Optomechanical SiN nano-oscillators in high-finesse Fabry-Perot cavities can be used to investigate the interaction between mechanical and optical degree of freedom for ultra-sensitive metrology and fundamental quantum mechanical studies. In this work we present a nano-oscillator made of a high-stress round-shaped SiN membrane with an integrated on-chip 3D seismic filter properly designed to reduce mechanical losses. This oscillator works in the 200 kHz - 5 MHz range and features a mechanical quality factor of Q≃107 and a Q-frequency product in excess of 6.2×1012 Hz at room temperature, fulfilling the minimum requirement for quantum ground-state cooling of the oscillator in an optomechanical cavity. The device is obtained by MEMS DRIE bulk micromachining with a two-side silicon processing on a Silicon-On-Insulator (SOI) wafer. The microfabrication process is quite flexible and additional layers could be deposited over the SiN membrane before the DRIE steps, if required for a sensing application. Therefore, such oscillator is a promising candidate for quantum sensing applications in the context of the emerging field of Quantum Technologies.
@article{arxiv.1806.11513,
title = {Silicon Nitride MOMS Oscillator for Room Temperature Quantum Optomechanics},
author = {Enrico Serra and Bruno Morana and Antonio Borrielli and Francesco Marin and Gregory Pandraud and Antonio Pontin and Giovanni Andrea Prodi and Pasqualina M. Sarro and Michele Bonaldi},
journal= {arXiv preprint arXiv:1806.11513},
year = {2018}
}