PbSe films have been deposited on glass and quartz substrates at room temperature by
thermal evaporation technique. X-ray diffraction patterns of the obtained films showed that
they have polycrystalline texture and exhibit cubic FCC structure. The optical constants, the
refractive index n and absorption index k were calculated in the spectral range of 400–4000
nm from transmittance and reflectance data using Murmann's exact equations. Both n and k
are practically independent on the film thickness in the range 28 nm to 210 nm. From the …