Optomechanical trampoline resonators

Kleckner, Dustin; Pepper, Brian; Jeffrey, E.; Sonin, Petro; Thon, Susanna M.; Bouwmeester, Dirk

doi:10.1364/oe.19.019708

Cited by 80 publications

(71 citation statements)

References 32 publications

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“…Focusing our interest to FabryPerot interferometers with oscillating mirrors, we mention that very low mass oscillators have recently been conceived and tested, based on free-standing dielectric multi-layer reflectors [3,35,36], or on tiny mirrors on shaped thin membranes [6,7,37,38].…”

Section: Introductionmentioning

confidence: 99%

Inhomogeneous mechanical losses in micro-oscillators with high reflectivity coating

Serra

Cataliotti

Marín

et al. 2012

Journal of Applied Physics

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We characterize the mechanical quality factor of micro-oscillators covered by a highly reflective coating. We test an approach to the reduction of mechanical losses, that consists in limiting the size of the coated area to reduce the strain and the consequent energy loss in this highly dissipative component. Moreover, a mechanical isolation stage is incorporated in the device. The results are discussed on the basis of an analysis of homogeneous and non-homogeneous losses in the device and validated by a set of Finite-Element models. The contributions of thermoelastic dissipation and coating losses are separated and the measured quality factors are found in agreement with the calculated values, while the absence of unmodeled losses confirms that the isolation element integrated in the device efficiently uncouples the dynamics of the mirror from the support system. Also the resonant frequencies evaluated by Finite-Element models are in good agreement with the experimental data, and allow the estimation of the Young modulus of the coating. The models that we have developed and validated are important for the design of oscillating micro-mirrors with high quality factor and, consequently, low thermal noise. Such devices are useful in general for high sensitivity sensors, and in particular for experiments of quantum opto-mechanics.

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Section: Introductionmentioning

confidence: 99%

Inhomogeneous mechanical losses in micro-oscillators with high reflectivity coating

Serra

Cataliotti

Marín

et al. 2012

Journal of Applied Physics

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“…An additional challenge is to operate at mechanical frequencies beyond 10 5 Hz, where commercial lasers exhibit a minimal amount of classical noise and can relatively easily be quantum limited to shot noise in order to avoid heating or decoherence of the mechanics through noise [23]. Another difficulty for realistic quantum optomechanics experiments at room temperature is that often good mechanical quality is mutually exclusive with good optical reflectivity [24][25][26]. This limits the achievable coupling rates and increases the necessary optical power to a level where absorption potentially becomes a practical limitation for cooling and quantum experiments.…”

mentioning

confidence: 99%

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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“…As for optical microsystems, several groups have indeed explored designs of micromirrors oscillating in the range of frequencies we are considering [37][38][39][40]. In all cases, it is evident that it is very difficult to satisfy, at the same time, all the technological requirements necessary for the observation of quantum effects.…”

Section: Design Rationalementioning

confidence: 99%

Low-Loss Optomechanical Oscillator for Quantum-Optics Experiments

et al. 2015

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We present an oscillating micromirror with mechanical quality factors Q up to 1.2 × 10 6 at cryogenic temperature and optical losses lower than 20 ppm. The device is specifically designed to ease the detection of ponderomotive squeezing (or, more generally, to produce a cavity quantum optomechanical system) at frequencies of about 100 kHz. The design allows one to keep under control both the structural loss in the optical coating and the mechanical energy leakage through the support. The comparison between devices with different shapes shows that the residual mechanical loss at 4.2 K is equally contributed by the intrinsic loss of the silicon substrate and of the coating, while at higher temperatures the dominant loss mechanism is thermoelasticity in the substrate. As the modal response of the device is tailored for its use in optical cavities, these features make the device very promising for quantum-optics experiments.

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Optomechanical trampoline resonators

Cited by 80 publications

References 32 publications

Inhomogeneous mechanical losses in micro-oscillators with high reflectivity coating

Inhomogeneous mechanical losses in micro-oscillators with high reflectivity coating

Mechanical Resonators for Quantum Optomechanics Experiments at Room Temperature

Low-Loss Optomechanical Oscillator for Quantum-Optics Experiments

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