Absorption Coefficient as a Function of Resistance for Optical Germanium at 10.6µm
Applied Optics, Vol. 12, Issue 3, pp. 569-572 (1973)
http://dx.doi.org/10.1364/AO.12.000569
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Abstract
Room-temperature transmittance measurements at 10.6 µm were made of germanium single-crystal samples. The samples were cut from very large doped single-crystal slabs that had been grown from +40-Ω-cm charge material of unknown purity for use as infrared windows and image-forming elements. The dependence of the absorption coefficient on sample resistivity was calculated from measured transmittances of ninety-two samples with resistivities ranging from 0.9 Ω-cm to 57 Ωcm. Maximum transmittance at 10.6 µm was obtained for the samples that were doped to a resistivity of 5–10 Ω-cm and n-type conductivity.
Citation
Evan D. Capron and Orville L. Brill, "Absorption Coefficient as a Function of Resistance for Optical Germanium at 10.6µm," Appl. Opt. 12, 569-572 (1973)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-12-3-569
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