Spin detection with a micromechanical trampoline: Towards magnetic resonance microscopy harnessing cavity optomechanics
| Autor: | Dylan P. McNally, Thomas R. Knief, Gabriel G. T. Assumpcao, Yiheng Lin, Ran Fischer, Chris Reetz, Cindy Regal |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics::Instrumentation and Detectors
General Physics and Astronomy Magnetic resonance force microscopy FOS: Physical sciences Physics::Optics 01 natural sciences 7. Clean energy 010305 fluids & plasmas law.invention chemistry.chemical_compound Resonator law 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Electron paramagnetic resonance Spin (physics) Optomechanics Physics Spins Condensed Matter - Mesoscale and Nanoscale Physics Magnetic resonance microscopy business.industry 3. Good health Silicon nitride chemistry Optoelectronics business |
| Popis: | We explore the prospects and benefits of combining the techniques of cavity optomechanics with efforts to image spins using magnetic resonance force microscopy (MRFM). In particular, we focus on a common mechanical resonator used in cavity optomechanics -- high-stress stoichiometric silicon nitride (Si$_3$N$_4$) membranes. We present experimental work with a trampoline membrane resonator that has a quality factor above $10^6$ and an order of magnitude lower mass than a comparable standard membrane resonators. Such high-stress resonators are on a trajectory to reach 0.1 $\rm{aN}/\sqrt{\rm{Hz}}$ force sensitivities at MHz frequencies by using techniques such as soft clamping and phononic-crystal control of acoustic radiation in combination with cryogenic cooling. We present a demonstration of force-detected electron spin resonance of an ensemble at room temperature using the trampoline resonators functionalized with a magnetic grain. We discuss prospects for combining such a resonator with an integrated Fabry-Perot cavity readout at cryogenic temperatures, and provide ideas for future impacts of membrane cavity optomechanical devices on MRFM of nuclear spins. 19 pages, 8 figures, 3 tables |
| Databáze: | OpenAIRE |
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