Design of a broadband UV-visible α-barium borate polarizer

Abstract

Until recently, the construction of polarizers for operation below approximately 260 nm were limited to materials such as magnesium fluoride and crystalline quartz. These materials have a much smaller birefringence than calcite, but unlike calcite they have good transmission below 200 nm. These materials are, however, not well suited for Glan-Taylor-type polarizer designs, as they do not produce a large angular separation of the polarized components. A new material, a-barium borate, has recently become available, which transmits to just below 200 nm and has a birefringence that approaches that of calcite. We analyze the performance of various polarizer designs that use this material. Results are presented that compare theory with experimental investigation of a manufactured device.

Introducing a New d0 Sc3+ Asymmetric Ion for Functional Materials: Large Birefringence Enhancement by ScO6 in Ba3Sc2(BO3)4

“…Considering the generally good agreements of calculated birefringence for simple borate crystals as shown in Table 1 and references [47][48][49][50][51][52][53][54][55][56] , the enhanced birefringence of the title compound must come from the distorted ScO 6 octahedral units. It is a consensus that distorted polyhedrons, especially d 0 octahedra, are able to contribute to a large part to birefringence in certain transition metal containing materials, called as SOJT effect, for example TiO 2 [31] , BaTiO 3 [57] and recently reported BaTi(BO 3 ) 2 [32] .…”

Predicting Global Minimum in Complex Beryllium Borate System for Deep-ultraviolet Functional Optical Applications

“…Viable DUV (<200 nm) optical materials play a critical role in optical communication and the laser industry12345, as they possess wide transparency range and high damage threshold678910. Among them, birefringent or nonlinear optical (NLO) materials are utilized in polarization beam splitters, optical isolators, semiconductor photolithography and laser micromachining1112131415.…”

“…Among them, birefringent or nonlinear optical (NLO) materials are utilized in polarization beam splitters, optical isolators, semiconductor photolithography and laser micromachining1112131415. Only a few materials, such as α-BaB 2 O 4 (α-BBO)178 and KBe 2 BO 3 F 2 (KBBF)1617, can be practically used as birefringent or NLO materials in the DUV region. However, both α-BBO and KBBF do not have DUV commercial availability since α-BBO exhibits high UV cutoff edge (189 nm) and KBBF suffers from a strong layering tendency.…”

A study on transmitted intensity of disturbance for air-spaced Glan-type polarizing prisms

“…Polarizing prisms are very important passive devices in optical information processing, laser modulations and laser measurements, etc. Air-spaced Glan-type polarizing prisms are among the most common types of prisms in use today [1][2][3]. They are made out of optical calcite, which exhibits strong birefringence over a wide wavelength range.…”