Cooperatively-enhanced atomic dipole forces in optically trapped nanodiamonds containing NV centres, in liquid

Carlo Bradac; Mathieu L. Juan; Mattias Johnsson; Benjamin Besga; M. van Breugel; B. Baragiola; R. Martin; Gavin Brennen; Gabriel Molina-Terriza; Thomas Volz

doi:10.1117/12.2242963

9 December 2016 Cooperatively-enhanced atomic dipole forces in optically trapped nanodiamonds containing NV centres, in liquid

Carlo Bradac, Mathieu L. Juan, Mattias Johnsson, Benjamin Besga, M. van Breugel, B. Baragiola, R. Martin, Gavin Brennen, Gabriel Molina-Terriza, Thomas Volz

Author Affiliations +

Proceedings Volume 10013, SPIE BioPhotonics Australasia; 1001334 (2016) https://doi.org/10.1117/12.2242963
Event: SPIE BioPhotonics Australasia, 2016, Adelaide, Australia

Abstract

We report on a new regime for optical trapping of diamond nanoparticles in liquid. While holding a nanodiamond (~150 nm) containing many NV centres (~10^3) at the focus of classical optical tweezers, we add a second laser slightly detuned from the dipole transition of the NVs. We measure a change in trap stiffness of ~10%. Remarkably, we show that our results must include collective effects – ‘superradiance’ – between colour centres, which has never been reported before for solid-state systems at room temperature. We discuss how these resonant forces depend on (and can be enhanced by) the type, number, dipole strength and spectral linewidth of the centres.

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Carlo Bradac, Mathieu L. Juan, Mattias Johnsson, Benjamin Besga, M. van Breugel, B. Baragiola, R. Martin, Gavin Brennen, Gabriel Molina-Terriza, and Thomas Volz "Cooperatively-enhanced atomic dipole forces in optically trapped nanodiamonds containing NV centres, in liquid", Proc. SPIE 10013, SPIE BioPhotonics Australasia, 1001334 (9 December 2016); https://doi.org/10.1117/12.2242963

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