Fundamental guided electromagnetic dispersion characteristics in lossless dispersive metamaterial clad circular air-hole waveguides

Abstract

The fundamental guided electromagnetic dispersion characteristics in lossless dispersive metamaterial clad circular air hole waveguides are investigated. Two operating guided modes are found to exist: circular waveguide and surface plasmon polariton modes that support fast and slow waves, respectively. Hybrid mode classifications are also made in an empirical manner so that the guided modes can be sorted into either TM-like or TE-like modes in terms of their unique dispersion characteristics. Unusual dispersion characteristics, including multi-valued propagation constants at a single frequency, backward waves, and subwavelength guided propagations, are observed and discussed in relation to the air-hole radii and dielectric and magnetic constants of the metamaterial clad. A discussion comparing the extraordinary dispersion characteristics with those of other dielectric, plasmonic, and metamaterial waveguides is also included.

Comparing guided modal properties of surface waves along single- and double-negative indexed slab waveguides

“…For e r1 = -1.01 and -1.03, small portions of backward waves were supportable, as shown in the inset of Fig. 2, resulting in a simultaneous three−fold propagation, i.e., two forward waves and a backward wave in between, at the same nor− malized frequency, which has only been observed in cases of hybrid modes for DNG indexed cylindrical guiding struc− tures [19][20][21]. Thus, the possibility of a three−fold propaga− tion along a planar SNG slab waveguide was demonstrated under certain conditions, such as when the absolute value of the negative dielectric constant was little bit higher and the magnetic constant was much higher than those of the sur− rounding medium.…”

Exotic Characteristics of Power Propagation in the Chiral Nihility Fiber

“…Its β/k 0 increases firstly and then decreases as V increases. This abnormal dispersion characteristic has not been found in chiral nihility planar waveguides [46] and in previous NIM circular waveguides [20][21][22][23][24]. Its normalized power is also positive.…”

“…NIM has many unique features [7] and fascinating potential applications such as perfect lens [8], cloaking [9], slow light [10], and novel devices [11,12]. Various NIM waveguides, including the slab [13][14][15][16], grounded slab [17][18][19], and circular [20][21][22][23][24] waveguides filled with NIMs in the core or cladding, have been investigated intensively. Many novel characteristics of electromagnetic waves in NIM waveguides were found.…”

Surface Plasmons in Coaxial Metamaterial Cables

“…Photons are emitted as an insulator's electrons restore themselves to the ground state after the disruption has passed. A reverse Cherenkov effect can be experienced using the NIMs: this means that when a charged particle passes through a (metamaterial) medium at a speed greater than the speed of light in that medium, that particle will radiate from a cone behind itself [see The subject of metamaterials, or (artificially) engineered composites, has gained un unexpected momentum and the research interest seems to have focused not only on the photonic crystals with metamaterial components [26][27][28][29][30][31][32][33] but also on the single-and multi-layered planar structures [34][35][36][37][38][39][40][41][42][43] as well as on the (usually) single cylindrical geometries [44][45][46][47][48][49][50][51][52][53][54][55]. The interesting phenomena emerging from the geometries involving metamaterials include the slowing, trapping, and releasing of the light signals [56], the proposal of the cloaking devices [57], and the extraordinary refraction of light [58] (see Fig.…”