Compact gradual bends for channel plasmon polaritons.

We report the design, fabrication and characterization of compact gradual bends for channel plasmon polaritons (CPPs) being excited at telecom wavelengths. We obtain high-quality near-field optical images of CPP modes propagating along a bent V-groove in gold, which indicate good CPP mode confinement in the groove and efficient guiding around the compact S-bend connecting two 5-mum-offset grooves over a distance of 5 mum. Using averaged cross sections of the CPP intensity distributions before and after the S-bend, the total bend loss is evaluated and found to be close to 2.3 dB for the wavelengths in the range of 1430-1640 nm.

[1]  Sheel Aditya,et al.  Performance of S-bends for integrated-optic waveguides , 1998 .

[2]  B. Vohnsen,et al.  Transfer functions in collection scanning near-field optical microscopy , 1999 .

[3]  P. Etienne,et al.  Integrated optics based on organo-mineral materials , 2000 .

[4]  L. Eldada,et al.  Advances in polymer integrated optics , 2000, IEEE Journal of Selected Topics in Quantum Electronics.

[5]  A. Requicha,et al.  Plasmonics—A Route to Nanoscale Optical Devices , 2001 .

[6]  S. Bozhevolnyi,et al.  Bend loss in surface plasmon polariton band-gap structures , 2001 .

[7]  Bernhard Lamprecht,et al.  Surface plasmon propagation in microscale metal stripes , 2001 .

[8]  Peter Ingo Borel,et al.  Near-field imaging of light propagation in photonic crystal waveguides: Explicit role of Bloch harmonics , 2002 .

[9]  Masahiro Tanaka,et al.  Simulations of nanometric optical circuits based on surface plasmon polariton gap waveguide , 2003 .

[10]  A. Hohenau,et al.  Surface plasmon micro‐ and nano‐optics , 2003, Journal of microscopy.

[11]  W. Barnes,et al.  Surface plasmon subwavelength optics , 2003, Nature.

[12]  D. Pile,et al.  Channel plasmon-polariton in a triangular groove on a metal surface. , 2004, Optics letters.

[13]  D. Pile,et al.  Single-mode subwavelength waveguide with channel plasmon-polaritons in triangular grooves on a metal surface , 2004 .

[14]  Changtao Wang,et al.  Surface plasmon polariton propagation and combination in Y-shaped metallic channels. , 2005, Optics express.

[15]  T. Ebbesen,et al.  Channel plasmon-polariton guiding by subwavelength metal grooves. , 2005, Physical review letters.

[16]  Harald Ditlbacher,et al.  Dielectric optical elements for surface plasmons. , 2005, Optics letters.

[17]  Sailing He,et al.  Novel surface plasmon waveguide for high integration. , 2005, Optics express.

[18]  Masanobu Haraguchi,et al.  Theoretical and experimental investigation of strongly localized plasmons on triangular metal wedges for subwavelength waveguiding , 2005 .

[19]  D. Pile,et al.  Plasmonic subwavelength waveguides: next to zero losses at sharp bends. , 2005, Optics letters.

[20]  L. Kuipers,et al.  Near-field characterization of photonic crystal waveguides , 2006 .