Systematically Designed PCW Bends With Very Large Bandwidth and High Transmission: An Experimental Demonstration

Abstract

We report our experimental demonstration of ultrawide bandwidth photonic crystal waveguide (PCW) bends. The reported bends have 58-nm more guiding bandwidth than a simple bend. The high transmission window for these demonstrated bends covers the complete single-mode frequency range of the PCW.

High efficiency coupling of light from a ridge to a photonic crystal waveguide

“…The fabricated structures were characterized using a fiber-based, swept wavelength laser (Agilent Technologies Model 81680A, linewidth 100 kHz) setup; more details of the characterization setup can be found in [29]. Exact characterization of PCWs is challenging, as there are three loss factors that affect the transmission and it is almost impossible to decouple them.…”

“…The designs were fabricated at the Nanotechnology Research Center at Georgia Tech using electron beam lithography (with ZEP as the e-beam resist) and inductively coupled plasma etching (using Cl 2 plasma). More details of the fabrication process are presented in detail in [29]. The scanning electron microscopy (SEM) images of some of the fabricated structures are shown in Fig.…”