High-transmission waveguide with a small radius of curvature at a bend fabricated by use of a circular photonic crystal

Abstract

A bent photonic crystal waveguide was fabricated by use of a lattice pattern of a circular photonic crystal that allowed high transmission for a broad band of wavelengths with a small radius of curvature at a bend. The waveguide was fabricated by use of alumina rods with a diameter of 3 mm. Windows of high transmission as a result of waveguiding were observed near 9 and 15 GHz. By measurement of the relative wave intensity [E]2 along the line defects, the propagation losses in the straight and the bent sections were estimated at 9.3 GHz to be 0.04 and 0.03 dB/mm, respectively.

Radial Photonic Crystal Shells and Their Application as Resonant and Radiating Elements

“…This permits the analysis in terms of propagation characteristics (allowed or forbidden modes, propagation and attenuation constants…), that can be summarized in dispersion diagrams. Additionally, other radial structures such as dielectric photonic crystals have also been investigated, [24,25], with the target of creating isotropic bandgaps and high quality-factor (Q) resonators, [26]. Nevertheless, these radial proposals were not easily described in terms of purely periodic parameters.…”

Circular Photonic Crystal Fibers: Numerical Analysis of Chromatic Dispersion and Losses

“…Recently, there have been new types of cross-sectional geometry where air holes are arranged in a circular pattern [11][12][13][14][15][16]. Photonic Crystal with air holes arranged in circular layer arrangements has been investigated for different applications [11][12][13][14][15] such as studying thermal properties for electrical driving [11], high transmission waveguides [12], high quality factor microcavity lasers with isotropic photonic band gap effect [13], localization of electromagnetic waves [14] and achieving ultraflat dispersion [15], and so forth.…”

“…Photonic Crystal with air holes arranged in circular layer arrangements has been investigated for different applications [11][12][13][14][15] such as studying thermal properties for electrical driving [11], high transmission waveguides [12], high quality factor microcavity lasers with isotropic photonic band gap effect [13], localization of electromagnetic waves [14] and achieving ultraflat dispersion [15], and so forth. Argyros et al [16] realized PCF with circular air holes arrangement with polymer background.…”

Development of curved two-dimensional photonic crystal waveguides

“…Although circular waveguides have been previously proposed [10,11], our design enables waveguides to follow more general curves.…”