In a milestone breakthrough for materials science, a research team from the Xinjiang Institute of Physical and Chemical Technology, under the Chinese Academy of Sciences, has designed a new fluorinated borate crystal structure with a minimum phase-matching frequency-doubling wavelength of just 145.2 nanometers.
This achievement marks the first time a material has successfully surpassed the critical 148.3 nm threshold required for the development of the “229Th nuclear clock.” Led by Professors Pan Shilie and Yang Zhihua, the team utilized a fluorination regulation design principle to simultaneously optimize three traditionally conflicting core properties: ultra-wide bandgap, short phase-matching wavelength, and high frequency-doubling effects. The findings were recently published in the international academic journal Advanced Materials.
This advancement in fundamental materials science carries profound strategic implications for military technology, particularly for next-generation Positioning, Navigation, and Timing (PNT) systems. Current global satellite navigation systems, such as the U.S. Global Positioning System (GPS) and China’s BeiDou, rely on high-performance atomic clocks to provide the precise time synchronization necessary for long-range precision strikes and coordinated operations in complex electromagnetic environments.
However, the precision of atomic clocks is limited by their physical mechanisms. The “nuclear clock,” driven by deep-ultraviolet lasers, is considered the ultimate goal of timekeeping technology. By crossing the 148.3 nm threshold, China has secured a lead in the race to develop a clock that is significantly smaller and several orders of magnitude more accurate than existing atomic standards.
In military applications, the extreme precision of a nuclear clock would directly bolster the independent operational capabilities of the BeiDou Navigation Satellite System. Enhanced timing accuracy reduces the “drift” in inertial navigation systems, allowing long-range weapons to maintain high strike accuracy even when external satellite signals are jammed or unavailable. Furthermore, deep-ultraviolet laser technology is a core component of high-resolution reconnaissance, underwater communication, and quantum-encrypted links. The introduction of this crystal could render current stealth technologies and electronic interference less effective against more precise, higher-frequency detection beams.
As major powers accelerate their competition for digital sovereignty and algorithmic dominance, breakthroughs in underlying physical materials are becoming the key variables defining future warfare. If China is the first to integrate these high-performance crystals into the ground stations or next-generation satellites of the BeiDou system, its PNT global competitiveness could achieve a generational leap over GPS, providing Beijing with a more robust temporal and spatial yardstick in the theater of global military competition.
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