The disclosure relates to a laminar evaporator including an electrical resistance heating element for pulse heating and evaporation of an inhalationally receivable material distributed or distributable on the heating element surface by an electric heating current flowing or flowable in a laminar manner with at least two electrical contacts or poles for introducing the heating current into the resistance heating element, wherein the resistance heating element has at least one slot-shaped recess constricting lines of flux of an original electric field forming or formable between the at least two electrical contacts or poles and comprises a porous structure having a porosity of 70% or greater holding or capable of holding the material.
