Radiation-Pressure-Mediated Control of an Optomechanical Cavity

Cripe, J.; Singh, R.; Yap, M. J.; Cole, Garrett D.; McClelland, D. E.; Corbitt, T. R.; Aggarwal, N.; Lanza, R. K.; Libson, A.; Mavalvala, N.

doi:10.1007/978-3-030-45031-1_4

Cited by 5 publications

(8 citation statements)

References 43 publications

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“…The difference between injecting the light through the macroscopic mirror and microresonator means that the cavity is under-coupled for the transmission measurement in Figure 2a and over-coupled for the reflection measurement in Figure 2b. An additional difference between the two setups is that we are able to simplify the control scheme for locking the cavity in transmission and only require a single feedback loop to an amplitude modulator [25] rather than a second feedback loop that requires a phase modulator.…”

Section: Experiments and Resultsmentioning

confidence: 99%

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Quantum back action cancellation in the audio band

Cripe,

Cullen,

Chen

et al. 2018

Preprint

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We report on the cancellation of quantum back action noise in an optomechanical cavity. We perform two measurements of the displacement of the microresonator, one in reflection of the cavity, and one in transmission of the cavity. We show that measuring the amplitude quadrature of the light in transmission of the optomechanical cavity allows us to cancel the back action noise between 1 kHz and 50 kHz, and obtain a more sensitive measurement of the microresonator's position. To confirm that the back action is eliminated, we measure the noise in the transmission signal as a function of circulating power. By splitting the transmitted light onto two photodetectors and cross correlating the two signals, we remove the contributon from shot noise and measure a quantum noise free thermal noise spectrum. Eliminating the effects of back action in this frequency regime is an important demonstration of a technique that could be used to mitigate the effects of back action in interferometric gravitational wave detectors such as Advanced LIGO.

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Section: Experiments and Resultsmentioning

confidence: 99%

“…where G is the open loop gain for the feedback loop [25]. Then the cross power spectral density between the two photocurrents is…”

Section: Supplementary Materialsmentioning

confidence: 99%

Quantum back action cancellation in the audio band

Cripe,

Cullen,

Chen

et al. 2018

Preprint

Self Cite

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show abstract

“…A Nd:YAG laser beam is used to both stabilize the optomechanical cavity and measure the mechanical motion of the microresonator. The cavity is locked using a feedback loop that utilizes the restoring force produced by a strong optical spring [30]. The details of the optomechanical system can be found in Ref.…”

Section: Design Of New Microresonatorsmentioning

confidence: 99%

“…The details of the optomechanical system can be found in Ref. [30]. Here, we focus on designing a new microresonator and on studying the effect of varying its geometry on the sub-SQL region.…”

Section: Design Of New Microresonatorsmentioning

confidence: 99%

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Design of microresonators to minimize thermal noise below the standard quantum limit

Sharifi

Banadaki

Cullen

et al. 2020

Review of Scientific Instruments

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We present a design for a new microresonator whose geometry is optimized to maximize sub-Standard Quantum Limit (SQL) performance. The new design is predicted to have thermal noise well below the SQL across a broad range of frequencies when operated at 10K. The performance of this designed microresonator will allow it to serve as a test-bed for quantum non-demolition measurements, and to open new regimes of precision measurement that are relevant for many practical sensing applications, including advanced gravitational wave detectors.

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A proposal for optomechanical bichromatic wavelength switching for two-color up-conversion application

Fanid

Rostami

2022

Opt Quant Electron

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This study focuses on the Optomechanical bichromatic wavelength switching system as an indirect two-color up-conversion process that relies on optical force and nanorod scattering effects. This system is used to control light coupling between four parallel optical waveguides made of silicon nitride (Si3N4) which form two identical parts. The parallel waveguides with 0.5 µm × 0.5 µm cross-section and 220 µm lengths suspended on a silica (SiO2) substrate embedded with the array of square silicon (Si) nanorods. By mid-IR plane wave illumination, as control light, with different intensities and different wavelengths on nanorods, scattering would increase and result in an improvement in attractive gradient optical force exerted on waveguides. Via bending waveguides toward each other, caused by optical gradient force, two different visible lights, as probe signals, propagating in the first waveguide of each section would couple to the adjacent waveguide. Simulation results reveal that when the distance between the parallel waveguides in the equilibrium position is 100 nm and the intensity of mid-IR light is 1.28 mW/µm 2 total coupling would occur in two situations: 1-when the control light is 4.5 µm, the probe light with 713 nm wavelength is transmitted to the output, 2-when the control light is 3 µm, the probe light with 609 nm wavelength is transmitted to the output. In the first case 1.92 pN/µm optical force is needed to bend each waveguide by 9 nm and in the second one, 1.28 pN/µm optical force is needed to bend each waveguide by 6 nm for total coupling. The efficiency of the coupled waveguides system is %88.6 for 609 nm probe light injection and %96.5 for 713 nm probe light injection.

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Radiation-Pressure-Mediated Control of an Optomechanical Cavity

Abstract: Radiation-pressure-mediated control of an optomechanical cavity The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters.

Cited by 5 publications

References 43 publications

Quantum back action cancellation in the audio band

Quantum back action cancellation in the audio band

Design of microresonators to minimize thermal noise below the standard quantum limit

A proposal for optomechanical bichromatic wavelength switching for two-color up-conversion application

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