Yingqiu Mao

This study addresses the low interchangeability of tapered fiber SERS probes produced through cost-effective chemical synthesis techniques, which complicates quantitative SERS detection. We investigate the impact of nanoparticle spacing variations on the interchangeability of these probes and propose a method to enhance it by optimizing nanoparticle spacing.

Abstract Quantum sensing can provide the superior sensitivity for sensing a physical quantity beyond the shot-noise limit. In practice, however, this technique has been limited to the issues of phase ambiguity and low sensitivity for small-scale probe states. Here, we propose and demonstrate a full-period quantum phase estimation approach by adopting the Kitaev’s phase estimation algorithm to eliminate the phase ambiguity and using the GHZ states to obtain phase value, simultaneously.