Regensburg 2016 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 23: Quantum Information Systems
(Joint session of HL, MA, O and TT organized by HL)

TT 23.6: Talk

Tuesday, March 8, 2016, 11:15–11:30, H15

Force sensing via individual nitrogen-vacancy spins in diamond mechanical resonator — Phani Peddibhotla¹, Michael Barson², Kumar Ganesan³, Preeti Ovartchaiyapong⁵, Berndt Koslowski⁴, Ania Jayich⁵, Steven Prawer³, Neil Manson², Marcus Doherty², and •Fedor Jelezko¹ — ¹Institute for Quantum Optics, University of Ulm, 89081 Ulm, Germany — ²Laser Physics Centre, Australian National University, Canberra, Australia — ³School of Physics, University of Melbourne, Victoria 3100, Australia — ⁴Institute for Solid State Physics, University of Ulm, 89081 Ulm, Germany — ⁵Department of Physics University of California, Santa Barbara

We propose to use the embedded nitrogen-vacancy (NV) defect states in single-crystal diamond cantilever for measuring external forces. In order to experimentally demonstrate the force sensing capabilities, we employed an atomic force microscope (AFM) tip to apply a force on the non-clamped end of the diamond cantilever, which in turn induces lattice strain to a NV center close to the clamping point of a cantilever. The strain-mediated coupling between NV spin and diamond mechanics is observable via clear signatures in the optically detected electron spin resonance (ESR) spectrum of the NV center [1, 2].

[1] J. Teissier et al., PRL 113, 020503 (2014). [2] P. Ovartchaiyapong, et al., Nat. Commun. 5:4429 (2014).