Low cross-talk, deep subwavelength plasmonic metal/insulator/metal waveguide intersections with broadband tunability

We suggest a low cross-talk plasmonic cross-connector based on a metal/insulator/metal cavity and waveguides. We separately investigate the isolated cavity mode, the waveguide mode, and the combination of cavity and waveguide modes using a finite-different time-domain method. Due to resonant tunneling and the cutoff frequency of the odd waveguide mode, our proposed structure achieves a high throughput transmission ratio and eliminates cross-talk. Furthermore, the proposed structure has a broadband tunability of 587 nm, which can be achieved by modulating the cavity air gap thickness. This structure enables the miniaturization of photonic integrated circuits and sensing applications.

[1]  Soon-Hong Kwon,et al.  Elimination of cross-talk in waveguide intersections of triangular lattice photonic crystals. , 2008, Optics express.

[2]  Soon-Hong Kwon,et al.  Room-temperature high-Q channel-waveguide surface plasmon nanocavity. , 2011, Optics express.

[3]  Ye Liu,et al.  High-extinction-ratio and low-insertion-loss Plasmonic Filter with Coherent Coupled Nano-cavity Array in a MIM Waveguide , 2013, Plasmonics.

[4]  Guo Ping Wang,et al.  Optical bistability in metal gap waveguide nanocavities. , 2008, Optics express.

[5]  P. Dumon,et al.  Low-loss, low-cross-talk crossings for silicon-on-insulator nanophotonic waveguides. , 2007, Optics letters.

[6]  S. Xiao,et al.  Resonant-tunnelling-assisted crossing for subwavelength plasmonic slot waveguides. , 2008, Optics express.

[7]  S Fan,et al.  Elimination of cross talk in waveguide intersections. , 1998, Optics letters.

[8]  X. Zhang,et al.  A hybrid plasmonic waveguide for subwavelength confinement and long-range propagation , 2008 .

[9]  R. W. Christy,et al.  Optical Constants of the Noble Metals , 1972 .

[10]  Tae-woo Lee,et al.  Dual-Function Metal–Insulator–Metal Plasmonic Optical Filter , 2015, IEEE Photonics Journal.

[11]  Xueming Liu,et al.  Numerical investigation of an all-optical switch in a graded nonlinear plasmonic grating. , 2012, Nanotechnology.

[12]  Jianfang Wang,et al.  (Gold Nanorod Core)/(Polyaniline Shell) Plasmonic Switches with Large Plasmon Shifts and Modulation Depths , 2014, Advanced materials.

[13]  Shanhui Fan,et al.  Plasmonic coaxial waveguide-cavity devices. , 2015, Optics express.

[14]  Takashi Mukai,et al.  Surface-plasmon-enhanced light emitters based on InGaN quantum wells , 2004, Nature materials.

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

[16]  Harald Giessen,et al.  Nanoantenna-enhanced gas sensing in a single tailored nanofocus , 2011, CLEO: 2011 - Laser Science to Photonic Applications.

[17]  T. Ebbesen,et al.  Dispersion of strongly confined channel plasmon polariton modes , 2011 .

[18]  J. Dionne,et al.  Plasmon slot waveguides: Towards chip-scale propagation with subwavelength-scale localization , 2006 .

[19]  Spatial mapping of refractive index based on a plasmonic tapered channel waveguide. , 2015, Optics express.

[20]  Soon-Hong Kwon,et al.  Plasmonic Ruler With Angstrom Distance Resolution Based on Double Metal Blocks , 2013, IEEE Photonics Technology Letters.

[21]  J. Jeon,et al.  Investigation of Optical and Structural Stability of Localized Surface Plasmon Mediated Light‐Emitting Diodes by Ag and Ag/SiO2 Nanoparticles , 2012 .