Infrared optical constants of n-type silicon |
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Authors: | J Humlíček K Vojtěchovský |
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Institution: | (1) Department of Solid State Physics, Faculty of Science, J. E. Purkyn University, Kotlá ská 2, 611 37 Brno, Czechoslovakia;(2) Testa Ro nov, k, p., 1. máje 1000, 756 61 Ro nov p. R., Czechoslovakia |
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Abstract: | The infrared optical constants of n-type Si are determined from reflectance and transmittance spectra. The Drude formula with empirically adjusted, concentration dependent, parameters is used. Its low-wavelength limit is in agreement with recent mobility results. A pronounced difference between As-, P-, and Sb-doped Si is found for the free electron concentration above 1019 cm–3. Simple empirical formulae are given for the optical constants as functions of both wavenumber and concentration. |
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