Modal cutoff condition of an optical chiral fiber with different chiralities in the core and the cladding

Waves in Microstructured Conducting Sheath Helix Embedded Optical Guides with Chiral Nihility and Chiral Materials

“…For the propagating mode, must be real valued; an imaginary value of will correspond to nonpropagating mode. Now, the constitutive relations for homogeneous, lossless, and isotropic chiral mediums are given as [2]…”

“…As the region is being composed of isotropic material, the electric permittivity 2 is taken to be a constant. The use of Maxwell's equations and the constitutive relations in (4a) and (4b) provides the following expressions for electric/magnetic fields in the clad section of guide [2]:…”

“…Due to many exotic electromagnetic characteristics, chiral materials attracted the attention of investigators. The interesting property of chiral medium is the deficiency in uniformity of its inner structure, which consequently results in cross-coupling of electric and magnetic fields [1,2], making thereby the analytical treatments rather formidable. One of the interesting properties of chiral metamaterials is having the phenomenon of negative refraction/reflection that can be achieved by increasing the chirality [3,4], and the applications of such phenomenon are described in [5,6] as well.…”

Guidance and leakage properties of chiral optical fibers

“…[7][8][9][10][11][12] Circular open chirowaveguides, in particular, have been also analyzed. [13][14][15][16][17][18] One would say, therefore, that the field theory of guided waves in chiral optical fibers, including the general case in which both core and cladding are made from chiral materials, 16 appears already to have been covered in the literature. We show in this paper that such is not the case: There has been no study of the leakage effect associated with semileaky modes in chiral optical fibers, as far as the authors are aware.…”