公开(公告)号：US20220004080A1

公开(公告)日：2022-01-06

申请号：US17344881

申请日：2021-06-10

申请人： GAMDAN Optics Inc.

发明人： Menelaos K. Poutous ,  Hui Cai ,  Praneeth Gadamsetti

IPC分类号： G02F1/355 ,  C01B35/12

摘要： A non-linear optical crystal, such as a Lithium triborate (LiB3O5 or LBO) crystal, includes a first nanostructured optical surface including distributed pillars and gaps having random heights and cross sections to provide anti-reflection control and scatter control of first light incident on the first structured optical surface. The LBO crystal has an anti-reflective random structured optical surface formed by selective substitution of the surface species Boron-pentoxide (B3O5−) by Lithium Fluoride (LiF), resulting in a depletion layer with low reflectivity and low reflective scatter in the visible, ultraviolet (UV), and near infrared (IR) bands. The LBO crystal with the anti-reflective structured optical surface may be a monolithic structure and thus need not include a coating of an anti-reflective (AR) material, although the LBO crystal may include an optical surface coated by an AR material. The pillars and gaps may be randomly distributed or periodically distributed on the optical surface.