Reflection coefficients of large active scatterers

Ariel Cohen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The reflection from large absorbing scatterers having a complex refractive index m=n1-iκ (κ>0), is determined by the Fresnel reflection coefficients. Lasing materials with inverted population or having a complex refractive index m=n1+iκ "reflect" the incident light with different coefficients, since internal reflections must be taken into account. The reflection coefficients for long cylindrical active scatterers are derived as asymptotic results of the theory of light scattering by large tilted cylinders and explained by polarization considerations. The resulting coefficients can be applied to active scatterers with very large reflection coefficients (negative extinctions).

Original languageEnglish
Pages (from-to)2437-2440
Number of pages4
JournalJournal of Applied Physics
Volume58
Issue number7
DOIs
StatePublished - 1985

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