Low propagation loss of 0.76 dB/mm in GaAs-based single-line-defect two-dimensional photonic crystal slab waveguides up to 1 cm in length

Abstract

Straight single-line-defect photonic crystal (PC) waveguides on GaAs slabs with lengths of 1, 4, and 10 mm have been fabricated. By controlling the Al content of a sacrificial AlGaAs clad layer and the wet etching duration, a PC core layer with a very smooth surface was obtained. Atomic force microscope images indicate that the roughness on the top surface is less than 1 nm. An extremely low propagation loss of 0.76 dB/mm for the GaAs-based PC waveguide was achieved.

Nanophotonic waveguides in silicon-on-insulator fabricated with CMOS technology

“…However, by removing the oxide cladding in SOI, and thus creating a membrane, the light line of the cladding is shifted to higher frequencies. In this way, a W1 waveguide with sufficient bandwidth is possible, and waveguides with very low propagation losses (less than 1 dB/mm) have been demonstrated both in silicon membranes [10], [11] and in GaAs membranes [12].…”

Bandwidth engineering of photonic crystal waveguide bends

“…Thereby, the overall size of optical components based on PhCW structures may be greatly minimised and, correspondingly, device packing density increased. Recent advances in deep UV lithography at 248 nm [5] have made mass fabrication of optical ultra-compact PhCW devices viable by employing existing fabrication methods commonly encountered in the semiconductor electronics industry.Research has now reached a level where existing fabrication technologies allow manufacture of PhCW structures with low propagation losses [6][7][8][9]. Hence, there is presently worldwide focus on the design and fabrication of PhCW structures possessing adequate bandwidths.…”

“…Research has now reached a level where existing fabrication technologies allow manufacture of PhCW structures with low propagation losses [6][7][8][9]. Hence, there is presently worldwide focus on the design and fabrication of PhCW structures possessing adequate bandwidths.…”

Liquid Crystals into Planar Photonic Crystals

“…3. Scanning electron microscopy images of (a) InP-based substrate-like and (b) GaAsbased membrane-like planar photonic crystals [(a) Ferrini et al, 2002a; Sugimoto et al, 2004].…”