Speaker
Dr
Jianming Cai
(Universität Ulm, Germany)
Description
Abstract: The ability to measure weak signals such as
pressure, force, electric field and temperature with
nanoscale devices and high spatial resolution offers a wide
range of applications in fundamental and applied sciences.
Here we present a proposal for a hybrid device composed of
thin film layers of diamond with colour centres and
piezoactive elements for the transduction and
measurement of physical signals. The magnetic response of
a piezomagnetic layer to an external stress or a stress
induced by a signal is shown to affect significantly the spin
properties of nitrogen-vacancy centres in diamond. Under
ambient conditions, realistic environmental noise and
material imperfections, we show that this hybrid device can
achieve significant improvements in sensitivity over the
pure diamond-based approach in combination with
nanometre-scale spatial resolution. Furthermore the
proposed hybrid architecture offers novel possibilities for
engineering strong coherent couplings between
nanomechanical oscillator and solid state spin qubits.
