Advance lays the groundwork for miniature devices for spectroscopy, communications, and quantum computing. Researchers have created chip-based photonic resonators that operate in the ultraviolet (UV) and visible regions of the spectrum and exhibit a record low UV light loss. The new resonators la
Researchers have developed chip-based photonic resonators with minimal UV light loss, paving the way for advanced UV photonic integrated circuits. These resonators, made from alumina thin films, offer potential in applications like spectroscopic sensing and underwater communication.quantum computingResearchers have created chip-based photonic resonators that operate in the ultraviolet and visible regions of the spectrum and exhibit a record low UV light loss.
Researchers created a chip-based ring resonator that operates in the ultraviolet and visible regions of the spectrum and exhibits a record low UV light loss. The resonator is shown with blue light. Credit: Chengxing He, Yale University “The previous record was accomplished with aluminum nitride, which has a bandgap of ~6eV,” He said. “Compared to single crystal aluminum nitride, amorphous ALD alumina has fewer defects and is less challenging to fabricate, which helped us to achieve lower loss.”
After fabricating ring resonators based on these calculations, the researchers determined their Q factors by measuring the width of resonance peaks while scanning the light frequency injected into the resonator. They found a record-high quality factor of 1.5 × 10at 488.5 nm . Higher Q-factors indicate less light loss.
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