Multimode laser cooling and ultra-high sensitivity force sensing with nanowires

Mahdi Hosseini, Giovanni Guccione, Harry J. Slatyer, Ben C. Buchler and Ping Koy Lam ()
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Mahdi Hosseini: Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University
Giovanni Guccione: Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University
Harry J. Slatyer: Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University
Ben C. Buchler: Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University
Ping Koy Lam: Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Photo-induced forces can be used to manipulate and cool the mechanical motion of oscillators. When the oscillator is used as a force sensor, such as in atomic force microscopy, active feedback is an enticing route to enhance measurement performance. Here we show broadband multimode cooling of −23 dB down to a temperature of 8±1 K in the stationary regime. Through the use of periodic quiescence feedback cooling, we show improved signal-to-noise ratios for the measurement of transient signals. We compare the performance of real feedback to numerical post processing of data and show that both methods produce similar improvements to the signal-to-noise ratio of force measurements. We achieved a room temperature force measurement sensitivity of

Date: 2014
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DOI: 10.1038/ncomms5663

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