optomechanical system

et al. 2019

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We introduce and characterize a flexure-tuned optomechanical system in which a membrane is positioned microns from one end mirror of a Fabry-Perot optical cavity. By gently flexing the membrane's silicon frame (to 80 m radius of curvature (ROC)), we access the full range of optomechanical couplings predicted by a 1D scattering model; by more aggressively flexing (to 3 m ROC) we demonstrate >15 µm membrane travel, ∼ milliradian tilt tuning, and a wavelength-scale (1.64±0.78 µm) mirror-membrane separation. This passively-aligned, monolithic geometry will greatly simplify the tasks of mechanical and laser stabilization, and provides a platform for realizing flexure-tuned, wavelength-scale "membranein-the-middle" (MIM) systems and wavelength-scale two-membrane cavities for nested optomechanical systems. Finally, we provide analytical expressions for the leading-order optomechanical couplings, finding that this system can generate linear dissipative and quadratic dispersive strong coupling parameters that are orders of magnitude larger than is possible with a MIM geometry. Additionally, this system can achieve purely quadratic dispersive coupling with suppressed linear dissipative back-action, thereby reducing unwanted force noise and alleviating the requirement of single-photon strong coupling for resolving a membrane's phonon number states. * vincent.

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From membrane‐in‐the‐middle to mirror‐in‐the‐middle with a high‐reflectivity sub‐wavelength grating

Cited by 29 publications

References 43 publications

Mechanical Resonators for Quantum Optomechanics Experiments at Room Temperature

Mechanical Resonators for Quantum Optomechanics Experiments at Room Temperature

Optimal optomechanical coupling strength in multimembrane systems

Flexure-tuned membrane-at-the-edge optomechanical system

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