Scalable Photonic Integrated Circuits for High-Fidelity Light Control

Advances in laser technology have driven discoveries in atomic, molecular, and optical (AMO) physics and emerging applications, from quantum computers with cold atoms or ions, to quantum networks with solid-state color centers. This progress is motivating the development of a new generation of optical control systems that can manipulate the light field with high fidelity at wavelengths relevant for AMO applications. These systems are characterized by criteria: (C1) operation at a design wavelength of choice in the visible (VIS) or near-infrared (IR) spectrum, (C2) a scalable platform that can support large channel counts, (C3) high-intensity modulation extinction and (C4) repeatability compatible with low gate errors, and (C5) fast switching times. Here, we provide a pathway to address these challenges by introducing an atom control architecture based on VIS-IR photonic integrated circuit (PIC) technology. Based on a complementary metal-oxide-semiconductor fabrication process, this atom-control PIC (APIC) technology can meet system requirements (C1)-(C5). As a proof of concept, we demonstrate a 16-channel silicon-nitride-based APIC with (5.8 +/- 0.4) ns response times and >30 dB extinction ratio at a wavelength of 780 nm. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement