Optical materials for ultraviolet applications

Compact and efficient tunable solid state UV sources are highly desirable for a variety of optoelectronic and medical applications. During the past decade single crystals with certain types of boron-oxygen anionic groups have been identified as providing excellent short wavelength transmission and nonlinear properties which allows them to efficiently convert longer wavelength laser light to the UV and vacuum UV regions. In this review the properties, crystal growth methods, defect issues and device applications for the most important of these materials are discussed.

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