Sommaire:

Understanding spin-phonon interactions is essential for solid-state quantum technologies that exploit the spin degree of freedom. In order to probe the resonant coupling of solid-state spin defects to strain fields, we developed a technique to bond thin-film lithium niobate transducers onto arbitrary samples. We then engineer high overtone bulk acoustic wave resonators (HBAR) in crystals hosting spin defects and we probe them at microwave frequencies and 50 mK. Our technique does not require fabrication processes on the target crystal and only requires two parallel polished faces to achieve relatively high quality factors. In CaWO4 crystals doped with Er3+ ions, Y2SiO5 crystals doped with Er3+ ions and in diamond samples, we demonstrate acoustic paramagnetic resonance and we unveil the anisotropy of spin-phonon interactions.

Pour plus d'informations, merci de contacter Jacques V.