Extremely small polarization beam splitter based on a multimode interference coupler with a silicon hybrid plasmonic waveguide.

A novel polarization beam splitter (PBS) with an extremely small footprint is proposed based on a multimode interference (MMI) coupler with a silicon hybrid plasmonic waveguide. The MMI section, covered with a metal strip partially, is designed to achieve mirror imaging for TE polarization. On the other hand, for TM polarization, there is almost no MMI effect since the higher-order TM modes are hardly excited due to the hybrid plasmonic effect. With this design, the whole PBS including the 1.1 μm long MMI section as well as the output section has a footprint as small as ∼1.8 μm×2.5 μm. Besides, the fabrication process is simple since the waveguide dimension is relatively large (e.g., the input/output waveguides widths w ≥300 nm and the MMI width w(MMI)=800 nm). Numerical simulations show that the designed PBS has a broad band of ∼80 nm for an ER >10 dB as well as a large fabrication tolerance to allow a silicon core width variation of -30 nm

[1]  P. Lam,et al.  Memory-enhanced noiseless cross-phase modulation , 2011, Light: Science & Applications.

[2]  Sailing He,et al.  Proposal for an Ultracompact Polarization-Beam Splitter Based on a Photonic-Crystal-Assisted Multimode Interference Coupler , 2007, IEEE Photonics Technology Letters.

[3]  Daoxin Dai,et al.  Silicon Polarization Beam Splitter Based on an Asymmetrical Evanescent Coupling System With Three Optical Waveguides , 2012, Journal of Lightwave Technology.

[4]  J. Bowers,et al.  Passive technologies for future large-scale photonic integrated circuits on silicon: polarization handling, light non-reciprocity and loss reduction , 2012, Light: Science & Applications.

[5]  Shiyang Zhu,et al.  CMOS compatible polarization splitter using hybrid plasmonic waveguide. , 2012, Optics express.

[6]  Dan-Xia Xu,et al.  Polarization management for silicon photonic integrated circuits , 2013 .

[7]  B. M. A. Rahman,et al.  Design of optical polarization splitters in a single-section deeply etched MMI waveguide , 2001 .

[8]  Lech Wosinski,et al.  Ultracompact and broadband polarization beam splitter utilizing the evanescent coupling between a hybrid plasmonic waveguide and a silicon nanowire. , 2013, Optics letters.

[9]  Huaxiang Yi,et al.  High extinction ratio polarization beam splitter with multimode interference coupler on SOI , 2013 .

[10]  Giuseppe Vallone,et al.  Polarization entangled state measurement on a chip , 2010, CLEO: 2011 - Laser Science to Photonic Applications.

[11]  M.K. Smit,et al.  Mach-Zehnder interferometer polarization splitter in InGaAsP/InP , 2004 .

[12]  Daming Zhang,et al.  Ultrashort Polarization Splitter Using Two-Mode Interference in Silicon Photonic Wires , 2009 .

[13]  Seung Gol Lee,et al.  Design and fabrication of a significantly shortened multimode interference coupler for polarization splitter application , 2003 .

[14]  Henry I. Smith,et al.  Polarization-transparent microphotonic devices in the strong confinement limit , 2007 .

[15]  J. Bowers,et al.  Novel ultra-short and ultra-broadband polarization beam splitter based on a bent directional coupler. , 2011, Optics express.

[16]  Lech Wosinski,et al.  Ultracompact polarization beam splitter based on a dielectric-hybrid plasmonic-dielectric coupler. , 2012, Optics Letters.

[17]  Jie Lin,et al.  Compact silicon slot waveguide polarization splitter , 2009 .

[18]  Jinghua Teng,et al.  An Ultracompact Directional Coupler Based on GaAs Cross-Slot Waveguide , 2010, IEEE Photonics Technology Letters.

[19]  H.K. Tsang,et al.  Integrated polarization beam splitter in high index contrast silicon-on-insulator waveguides , 2005, IEEE Photonics Technology Letters.

[20]  Xu Liu,et al.  Design of a Compact Polarization Splitter in Horizontal Multiple-Slotted Waveguide Structures , 2008 .

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

[22]  R. Baets,et al.  High efficiency Silicon-on-Insulator grating coupler based on a poly-Silicon overlay. , 2006, Optics express.

[23]  J. Yamauchi,et al.  Coupled Waveguide Polarization Splitter With Slightly Different Core Widths , 2008, Journal of Lightwave Technology.

[24]  Sailing He,et al.  A silicon-based hybrid plasmonic waveguide with a metal cap for a nano-scale light confinement. , 2009, Optics express.

[25]  Siegfried Janz,et al.  Passive broadband silicon-on-insulator polarization splitter. , 2007, Optics letters.

[26]  Zhiping Zhou,et al.  Ultracompact and silicon-on-insulator-compatible polarization splitter based on asymmetric plasmonic–dielectric coupling , 2013 .

[27]  Zhiping Zhou,et al.  Polarization beam splitter using a binary blazed grating coupler. , 2007, Optics letters.

[28]  I. Nikolov,et al.  Analysis of the dispersion of optical plastic materials , 2007 .