Optical properties of some crystalline fluorides in the terahertz region of the spectrum

The transmission in the terahertz spectral range of crystalline fluorides of Lithium (LiF), Calcium (CaF2), Barium (BaF2) and Magnesium (MgF2), which are widely used in ultraviolet and infrared spectral optics, was studied. The spectral dependences of the absorption coefficient of these materials we...

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Bibliographic Details
Published in:Optical materials 2021-05, Vol.115, p.111019, Article 111019
Main Authors: Kaplunov, Ivan A., Kropotov, Grigory I., Rogalin, Vladimir E., Shakhmin, Alexey A.
Format: Article
Language:English
Subjects:
Absorption
Fluorides
Refractive index
Single crystal
Spectrophotometer
Terahertz range (THz)
Transmission
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Summary:The transmission in the terahertz spectral range of crystalline fluorides of Lithium (LiF), Calcium (CaF2), Barium (BaF2) and Magnesium (MgF2), which are widely used in ultraviolet and infrared spectral optics, was studied. The spectral dependences of the absorption coefficient of these materials were obtained, in the region of 200–3000 μm a transparency zone was registered. This is of interest for the possible use of fluorides in THz devices in the millimeter range. •The optical properties of LiF, CaF2, BaF2, and MgF2 single crystals in the THz region (300 - 3000 µm) have been studied.•These single crystals are commercially available.•They can be used in millimeter wave devices.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2021.111019