Abstract
Amorphous oxides are prevalent in photonic technologies. They are transparent from the near ultraviolet to the midinfrared and offer a large refractive index contrast with substrates like Si or among themselves, which is exploited to confine light. Stacks of amorphous oxide thin films offer enormous flexibility to engineer their optical response and thus are used to coat laser mirrors, lenses, and other components in complex laser systems. Although interference coating technology is well developed, there are applications that present a challenging environment to the state-of-the-art and which are driving research to advance these photonics structures to new performance heights and functionality.
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