Researchers fabricate chip-based optical resonators with record low UV losses

Phys.org   September 26, 2023 UV and visible photonics enable applications ranging from spectroscopic sensing to communication and quantum information processing. Photonics structures in these wavelength regimes tend to experience higher loss than their IR counterpart. Particularly in the near-UV band, on-chip optical microresonators have not yet achieved a quality factor beyond 1 million. A team of researchers in the US (Yale University, industry) developed ultra-low-loss photonic waveguides and resonators patterned from alumina thin films prepared by a highly scalable atomic layer deposition process. They demonstrated ultra-high Q factor of 1.5×106 at 390 nm, a record value at UV bands, and 1.9×106 […]

New photonics breakthrough

Science Daily  December 13, 2019 An international team of researchers (USA – City College of New York, Russia) has shown that long-range interactions in the metamaterial changes the common behavior of light waves forcing them to localize in space. The study shows that by controlling the degree of such interactions one can switch between trapped and extended (propagating) character of optical waves. The new approach to trap light allows the design of new types of optical resonators, which may have significant impact on antennas in smartphones and Wi-Fi routers, and optical chips in optoelectronics used for transferring data over the […]