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Resolved Sideband Cooling of a Micromechanical Oscillator
| Content Provider | Semantic Scholar |
|---|---|
| Author | Schliesser, A. Rivière, R. Anetsberger, Georg Arcizet, Olivier Kippenberg, T. J. |
| Copyright Year | 2007 |
| Abstract | Microand nanoscale opto-mechanical systems—based on cantilevers [1, 2], micro-cavities [3, 4] or macroscopic mirrors [5, 6]—provide radiation pressure coupling [7] of optical and mechanical degree of freedom and are actively pursued for their ability to explore quantum mechanical phenomena of macroscopic objects [8, 9]. Many of these investigations require preparation of the mechanical system in or close to its quantum ground state. In the past decades, remarkable progress in ground state cooling has been achieved for trapped ions [10, 11] and atoms confined in optical lattices [12, 13], enabling the preparation of non-classical states of motion [14] and Schrödinger cat states [15]. Imperative to this progress has been the technique of resolved sideband cooling [16, 17, 18], which allows overcoming the inherent temperature limit of Doppler cooling [19] and necessitates a harmonic trapping frequency which exceeds the atomic species’ transition rate. The recent advent of cavity back-action cooling [20] of mechanical oscillators by radiation pressure has followed a similar path with Doppler-type cooling being demonstrated [1, 2, 4, 5, 21], but lacking inherently the ability to attain ground state cooling as recently predicted [22, 23]. Here we demonstrate for the first time resolved sideband cooling of a mechanical oscillator. By pumping the first lower sideband of an optical microcavity [24], whose decay rate is more than twenty times smaller than the eigen-frequency of the associated mechanical oscillator, cooling rates above 1.5 MHz are attained, exceeding the achievable rates in atomic species [10]. Direct spectroscopy of the motional sidebands reveals 40-fold suppression of motional increasing processes, which could enable attaining final phonon occupancies well below unity (< 0.03). Elemental demonstration of resolved sideband cooling as reported here, should find widespread use in opto-mechanical cooling experiments and represents a key step to attain ground state cooling of macroscopic mechanical oscillators [8]. Equally important, this regime allows realization of motion measurement with an accuracy exceeding the standard quantum limit by two mode pumping [25] and could thereby allow preparation of non-classical states of motion. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://k-lab.epfl.ch/wp-content/uploads/2018/09/0709.4036v1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
