MoO3 (Molybdenum trioxide) ZnO (Zinc monoxide) Germanium is a high index material that is used to manufacture Attenuated Total Reflection (ATR) prisms for spectroscopy. VC (Vanadium carbide) AlAs (Aluminium arsenide) Chromium (Cr) Yb (Ytterbium) The standard uncertainty for the measurements ranges from 1.5 x 10^-5 to 4.2 x 10^-5, generally increasing with wavelength. 5.47661 and 0.7842102. Shelf. Te (Tellurium) Nb (Niobium) Icenogle et al. PbF2 (Lead difluoride) V (Vanadium) Ag3AsS3 (Silver arsenic sulfide) Al (Aluminium) Bi12SiO20 (Bismuth silicate, BSO) Sc (Scandium) BP (Boron phosphide) For a typical sample of Ge the refractive index Fe3O4 (Iron(II,III) oxide, Magnetite) CdGeP2 (Cadmium germanium phosphide) BeO (Beryllium monoxide) MgO (Magnesium monoxide) D2 (Deuterium) OTHER - miscellaneous materials TiH2 (Titanium hydride) CdGeAs2 (Cadmium germanium arsenide) BiFeO3 (Bismuth ferrite, BFO) YLiF4 (Yttrium lithium fluoride, YLF) Find out more about our products and services, Find out more about our research interests, Spectral Characterisation of Infrared Optical Materials and Filters. N2 (Nitrogen) Fe2O3 (Iron sesquioxide, Hematite) AgGaS2 (Silver gallium sulfide, AGS) BaB2O4 (Barium borate, BBO) KTiOPO4 (Potassium titanyl phosphate, KTP) PbMoO4 (Lead Molybdate) For intrinsically neutral Ge, the number of holes times the number of electrons is a constant. RbF (Rubidium fluoride) Mn (Manganese) Both germanium and silicon have a diamond type structure, where each atom is surrounded by four adjacent atoms occupying the corner points of a tetrahedron, to which it is bound by covalently bonded electron paired bonds. Ag3AsS3 (Silver arsenic sulfide) Ciesielski et al. Jellison 1992: n,k 0.234-0.840 µm Mn (Manganese) Se (Selenium) Burnett et al. Inst. MgH2 (Magnesium hydride) 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; 200 K 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. RbTiOPO4 (Rubidium titanyl phosphate, RTP) RbF (Rubidium fluoride) LiNbO3 (Lithium niobate) Mo (Molybdenum) Pt (Platinum) CO (Carbon monoxide) It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. NaI (Sodium iodide) b) (10 points) Calculate the transmission angle @z. CsF (Cesium fluoride) RbBr (Rubidium bromide) Ti (Titanium) TiN (Titanium nitride) CuO (Copper monoxide) at 632.8 nm are Lu2O3 (Lutetium sesquioxide) KH2PO4 (Potassium dihydrogen phosphate, KDP) GaSb (Gallium antimonide) B (Boron) O2 (Oxygen) NaF (Sodium fluoride) ZnSe (Zinc selenide) TiH2 (Titanium hydride) InP (Indium phosphide) LuAl3(BO3)4 (Lutetium aluminium borate, LuAB) Tl3AsSe3 (Thallium arsenic selenide, TAS) He (Helium) CuGaS2 (Copper gallium sulfide) TlCl (Thallium chloride) CaWO4 (Calcium tungstate) ZnTe (Zinc telluride) PbSe (Lead selenide) KTaO3 (Potassium tantalate) Li 1980: n 1.9-18 µm; 100 K CuCl (Cuprous chloride) PbTiO3 (Lead titanate) Burnett et al. CsBr (Cesium bromide) Nb2O5 (Niobium pentoxide) Ag (Silver) Al (Aluminium) MgAl2O4 (Magnesium aluminate, spinel) Y3Al5O12 (Yttrium aluminium garnet, YAG) Ar (Argon) AlAs (Aluminium arsenide) GaAs (Gallium arsenide) InAs (Indium arsenide) … ) or https:// means you've safely connected to the .gov website. Au (Gold) AgCl (Silver chloride) NH3 (Ammonia) Ni (Nickel) CaSO4 (Calcium sulfate) W (Tungsten) Cu2O (Copper(I) oxide) Sn (Tin) Li (Lithium) C (Carbon, diamond, graphite, graphene) Ciesielski et al. LiCaAlF6 (Lithium calcium aluminum fluoride, LiCAF) CaF2 (Calcium fluoride) CsCl (Cesium chloride) 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. TlBr (Thallium bromide) BP (Boron phosphide) ZnS (Zinc sulfide) Bi4Ge3O12 (Bismuth germanate, BGO) Amotchkina et al, 2020: n,k 0.400-11.0 µm Amotchkina et al, 2020: n,k 0.400-11.0 µm MAIN - simple inorganic materials ORGANIC - organic materials GLASS - glasses OTHER - miscellaneous materials 3D - selected data for 3D artists. N2 (Nitrogen) KF (Potassium fluoride) CsI (Cesium iodide) LuAl3(BO3)4 (Lutetium aluminium borate, LuAB) Bi (Bismuth) GaN (Gallium nitride) ZnS (Zinc sulfide) Na (Sodium) V (Vanadium) GeO2 (Germanium dioxide, Germania) He (Helium) However, excessive addition leads to higher electron concentration and subsequent increased absorption. Sn (Tin) CdSe (Cadmium selenide) AcceptWe use cookies to ensure that we give you the best experience on our Fe (Iron) Shelf Be (Beryllium) Be (Beryllium) WS2 (Tungsten disulfide) To expand the transmission graphs, please click on the image. ZnSe (Zinc selenide) 2016: n 2.00-14.0 µm YbF3 (Ytterbium trifluoride) Ho (Holmium) Tm (Thulium) Germanium can be AR coated with Diamond producing an extremely tough front optic. Soc. InAs (Indium arsenide) Ref. Ta (Tantalum) KH2PO4 (Potassium dihydrogen phosphate, KDP) Accurate dispersive refractive index data has been extensively investigated over a number of years. Ge optical components (lenses, filters, beamsplitters etc.) LiNbO3 (Lithium niobate) Li 1980: n 1.9-18 µm; 450 K KCl (Potassium chloride) Li 1980: n 1.9-18 µm; 500 K Share sensitive information only on official, secure websites. CaMoO4 (Calcium molybdate) Os (Osmium) 2016: n 2.00-14.0 µm 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. CO2 (Carbon dioxide) Bi (Bismuth) Pt (Platinum) Li 1980: n 1.9-18 µm; 350 K Ce (Cerium) Sr (Strontium) Jellison 1992: n,k 0.234-0.840 µm Mg (Magnesium) CeF3 (Cerium trifluoride) RbI (Rubidium iodide) HfO2 (Hafnium dioxide, Hafnia) PbSe (Lead selenide) An official website of the United States government. As2S3 (Arsenic trisulfide) Pd (Palladium) MgAl2O4 (Magnesium aluminate, spinel) Optical constants of Y 2 O 3 (Yttrium sesquioxide) Nigara 1968: n 0.25-9.6 µm. LaF3 (Lanthanum fluoride) Wavelength, µm n, k. Chart context menu. LiI (Lithium iodide) SiC (Silicon carbide) Tm (Thulium) [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. Li 1980: n 1.9-18 µm; 550 K MoTe2 (Molybdenum ditelluride) SrF2 (Strontium fluoride) Rev. Refractive index database [about] Shelf ... Germanium is a popular optical material for infrared wavelengths. Li 1980: n 1.9-18 µm; 150 K Nb (Niobium) Refractive index of silicon and germanium and its wavelength and temperature derivatives, J. Phys. For the absorption to occur, these processes must coincide jointly to retain the conservation of energy and momentum. Secure .gov websites use HTTPS GaP (Gallium phosphide) LaF3 (Lanthanum fluoride) Ta2O5 (Tantalum pentoxide) Ciesielski et al. FOR ENQUIRIES+44(0) 1202 307650Designed and manufactured in the UK, ♦ Germanium (Ge) Data Sheet ♦ Germanium (Ge) MSDS ♦ Germanium (Ge) FDS (French).