Adaptive waveguide bends with homogeneous, nonmagnetic, and isotropic materials.

We propose a method for adaptive waveguide bends using homogeneous, nonmagnetic, and isotropic materials, which simplifies the parameters of the bends to the utmost extent. The proposed bend has an adaptive and compact shape because of all the flat boundaries. The nonmagnetic property is realized by selecting OB'/OC = 0.5. Only two nonmagnetic isotropic dielectrics are needed throughout, and the transmission is not sensitive to nonmagnetic isotropic dielectrics. Results validate and illustrate these functionalities, which make the bend much easier to fabricate and apply, owing to its simple parameters, compact shape, and versatility in connecting different waveguides.

[1]  Huanyang Chen,et al.  Transformation optical design of a bending waveguide by use of isotropic materials. , 2009, Applied optics.

[2]  K. Hingerl,et al.  Coordinate transformation based design of confined metamaterial structures , 2008, 0807.4215.

[3]  Li Hu,et al.  Spherical cloaking with homogeneous isotropic multilayered structures. , 2009, Physical review. E, Statistical, nonlinear, and soft matter physics.

[4]  C. Qiu,et al.  Isotropic nonmagnetic flat cloaks degenerated from homogeneous anisotropic trapeziform cloaks. , 2010, Optics express.

[5]  David R. Smith,et al.  Optical design of reflectionless complex media by finite embedded coordinate transformations. , 2007, Physical review letters.

[6]  J. Huangfu,et al.  Application of coordinate transformation in bent waveguides , 2008 .

[7]  J. Hsu,et al.  Systematic design of microprism-type low-loss step-index bent waveguides. , 1998, Applied optics.

[8]  T. Cui,et al.  Arbitrary bending of electromagnetic waves using realizable inhomogeneous and anisotropic materials. , 2008, Physical review. E, Statistical, nonlinear, and soft matter physics.

[9]  David R. Smith,et al.  Broadband Ground-Plane Cloak , 2009, Science.

[10]  David R. Smith,et al.  Transformation-optical design of sharp waveguide bends and corners , 2008 .

[11]  David R. Smith,et al.  Controlling Electromagnetic Fields , 2006, Science.

[12]  U. Leonhardt.  Optical Conformal Mapping , 2006, Science.

[13]  J. Joannopoulos,et al.  High Transmission through Sharp Bends in Photonic Crystal Waveguides. , 1996, Physical review letters.

[14]  Shanhui Fan,et al.  Bends and splitters in metal-dielectric-metal subwavelength plasmonic waveguides , 2005 .

[15]  A. Kildishev,et al.  Engineering space for light via transformation optics. , 2007, Optics letters.