Guided subwavelength slow-light mode supported by a plasmonic waveguide system.

We introduce a plasmonic waveguide system, which supports a subwavelength broadband slow-light guided mode with a tunable slowdown factor at a given wavelength. The system consists of a metal-dielectric-metal (MDM) waveguide side-coupled to a periodic array of MDM stub resonators. The slowdown factor at a given wavelength can be tuned by adjusting the geometrical parameters of the system. In addition, there is a trade-off between the slowdown factor and the propagation length of the supported optical mode. Finally, we show that light can be coupled efficiently from a conventional MDM waveguide to the plasmonic waveguide system.

[1]  M. Koshiba,et al.  High-performance absorbing boundary conditions for photonic crystal waveguide simulations , 2001, IEEE Microwave and Wireless Components Letters.

[2]  E. Glytsis,et al.  Finite-number-of-periods holographic gratings with finite-width incident beams: analysis using the finite-difference frequency-domain method. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[3]  Jianming Jin.  The Finite Element Method , 2010 .

[4]  M. Sandtke,et al.  Slow guided surface plasmons at telecom frequencies , 2007 .

[5]  Guo Ping Wang,et al.  Dual-channel broadband slow surface plasmon polaritons in metal gap waveguide superlattices , 2009 .

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

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

[8]  Mihai Ibanescu,et al.  Surface-plasmon-assisted guiding of broadband slow and subwavelength light in air. , 2005, Physical review letters.

[9]  D. Miller,et al.  Transmission Line and Equivalent Circuit Models for Plasmonic Waveguide Components , 2008, IEEE Journal of Selected Topics in Quantum Electronics.

[10]  Jian-Ming Jin,et al.  The Finite Element Method in Electromagnetics , 1993 .

[11]  D. Gramotnev,et al.  Plasmonics beyond the diffraction limit , 2010 .

[12]  R. Rosenfeld.  Nature , 2009, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

[13]  Georgios Veronis,et al.  Slow-light enhanced absorption switches in metal-dielectric-metal plasmonic waveguides , 2009, CLEO: 2011 - Laser Science to Photonic Applications.

[14]  Yujie J. Ding,et al.  "Rainbow" trapping and releasing at telecommunication wavelengths. , 2009, Physical review letters.

[15]  Shutian Liu,et al.  Surface plasmon reflector based on serial stub structure. , 2009, Optics express.

[16]  E. Ozbay.  Plasmonics: Merging Photonics and Electronics at Nanoscale Dimensions , 2006, Science.

[17]  Backward propagating slow light in inverted plasmonic taper. , 2009, Optics express.

[18]  E. Palik.  Handbook of Optical Constants of Solids , 1997 .

[19]  Xian-Shi Lin,et al.  Tooth-shaped plasmonic waveguide filters with nanometeric sizes. , 2008, Optics letters.

[20]  S. Maier.  Plasmonics: Fundamentals and Applications , 2007 .

[21]  R. Kaul,et al.  Microwave engineering , 1989, IEEE Potentials.

[22]  Atilla Aydinli,et al.  Slowing down surface plasmons on a moiré surface. , 2009, Physical review letters.

[23]  Toshihiro Okamoto,et al.  Characteristics of gap plasmon waveguide with stub structures. , 2008, Optics express.

[24]  E. Economou.  Surface Plasmons in Thin Films , 1969 .