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Optical constants of Ge (Germanium)
Aspnes and Studna 1983: n,k 0.21-0.83 µm
(0.2066 – 0.8266)
Complex refractive index (
Derived optical constants
Crysal orientation: <111>; Doping: 2.5×10
14 cm -3, n; Room temperature References
D.E. Aspnes and A. A. Studna. Dielectric functions and optical parameters of Si, Ge, GaP, GaAs, GaSb, InP, InAs, and InSb from 1.5 to 6.0 eV,
Phys. Rev. B 27, 985-1009 (1983)
Germanium is a popular optical material for infrared wavelengths. Ge optical components (lenses, filters, beamsplitters etc.) are used in thermal imaging, CO
lasers, night vision systems and other applications in mid-wave infrared (MWIR) and long-wave infrared (LWIR).
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