WAVES AND VIBRATIONS IN INHOMOGENEOUS STRUCTURES ...
WAVES AND VIBRATIONS IN INHOMOGENEOUS STRUCTURES ...
WAVES AND VIBRATIONS IN INHOMOGENEOUS STRUCTURES ...
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Broadband photonic crystal waveguide 60° bend<br />
obtained utilizing topology optimization<br />
L.H. Frandsen, A. Harpøth, P.I. Borel, M. Kristensen<br />
Research Center COM, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark<br />
lhf@com.dtu.dk, harpoeth@com.dtu.dk, pib@com.dtu.dk, mk@com.dtu.dk<br />
http://www.com.dtu.dk/research/glass/pipe/index.html<br />
J.S. Jensen and O. Sigmund<br />
Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark<br />
jsj@mek.dtu.dk, sigmund@mek.dtu.dk<br />
http://www.topopt.dtu.dk<br />
Abstract: Topology optimization has been used to design a 60° bend in a<br />
single-mode planar photonic crystal waveguide. The design has been<br />
realized in a silicon-on-insulator material and we demonstrate a recordbreaking<br />
200nm transmission bandwidth with an average bend loss of<br />
0.43±0.27 dB for the TE polarization. The experimental results agree well<br />
with 3D finite-difference-time-domain simulations.<br />
©2004 Optical Society of America<br />
OCIS codes: (000.3860) Mathematical methods in physics; (000.4430) Numerical<br />
approximation and analysis; (130.2790) Guided waves; (130.3130) Integrated optics materials;<br />
(220.4830) Optical systems design; (230.5440) Polarization-sensitive devices; (230.7390)<br />
Waveguides, planar; (999.9999) Photonic crystals.<br />
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#5520 - $15.00 US Received 19 October 2004; revised 12 November 2004; accepted 15 November 2004<br />
(C) 2004 OSA 29 November 2004 / Vol. 12, No. 24 / OPTICS EXPRESS 5916