Laser cooled atoms have proven transformative for precision metrology, playing a pivotal role in state-of-the-art clocks and interferometers and having the potential to provide a step-change in our modern technological capabilities. To successfully explore their full potential, laser cooling platforms must be translated from the laboratory environment and into portable, compact quantum sensors for deployment in practical applications. This transition requires the amalgamation of a wide range of components and expertise if an unambiguously chip-scale cold atom sensor is to be realized. We present recent developments in cold-atom sensor miniaturization, focusing on key components that enable laser cooling on the chip-scale. The design, fabrication, and impact of the components on sensor scalability and performance will be discussed with an outlook to the next generation of chip-scale cold atom devices.
Laser cooled atoms have proven transformative for precision metrology, playing a pivotal role in state-of-the-art clocks and interferometers and having the potential to provide a step-change in our modern technological capabilities. To successfully explore their full potential, laser cooling platforms must be translated from the laboratory environment and into portable, compact quantum sensors for deployment in practical applications. This transition requires the amalgamation of a wide range of components and expertise if an unambiguously chip-scale cold atom sensor is to be realized. We present recent developments in cold-atom sensor miniaturization, focusing on key components that enable laser cooling on the chip-scale. The design, fabrication, and impact of the components on sensor scalability and performance will be discussed with an outlook to the next generation of chip-scale cold atom devices.
Laser-cooled atoms are a key quantum medium for atomic clocks, precision metrology, and atom interferometers, and they hold strong potential to advance quantum technologies for position, navigation, and timing. Realizing this potential requires moving cold-atom systems beyond laboratory environments. Integrated photonic chips provide a path forward by improving reliability and reducing size, weight, and power consumption, enabling portable and compact quantum sensors for real-world applications. This review surveys recent progress in laser-cooled atomic platforms, with a focus on the key components that enable on-chip integration of cold-atom systems. We discuss on-chip laser stabilization and linewidth-narrowing techniques, enhanced photon–atom coupling at the chip scale, miniaturized high-vacuum chambers, and the integration of on-chip magnetic coils for cold-atom sensing. Together, these developments are critical to the deployment of chip-scale cold-atom devices in both fundamental atomic physics and practical sensing applications. We conclude with an outlook on next-generation integrated cold-atom platforms and their potential impact on quantum technologies.
The miniaturization of cold-atom systems brings high accuracy into portable atomic metrology. However, the impact of cold-atom sensors in real-world applications has been limited by the overall laser cooling package. This study amalgamates a chip-scale optics setup with a microfabricated laser cooling system to dramatically reduce device size, weight, and power usage. The authors use an on-chip Zeeman offset lock for laser cooling, and demonstrate improved atom number afforded by new techniques in silicon cell fabrication. The simplicity, scalability, and utility demonstrated in this cold-atom platform will enable exciting opportunities in portable cold-atom clocks and interferometers.
A fully integrated and mass producible platform for laser cooling has the potential to revolutionize the growing field of quantum technologies and atomic sensors. Recent advancements in the micro-fabrication of components at the heart of cold atom systems have laid the foundations for the amalgamation of a simple, stackable solution to laser cooling. In this talk we will highlight our recent progress towards a fully chip-scale, cold-atom platform, outlining our approach for on-chip wavelength referencing, examining a solution for imaging atoms in a planar stacked device, and finally discussing the limitations to passively pumped vacuum longevity.
A low-cost, mass-producible laser-cooling platform would have a transformative effect in the burgeoning field of quantum technologies and the wider research of atomic sensors. Recent advancements in the micro-fabrication of diffractive optics and vacuum apparatus have paved the way for a simple, stackable solution to the laser cooling of alkali atoms. In this paper we will highlight our recent investigations into a chip-scale, cold-atom platform, outlining our approach for on-chip wavelength referencing, examining a solution for imaging atoms in a planar stacked device, and finally discussing the limitations to passively pumped vacuum longevity. These results will be discussed in the context of an outlined road-map for the production and commercialisation of chip-scale, cold-atom sensors.
Atomic sensors employing cold-atom technology enable unprecedented accuracy and resolution for next generation atomic clocks, magnetometers, gravimeters, and gyroscopes. To date, however, the size and complexity of cold atom systems have prevented their deployment in practical applications outside of large research laboratories. Here we demonstrate a low power, palm-top, and fully integrated cold atom system that functions as an atomic clock with a stability of 2 parts in 10^11 at 1s. This work demonstrates the feasibility of developing compact, robust, and portable devices based on laser cooled atoms.
Laser cooled atomic samples have resulted in profound advances in precision metrology [1], however the technology is typically complex and bulky. In recent publications we described a micro-fabricated optical element, that greatly facilitates miniaturisation of ultra-cold atom technology [2], [3], [4], [5]. Portable devices should be feasible with accuracy vastly exceeding that of equivalent room-temperature technology, with a minimal footprint. These laser cooled samples are ideal for atomic clocks. Here we will discuss the implementation of our micro-fabricated diffractive optics towards building a robust, compact cold atom clock.