Free-space cavity optomechanics in a cryogenic environment

Kuhn, A.; Teissier, Jean; Neuhaus, L.; Zerkani, Salim; Brackel, E. V.; Deléglise, S.; Briant, T.; Cohadon, P.-F.; Heidmann, A.; Michel, C.; Pinard, L.; Dolique, V.; Flaminio, R.; Taibi, R.; Chartier, C.; Traon, O. Le

doi:10.1063/1.4863666

Cited by 18 publications

(12 citation statements)

References 15 publications

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“…However the typical operating frequency of membrane resonators is of the order of several hundred kHz, and it is not easy to reduce the frequency without losing the beneficial effects of the internal stress on the quality factor. At present, our devices are among the best of those designed for the observation of quantum effects at relatively low frequencies [20,21]. …”

Section: Discussionmentioning

confidence: 99%

Fabrication and characterization of low loss MOMS resonators for cavity opto-mechanics

Serra

Bonaldi

Borrielli

et al. 2015

Microelectronic Engineering

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Section: Discussionmentioning

confidence: 99%

Fabrication and characterization of low loss MOMS resonators for cavity opto-mechanics

Serra

Bonaldi

Borrielli

et al. 2015

Microelectronic Engineering

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“…[20]). Optical access to the device is provided by fused silica windows that filter roomtemperature thermal radiation to avoid heating of the cryostat base plate [36], and the cryostat reaches a base temperature of T bp = 40 mK. A back port enables cavity transmission measurements for beam alignment and membrane imaging.…”

Section: Discussionmentioning

confidence: 99%

Optomechanical ground-state cooling in a continuous and efficient electro-optic transducer

Brubaker¹,

Kindem²,

Urmey³

et al. 2021

Preprint

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The demonstration of a quantum link between microwave and optical frequencies would be an important step towards the realization of a quantum network of superconducting processors. A major impediment to quantum electro-optic transduction in all platforms explored to date is noise added by thermal occupation of modes involved in the transduction process, and it has proved difficult to realize low thermal occupancy concurrently with other desirable features like high duty cycle and high efficiency. In this work, we present an efficient and continuously operating electro-optomechanical transducer whose mechanical mode has been optically sideband-cooled to its quantum ground state. The transducer achieves a maximum efficiency of 47% and minimum input-referred added noise of 3.2 photons in upconversion. Moreover, the thermal occupancy of the transducer's microwave mode is minimally affected by continuous laser illumination with power more than two orders of magnitude greater than that required for optomechanical ground-state cooling.

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“…Similar efforts are currently underway in other laboratories, where high quality factor mg‐scale mechanical resonators have recently been demonstrated at room temperature and μg‐scale mechanical resonators have been embedded in a high finesse cavity inside a dilution fridge environment .…”

mentioning

confidence: 90%

Dynamical back‐action effects in low loss optomechanical oscillators

et al. 2014

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The problem of the stability of a cavity optomechanical system based on an oscillator having at the same time low optical and mechanical losses is addressed. As it is the aim to extend the use of optical squeezing as a tool for improving quantum limited displacement sensing at low frequency, a family of opto-mechanical devices designed to work at frequencies of about 100 kHz was developed . The devices actually meet the initial design goals, but new requirements have emerged from the analysis of their behavior in optical cavities, due to the interaction between the cavity locking system and the low order normal modes of the devices.The optomechanics field of research has been gathering a lot of momentum during the last couple of years, driven by the achievement of long-awaited experimental results. For example, micro-and nano-oscillators can now be cooled down to an occupation number below unity, or very close to it, opening up the possibility to observe quantum phenomena [1][2][3][4][5][6].We are particularly interested in optical squeezing as a tool for improving quantum limited displacement sensing [7] in the audio-band, in particular for improving the sensitivity of gravitational wave interferometers [8]. Experiments have recently achieved squeezing around the mechanical resonance in the MHz range, using a silicon nanomechanical resonator [9], and a thin semi-transparent membrane within a Fabry-Pérot cavity [10]. At lower frequencies however, various sources of technical noise, such as thermal noise, phase/frequency noise associated with the input field and/or the slow cavity fluctuations, have detrimental effects on the manifestation of quantum phenomena, making lowfrequency ponderomotive squeezing much more difficult to achieve. As a first step, we are addressing these problems by developing a family of opto-mechanical devices specifically designed to ease the detection of pondero-motive squeezing (or, more generally, to produce a cavity quantum optomechanical system) at frequencies of about 100 kHz.Our approach is focused on relatively thick silicon oscillators with high reflectivity coating [11]. The relatively high mass (about 100 μg) of our devices is compensated by the capability to manage high power at low temperatures (down to 1 K), owing to a favorable geometric factor (thick connectors) and the excellent thermal conductivity of silicon crystals at cryogenic temperature. We point out that most of the schemes designed to detect quantum properties of light cannot take advantage from laser cooling of the mechanical oscillator involved in the measurement. Therefore, a low thermal noise background is required (i.e., low temperature), together with a weak interaction between the oscillator and its thermal bath (i.e., high mechanical quality factors Q).In such devices, the mirror coatings must provide high reflectivity and low losses, as radiation-pressure

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Free-space cavity optomechanics in a cryogenic environment

Cited by 18 publications

References 15 publications

Fabrication and characterization of low loss MOMS resonators for cavity opto-mechanics

Fabrication and characterization of low loss MOMS resonators for cavity opto-mechanics

Optomechanical ground-state cooling in a continuous and efficient electro-optic transducer

Dynamical back‐action effects in low loss optomechanical oscillators

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