Low-loss, low-cross-talk crossings for silicon-on-insulator nanophotonic waveguides.
We present compact crossings for silicon-on-insulator photonic wires. The waveguides are broadened using a 3 microm parabolic taper in each arm. By locally applying a lower index contrast using a double-etch technique, loss of confinement is reduced and 97.5% transmission (-1.7 dB) is achieved with only -40 dB cross talk.
Bogaerts
Wim
W
Ghent University - IMEC, Department of Information Technology, Sint-Pietersnieuwstraat 41, 9000 Gent, Belgium. wim.bogaerts@intec.ugent.be
Dumon
Pieter
P
Van Thourhout
Dries
D
Baets
Roel
R