Extended Single-Atom Tweezer Arrays in High-Cooperativity Cavity-QED

A central challenge for cavity-QED-based quantum technologies is to make high-cooperativity optical interfaces compatible with site-resolved arrays of single atoms. Here, we demonstrate optical tweezer arrays of individual ${}^{87}$Rb atoms inside a fiber Fabry-Perot microcavity with single-atom cooperativity $\mathcal{C}\sim 90$. We combine background-free site-resolved fluorescence imaging of extended arrays with collective coupling to a common cavity mode for arrays with a mean atom number up to $\bar{N}\simeq 36$. These results establish a high-cooperativity platform for many-body cavity-QED with site-resolved detection and control.