Optical levitation of high purity nanodiamonds in vacuum

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Presentation transcript:

Optical levitation of high purity nanodiamonds in vacuum Gavin W Morley, University of Warwick

Acknowledgments Warwick University Angelo Frangeskou Anis Rahman (now UCL) Colin Stephen Guy Stimpson Yashna Lekhai University College London Peter Barker Sougato Bose Imperial College London Myungshik Kim Chuanqi Wan Cardiff University Laia Gines, Soumen Mandal, Oliver Williams

Outline Why diamond? Our results - Optically trapped diamonds heat up to destruction at 5 mbar - Pure nanodiamonds don’t heat up at 4 mbar

Nitrogen vacancy (NV-) centres in diamond 1. Introduction: why diamond? Nitrogen vacancy (NV-) centres in diamond Nitrogen Vacancy 637 nm Review: MW Doherty et al, Phys Rep 528, 1 (2013)

Nitrogen-vacancy centres without levitation 1. Introduction: why diamond? Nitrogen-vacancy centres without levitation

Nitrogen-vacancy (NV-) 1. Introduction: why diamond? Nitrogen-vacancy (NV-) Green excitation  Spin polarization  Spin readout

Levitating nanodiamonds in air 1. Introduction: why diamond? Levitating nanodiamonds in air - Berlin: atmospheric pressure, A Kuhlicke, AW Schell, J Zoll & O Benson, APL 105, 073101 (2014) - Paris: 10-2 mbar, T Delord, L Nicolas, L Schwab & G Hétet, NJP 19, 033031 (2017) + others ICFO, Barcelona: 0.5 mbar, G P Conangla, A W Schell, R A Rica & R Quidant, arXiv:1803.05527 - University College London: Peter Barker‘s group - Pittsburgh: 6.7 x 10-3 mbar, J-F Hsu, P Ji, CW Lewandowski & B D’Urso, Sci Rep 6, 30125 (2016) - Rochester: 1064 nm, >5 mbar, LP Neukirch, E von Haartman, JM Rosenholm & AN Vamivakas, Nat Photon 9, 653 (2015) + others - Purdue: 1550 nm, >10 mbar TM Hoang, J Ahn, J Bang & T Li, Nat Comms 7, 12250 (2016) + others Ion traps Magneto-gravitational trap Optical traps

drop a nanodiamond containing a spin 1. Introduction: why diamond? 2. Our work Our proposal: drop a nanodiamond containing a spin From our collaboration: - M Scala et al., PRL 111, 180403 (2013) - C Wan et al., PRA 93, 043852 (2016) - C Wan et al., PRL 117, 143003 (2016) - S Bose et al., PRL 119, 240401 (2017) From other groups: - Z-q Yin, T Li, X Zhang & LM Duan, PRA 88, 033614 (2013)

drop a nanodiamond containing a spin 1. Introduction: why diamond? 2. Our work Our proposal: drop a nanodiamond containing a spin From our collaboration: - M Scala et al., PRL 111, 180403 (2013) - C Wan et al., PRA 93, 043852 (2016) - C Wan et al., PRL 117, 143003 (2016) - S Bose et al., PRL 119, 240401 (2017)

drop a nanodiamond containing a spin 1. Introduction: why diamond? 2. Our work Our proposal: drop a nanodiamond containing a spin From our collaboration: - M Scala et al., PRL 111, 180403 (2013) - C Wan et al., PRA 93, 043852 (2016) - C Wan et al., PRL 117, 143003 (2016) - S Bose et al., PRL 119, 240401 (2017)

drop a nanodiamond containing a spin 1. Introduction: why diamond? 2. Our work Our proposal: drop a nanodiamond containing a spin From our collaboration: - M Scala et al., PRL 111, 180403 (2013) - C Wan et al., PRA 93, 043852 (2016) - C Wan et al., PRL 117, 143003 (2016) - S Bose et al., PRL 119, 240401 (2017)

drop a nanodiamond containing a spin 1. Introduction: why diamond? 2. Our work Our proposal: drop a nanodiamond containing a spin From our collaboration: - M Scala et al., PRL 111, 180403 (2013) - C Wan et al., PRA 93, 043852 (2016) - C Wan et al., PRL 117, 143003 (2016) - S Bose et al., PRL 119, 240401 (2017)

drop a nanodiamond containing a spin 1. Introduction: why diamond? 2. Our work Our proposal: drop a nanodiamond containing a spin From our collaboration: - M Scala et al., PRL 111, 180403 (2013) - C Wan et al., PRA 93, 043852 (2016) - C Wan et al., PRL 117, 143003 (2016) - S Bose et al., PRL 119, 240401 (2017)

drop a nanodiamond containing a spin 1. Introduction: why diamond? 2. Our work Our proposal: drop a nanodiamond containing a spin From our collaboration: - M Scala et al., PRL 111, 180403 (2013) - C Wan et al., PRA 93, 043852 (2016) - C Wan et al., PRL 117, 143003 (2016) - S Bose et al., PRL 119, 240401 (2017)

Spatial superposition needs high vacuum 1. Introduction: why diamond? 2. Our work Spatial superposition needs high vacuum

1. Introduction: why diamond? 2. Our work Our levitating nanodiamonds: optical trap with 40 nm diamonds and 1064 nm

Analytical model for interferometric balanced detection 1. Introduction: why diamond? 2. Our work Analytical model for interferometric balanced detection ATM Anishur Rahman, AC Frangeskou, PF Barker & GW Morley, Review of Scientific Instruments 89, 023109 (2018)

Analytical model for interferometric balanced detection 1. Introduction: why diamond? 2. Our work Analytical model for interferometric balanced detection ATM Anishur Rahman, AC Frangeskou, PF Barker & GW Morley, Review of Scientific Instruments 89, 023109 (2018)

Background: Brownian thermometry J Millen, T Deesuwan, P Barker & J Anders, Nature Nanotechnology 9, 425 (2014) ATM Anishur Rahman, AC Frangeskou, PF Barker & GW Morley, Review of Scientific Instruments 89, 023109 (2018)

Levitating nanodiamonds overheating 1. Introduction: why diamond? 2. Our work Levitating nanodiamonds overheating 20 mbar ATMA Rahman et al., Scientific Reports 6, 21633 (2016)

A solution: more pure diamonds 1. Introduction: why diamond? 2. Our work A solution: more pure diamonds 150 ppm nitrogen 120 ppb nitrogen impurities impurities AC Frangeskou, ATMA Rahman, L Gines, S Mandal, OA Williams, PF Barker & GW Morley, New Journal of Physics 20, 043016 (2018)

A solution: more pure nanodiamonds 1. Introduction: why diamond? 2. Our work A solution: more pure nanodiamonds 150 ppm nitrogen 120 ppb nitrogen impurities Milling by Ollie Williams’ group, Cardiff AC Frangeskou, ATMA Rahman, L Gines, S Mandal, OA Williams, PF Barker & GW Morley, New Journal of Physics 20, 043016 (2018)

A solution: more pure nanodiamonds 1. Introduction: why diamond? 2. Our work A solution: more pure nanodiamonds 4 mbar AC Frangeskou, ATMA Rahman, L Gines, S Mandal, OA Williams, PF Barker & GW Morley, New Journal of Physics 20, 043016 (2018)

Conclusion: Purer diamonds don’t heat up at 4 mbar AC Frangeskou, ATMA Rahman, L Gines, S Mandal, OA Williams, PF Barker & GW Morley, New Journal of Physics 20, 043016 (2018)

Conclusion: Outlook: Purer diamonds don’t heat up at 4 mbar AC Frangeskou, ATMA Rahman, L Gines, S Mandal, OA Williams, PF Barker & GW Morley, New Journal of Physics 20, 043016 (2018)

Outlook: