A research team hailing from the University of Colorado Boulder in the United States has unveiled a high-performance optical microresonator with a “race-track” design. Their groundbreaking findings have been published in the esteemed journal, Applied Physics Letters. This resonator boasts the ability to “trap light,” facilitating specialized optical operations. The team is dedicated to optimizing its performance to function efficiently even at low optical power levels. By incorporating the design principles of the “Euler curve,” they have successfully minimized optical loss. The device was meticulously crafted in a cleanroom environment using cutting-edge electron beam lithography technology. Additionally, the team selected chalcogenide semiconductor glass materials, ultimately fabricating an ultra-low-loss device. Looking ahead, this innovative microresonator holds the promise of becoming a pivotal component in photonic systems, paving the way for the development of scalable optical chips.