A radiophysical method of measuring small mechanical vibrations

Braginskiǐ, V. B.; Manukin, A. B.

doi:10.1007/bf01038575

Cited by 5 publications

(5 citation statements)

References 3 publications

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“…The presence of QOC modifies both mechanical spring constant from K = mω 2 m to K = mω m ωm , as estimated from Eqn. (2b) 1 . Therefore the normalized modified spring constant, which we define as K/K is proportional to ωm /ω m .…”

Section: Linearisation and Steady-state Analysismentioning

confidence: 99%

Squeezing of the mechanical motion and beating 3 dB limit using dispersive optomechanical interactions

Sainadh,

Kumar

2016

Preprint

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We study an optomechanical system consisting of an optical cavity and movable mirror coupled through dispersive linear optomechanical coupling (LOC) and quadratic optomechanical coupling(QOC). We work in the resolved side band limit with a high quality factor mechanical oscillator in a strong coupling regime. We show that the presence of QOC in the conventional optomechanical system (with LOC alone) modifies the mechanical oscillator's frequency and reduces the back-action effects on mechanical oscillator. As a result of this the fluctuations in mechanical oscillator can be suppressed below standard quantum limit thereby squeeze the mechanical motion of resonator. We also show that either of the quadratures can be squeezed depending on the sign of the QOC. With detailed numerical calculations and analytical approximation we show that in such systems, the 3 dB limit can be beaten.

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Section: Linearisation and Steady-state Analysismentioning

confidence: 99%

Squeezing of the mechanical motion and beating 3 dB limit using dispersive optomechanical interactions

Sainadh,

Kumar

2016

Preprint

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“…Questions regarding the foundations of quantum mechanics, the storage and transfer of quantum information and sensitive detector technologies have made quantum optomechanics a field of considerable interest. The field has undergone rapid development over the last decade with the development of new methods for fabricating small bulk mechanical resonators of various forms; nanoscale beams coupled to microwave cavities [1][2][3][4][5][6], photonic-phononic crystals [7][8][9][10][11], toroidal optical micro-resonators [12][13][14][15][16], doubly clamped beams with integrated mirrors and drumhead capacitors in superconducting microwave resonators [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Negative effective mass, optical multistability and Fano line-shape control via mode tunnelling in double cavity optomechanical system

Prakash

Bhattacherjee

2019

Journal of Modern Optics

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We theoretically investigate the optical and mechanical properties of a double cavity optomechanical system with one stationary and two harmonically bound mirrors. We show that it is possible for the mechanical mirrors in this system to posses negative effective mass.Working within the strong coupling and the resolved sideband regime, we show that the displacement of the middle resonator is multistable under certain constrains. We also point to the existence of optomechanically induced absorption (OMIA) and Fano resonance. Owing to the negative effective mass, our scheme can be exploited in the study of quantum optomechanical metamaterials.

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“…At higher mechanical frequencies, direct readout can suffer from feed-through, reducing sensitivity and increasing the noise of the position detection 11 . Optomechanical-style readout is an attractive alternative to direct readout, not only offering improvements in readout noise, but also harnessing decades of progress in the field of quantum optomechanics [12][13][14] .…”

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confidence: 99%