METHOD FOR SEPARATION OF COMBINED SURFACE AND VOLUME ELECTROMAGNET WAVES OF TERAHERTZ RANGE Russian patent published in 2009 - IPC G02B27/10 G01N21/43 

FIELD: physics.

SUBSTANCE: method for separation of combined surface and volume electromagnet waves of terahertz range, which includes preliminary shaping of groove with smoothened edges on sample surface, at that groove axis is perpendicular to plane of incidence that crosses track of surface electromagnet wave (SEW) rays bundle and having size along track that is less that SEW spread length, and further direction of combined waves to groove, differs by the fact that groove is shaped in the form of regular cone half, axis of which lies in the plane of sample surface, at that angle of SEW deviation from incidence plane that contains volume wave, is equal to the following: γ=arcsin[tg(α)-(π-2)-k'], where α is angle between generatrix and cone axis, k' is actual part of SEW refraction index.

EFFECT: provision of spatial separation of SEW and volume wave by means of SEW direction variation.

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