LiCaAlF6 (Lithium calcium aluminum fluoride, LiCAF) N2 (Nitrogen) Secure .gov websites use HTTPS TeO2 (Tellurium dioxide) CaF2 (Calcium fluoride) Ge (Germanium) Shelf The amount of the change depends on the intensity and duration of the exposure as well as the photosensitivity of the fiber. Having the highest refractive index (n ~ 4.0) of any of the infrared bulk transmitting substrate materials and low dispersion properties across a wide range of temperatures avoids chromatic aberration in many applications. Sr (Strontium) Li 1980: n 1.9-18 µm; 200 K ZnS (Zinc sulfide) K (Potassium) Hf (Hafnium) To download this data or our MSDS safety data sheet as a pdf, please click on the links at the top of the page. LiIO3 (Lithium iodate) Zr (Zirconium), Page Li 1980: n 1.9-18 µm; 400 K MgO (Magnesium monoxide) and extinction coefficient The germanium-doped fiber is photosensitive, which means that the refractive index of the core changes with exposure to UV light. Ta (Tantalum) NaF (Sodium fluoride) BiB3O6 (Bismuth triborate, BiBO) Ciesielski et al. LiB3O5 (Lithium triborate, LBO) 47, 244-246 (1957) Export Citation BibTex AgGaSe2 (Silver gallium selenide, AGSe) Os (Osmium) Bi12SiO20 (Bismuth silicate, BSO) Ciesielski et al. Mn (Manganese) Y3Al5O12 (Yttrium aluminium garnet, YAG) KNbO3 (Potassium niobate) Ho (Holmium) SF6 (Sulphur hexafluoride) CaCO3 (Calcium carbonate, Calcite) Due to the low transmission and the high index of refraction of Germanium as an uncoated MgH2 (Magnesium hydride) For a typical sample of Ge the refractive index ThF4 (Thorium tetrafluoride) Pr (Praseodymium) (24 Hr. CuGaS2 (Copper gallium sulfide) RbCl (Rubidium chloride) CsI (Cesium iodide) However, you MoS2 (Molybdenum disulfide) PbMoO4 (Lead Molybdate) BP (Boron phosphide) SF6 (Sulphur hexafluoride) H2 (Hydrogen) HfO2 (Hafnium dioxide, Hafnia) CuGaS2 (Copper gallium sulfide) can change your cookie settings at any time. In (Indium) Amotchkina et al, 2020: 0.42 µm film; n,k 0.4-15 µm, Crysal orientation: <111>; Doping: 2.5×1014 cm-3, n; Room temperature, D.E. LaF3 (Lanthanum fluoride) Thornton conducted experiments on low resistivity (0.85-3.8Ωcm) germanium between 7-20µm across the 70-150°C range of temperatures. If you continue without changing your settings, we'll assume Be (Beryllium) Cu (Copper) that you are happy to receive all cookies on this website. LuAl3(BO3)4 (Lutetium aluminium borate, LuAB) Hg (Mercury) Li 1980: n 1.9-18 µm; 100 K [Full database record], RefractiveIndex.INFO website: © 2008-2020 Mikhail Polyanskiy, refractiveindex.info database: public domain via CC0 1.0, NO GUARANTEE OF ACCURACY - Use on your own risk, Germanium - Infrared Multilayer Laboratory, University of Reading. 3D - selected data for 3D artists, Book HgS (Mercury sulfide) KI (Potassium iodide) CaMoO4 (Calcium molybdate) Ciesielski et al. 5.47661 and 0.7842102. Fe3O4 (Iron(II,III) oxide, Magnetite) BaB2O4 (Barium borate, BBO) YVO4 (Yttrium orthovanadate) PbS (Lead sulfide) NaBr (Sodium bromide) Germanium is grown using the Czochralski technique by a small number of manufacturers in Belgium, USA, China and Russia. Icenogle et al. AlSb (Aluminium antimonide) Yb (Ytterbium) It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Lu (Lutetium) BP (Boron phosphide) WS2 (Tungsten disulfide) Li 1980: n 1.9-18 µm; 293 K InAs (Indium arsenide) Bi (Bismuth) CuO (Copper monoxide) Accurate dispersive refractive index data has been extensively investigated over a number of years. ZnO (Zinc monoxide) Refractive index database [about] Shelf. Cs (Caesium) Tl3AsSe3 (Thallium arsenic selenide, TAS) N2 (Nitrogen) Ref. Burnett et al. Rh (Rhodium) CdGeP2 (Cadmium germanium phosphide) Germanium covers the whole of the 8-14 micron thermal band and is used in lens systems for thermal imaging. With its very high refractive index, Anti-Reflective (AR) coating is recommended. Yb (Ytterbium) MAIN - simple inorganic materials ORGANIC - organic materials GLASS - glasses OTHER - miscellaneous materials 3D - selected data for 3D artists. HfO2 (Hafnium dioxide, Hafnia)   MgF2 (Magnesium fluoride) Jellison 1992: n,k 0.234-0.840 µm Li (Lithium) Bi4Ge3O12 (Bismuth germanate, BGO) Germanium (Ge) Germanium has proved to be the most useful semiconductor substrate for applications as a window or lens material in the 1.6 - 18µm region. Fe3O4 (Iron(II,III) oxide, Magnetite) AlN (Aluminium nitride) BeO (Beryllium monoxide) InAs (Indium arsenide) Li 1980: n 1.9-18 µm; 250 K TlCl (Thallium chloride) LuAl3(BO3)4 (Lutetium aluminium borate, LuAB) CsLiB6O10 (Cesium lithium borate, CLBO) CdTe (Cadmium telluride) Germanium is not usually used at high temperatures because of the excessive absorption caused by the increased number of thermally generated holes. Eu (Europium) Nb (Niobium) LiCaAlF6 (Lithium calcium aluminum fluoride, LiCAF) Invited Paper SPIE Conference Glasgow 2008, ISO 9001 certified through LRQA and ISO 14001 certified through SGS, Registered Office: 1 Broom Road Business Park, Poole, Dorset, BH12 4PA, UK. Below are files of complete refractive index and extinction coefficients. 0.3 0.4 0.5 0.6 0.7 0.8 0 1 2 3 4 5 6 7 RefractiveIndex.INFO Ge (Germanium) Aspnes and Studna 1983: n,k 0.21 … Therefore, achieving high quality optical germanium is a compromise between dopant levels and intrinsic hole concentration. B4C (Boron carbide) SiC (Silicon carbide) Er (Erbium) Pt (Platinum) YLiF4 (Yttrium lithium fluoride, YLF) [TXT - tab separated] TiC (Titanium carbide) LiB3O5 (Lithium triborate, LBO) SrTiO3 (Strontium titanate, STO) This agreed well with similar measurements by Horrigan et al for n-type single crystal Ge with impurity concentrations less than 1013 cm-3 using a CO2 laser. AgGaS2 (Silver gallium sulfide, AGS) Nunley et al, 2016: n,k 0.188-2.48 µm Refractive index of Ge (Germanium) - Li-293K. However, since there are two atoms per unit cell, there are still optical and acoustic branches of the phonon dispersion curves to generate the multi-phonon absorption. Amotchkina et al, 2020: 0.42 µm film; n,k 0.4-15 µm, H. H. Li. Abstract. Created with Highcharts 5.0.14. PbTiO3 (Lead titanate) Li 1980: n 1.9-18 µm; 400 K CsF (Cesium fluoride) CS2 (Carbon disulfide) This is the principal reason no Reststrahl type absorption occurs in the Group IV elements, particularly as there is no dipole moment (homopolar) to couple with the incident radiation. KBr (Potassium bromide) CsCl (Cesium chloride) PbF2 (Lead difluoride) From this model, the refractive index varies over the temperature range of 250K by approximately 45ppm/K from a mean temperature coefficient (dn/dT) of +4.1x10-4 K-1 between 2-20µm. Pd (Palladium) Cu (Copper) Li 1980: n 1.9-18 µm; 100 K All rights reserved. Ir (Iridium) CsI (Cesium iodide) The multi-phonon absorption profile in germanium is complex, consisting of several types of phonon vibrations, primarily due to the transfer of energy from low energy photons to free carriers, this is accompanied by the transfer of momentum between free carriers and phonons in the crystalline lattice. This combination of high refractive index and low dispersion also means imaging by a single Ge lens with low f-number is easily achievable. Li 1980: n 1.9-18 µm; 550 K Te (Tellurium) CuCl (Cuprous chloride) Sc (Scandium) Ta2O5 (Tantalum pentoxide) CsLiB6O10 (Cesium lithium borate, CLBO) Re (Rhenium) KCl (Potassium chloride) TlBr (Thallium bromide) VC (Vanadium carbide) It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. AlAs (Aluminium arsenide) To download this data or our MSDS safety data sheet as a pdf, please click on the links at the top of the page. Si3N4 (Silicon nitride) PbI2 (Lead iodide) VN (Vanadium nitride) GLASS - glasses RbI (Rubidium iodide) Li 1980: n 1.9-18 µm; 150 K Wavelength, µm n, k. Chart context menu. SiO (Silicon monoxide) CaF2 (Calcium fluoride) Ag (Silver) Al (Aluminium) MgAl2O4 (Magnesium aluminate, spinel) Y3Al5O12 (Yttrium aluminium garnet, YAG) Ar (Argon) AlAs (Aluminium arsenide) GaAs (Gallium arsenide) InAs (Indium arsenide) … LiBr (Lithium bromide) They also found that the absorption increased with increasing temperature. The principal region of transparency extends from ~1.8-18µm at 300K extending to ~1.5-18µm at 50K. PbSe (Lead selenide) BeO (Beryllium monoxide) The maximum transmittance derived from this experiment, at 300K and 10.6µm, was for samples doped with antimony to a resistivity of 5-10Ωcm with n-type conductivity producing an absorption coefficient of 0.02cm-1 . It is also non-hydroscopic, non-toxic and possesses good thermal conductivity. For a typical sample of Ge the refractive index and extinction coefficient at 632.8 nm are 5.47661 and 0.7842102. Ti (Titanium) AgGaSe2 (Silver gallium selenide, AGSe)

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