Topology optimization of waveguide bends with wide, flat bandwidth in air-bridge-type photonic crystal slabs

We employed the topology optimization (TO) method to improve the transmission bandwidth of waveguide bends in air-bridge-type, two-dimensional photonic crystal slabs. We experimentally confirmed that bend loss at longer wavelengths in the vicinity of the band edge was suppressed by using TO. The optimized bends showed good performance, comparable to that of straight waveguides.

[1]  A. Harpoth,et al.  Topology design and fabrication of an efficient double 90/spl deg/ photonic Crystal waveguide bend , 2005, IEEE Photonics Technology Letters.

[2]  Yoshimasa Sugimoto,et al.  Fabrication and characterization of different types of two-dimensional AlGaAs photonic crystal slabs , 2002 .

[3]  S. Noda,et al.  Waveguides and waveguide bends in two-dimensional photonic crystal slabs , 2000 .

[4]  Steven G. Johnson,et al.  Guided modes in photonic crystal slabs , 1999 .

[5]  Jakob S. Jensen,et al.  Topology optimization and fabrication of photonic crystal structures. , 2004, Optics express.

[6]  K. Asakawa,et al.  Ultra-fast photonic crystal/quantum dot all-optical switch for future photonic networks , 2004, 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference.

[7]  J. Shannon,et al.  Forming in hydrogenated amorphous silicon metal-semiconductor-metal devices using bipolar pulse stressing , 2005 .

[8]  L. Naesens,et al.  Antiviral treatment is more effective than smallpox vaccination upon lethal monkeypox virus infection , 2006, Nature.

[9]  Susumu Noda,et al.  Trapping and emission of photons by a single defect in a photonic bandgap structure , 2000, Nature.

[10]  Jakob S. Jensen,et al.  Topology optimization of photonic crystal structures: a high-bandwidth low-loss T-junction waveguide , 2005 .

[11]  Peter Ingo Borel,et al.  Photonic crystal and quantum dot technologies for all-optical switch and logic device , 2006 .

[12]  Makoto Okano,et al.  Wider bandwidth with high transmission through waveguide bends in two-dimensional photonic crystal slabs , 2002 .

[13]  Jakob S. Jensen,et al.  Systematic design of photonic crystal structures using topology optimization: Low-loss waveguide bends , 2004 .

[14]  Yoshimasa Sugimoto,et al.  Broadband waveguide intersection with low crosstalk in two-dimensional photonic crystal circuits by using topology optimization. , 2006, Optics express.

[15]  Iraklis Ntakis,et al.  Optimization of transmission properties of two-dimensional photonic crystal channel waveguide bends through local lattice deformation , 2004 .

[16]  Nikolaj Moll,et al.  Bend design for the low-group-velocity mode in photonic crystal-slab waveguides , 2004 .

[17]  Yoshimasa Sugimoto,et al.  Ultra-Small GaAs-Photonic-Crystal-Slab-Waveguide-Based Near-Infrared Components: Fabrication, Guided-Mode Identification, and Estimation of Low-Loss and Broad-Band-Width in Straight-Waveguides, 60°-Bends and Y-Splitters , 2004 .

[18]  Yoshimasa Sugimoto,et al.  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. , 2004, Optics express.

[19]  Peter Ingo Borel,et al.  Broadband photonic crystal waveguide 60° bend obtained utilizing topology optimization , 2004 .

[20]  Hiroshi Ishikawa,et al.  Nonlinear optical phase shift in InAs quantum dots measured by a unique two-color pump/probe ellipsometric polarization analysis , 2004 .