In this paper. we deduce the paraxial analytical expression for the Gaussian beam propagating in the sandwich slab system which contained double negative material based on light transfer matrix and generalized Huygens-Fresnel integral equation; the evolution properties of emerging Gaussian beam contour graph intensity distribution on the receiver plane. the relation between beam spot ... https://parisnaturalfoodes.shop/product-category/dr-formulated-kids-watermelon-5bil/