Dissipation loss of mid-infrared radiation in a dielectric waveguide

Averkiev, N. S.; Slipchenko, S. O.; Sokolova, Z. N.; Tarasov, I. S.
February 2010
Semiconductors;Feb2010, Vol. 44 Issue 2, p243
Academic Journal
Dissipation loss of electromagnetic radiation with wavelengths of 20–55 μm was theoretically studied in a three-layer planar dielectric insulating waveguide combined with a heterolaser. It was shown that the dependence of the loss on the waveguide layer thickness behaves differently for different wavelengths in the range of 20–55 μm. The lowest loss (several inverse centimeters) is characteristic of radiation with wavelength λ = 20 μm. The losses increase with the wavelength and reach a value of 150 cm-1 at λ = 40 μm, which is almost independent of the waveguide layer thickness. For electromagnetic radiation with λ = 50 and 55 μm, a sharp (hundreds of times) decrease in the loss with an increase in the waveguide layer thickness is observed.


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