Title :
Topology optimised broadband photonic crystal Y-splitter
Author :
Borel, P.I. ; Frandsen, L.H. ; Harpoth, A. ; Kristensen, M. ; Jensen, J.S. ; Sigmund, O.
Author_Institution :
Res. Center COM, Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
A planar photonic crystal waveguide Y-splitter that exhibits large-bandwidth low-loss 3 dB splitting for TE-polarised light has been fabricated in silicon-on-insulator material. The high performance is achieved by utilising topology optimisation to design the Y-junction and by using topology optimised low-loss 60° bends. The average excess loss of the entire component is found to be 0.44±0.29 dB for a 100 nm bandwidth, and the excess loss due to the Y-junction is found to be 0.34±0.30 dB in a 175 nm bandwidth.
Keywords :
elemental semiconductors; optical beam splitters; optical losses; optical materials; optical planar waveguides; photonic crystals; silicon; silicon-on-insulator; waveguide junctions; 0.04 dB; 0.15 dB; 0.64 dB; 0.73 dB; 3 dB; Si; TE polarised light; Y-junction; average excess loss; broadband planar photonic crystal waveguide Y-splitter; optical materials; optical transmission; silicon-on-insulator; topology optimised low loss bends;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20057717
