Scientists have recently developed a method to fabricate chip-based optical resonators in the UV range that can be used for precise frequency measurements and optical sensing. This breakthrough could be a major step forward in the development of ultra-precise measurements and sensing applications. The new method uses an innovative technique called “laser lithography” to create a tiny, high quality optical resonator on a chip. The chip is made up of a tiny, high-intensity laser beam, which is focused onto a small area of the chip. This laser beam “writes” the optical resonator pattern onto the chip. The chip is then cooled to extremely low temperatures so that the pattern is preserved and the resonator can be used for precise frequency measurements. This new method opens up new possibilities for optical sensing and ultra-precise frequency measurements.

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source: Phys.org