A tiny chip can now control ultraviolet light ten thousand times more efficiently than the bulky crystals used today.
Ultraviolet light is notoriously difficult to manipulate on a small scale, requiring large and expensive equipment. This new integrated electro-optic modulator is built on a thin film of lithium tantalate. It achieves a massive leap in bandwidth and efficiency while fitting on a standard circuit board. This technology is a necessary step for building portable atomic clocks and high-speed quantum communication links. It moves UV technology out of the lab and into real-world portable devices.
Thin-film lithium tantalate for ultraviolet integrated electro-optic modulator
arXiv · 2605.02758
The realization of integrated, high-speed ultraviolet (UV) modulation is pivotal for the advancement of quantum information processing, portable atomic clocks, and secure solar-blind communications. While mature photonic platforms have facilitated sophisticated system-level integration across visible and infrared spectra, high-speed active modulation in UV remains with traditional bulk crystals. Consequently, a scalable integrated solution that simultaneously combines low insertion loss and extr