Hybrid graphene plasmonic waveguide modulators

The unique optical and electronic properties of graphene make possible the fabrication of novel optoelectronic devices. One of the most exciting graphene characteristics is the tunability by gating which allows one to realize active optical devices. While several types of graphene-based photonic modulators have already been demonstrated, the potential of combining the versatility of graphene with subwavelength field confinement of plasmonic waveguides remains largely unexplored. Here we report fabrication and study of hybrid graphene–plasmonic waveguide modulators. We consider several types of modulators and identify the most promising one for telecom applications. The modulator working at the telecom range is demonstrated, showing a modulation depth of >0.03 dB μm−1 at low gating voltages for an active device area of just 10 μm2, characteristics which are already comparable to those of silicon-based waveguide modulators while retaining the benefit of further device miniaturization. Our proof-of-concept results pave the way towards on-chip realization of efficient graphene-based active plasmonic waveguide devices for optical communications.

[1]  K. Novoselov,et al.  Detection of individual gas molecules adsorbed on graphene. , 2006, Nature materials.

[2]  F. García-Vidal,et al.  Guiding and focusing of electromagnetic fields with wedge plasmon polaritons. , 2008, Physical review letters.

[3]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[4]  D. Ansell,et al.  Graphene-protected copper and silver plasmonics , 2014, Scientific Reports.

[5]  Xiang Zhang,et al.  Double-layer graphene optical modulator. , 2012, Nano letters.

[6]  F. García-Vidal,et al.  Efficient unidirectional ridge excitation of surface plasmons. , 2009, Optics express.

[7]  Wei Li,et al.  Ultrafast all-optical graphene modulator. , 2014, Nano letters.

[8]  Kinam Kim,et al.  A role for graphene in silicon-based semiconductor devices , 2011, Nature.

[9]  K. Novoselov,et al.  Breakdown of the adiabatic Born-Oppenheimer approximation in graphene. , 2007, Nature materials.

[10]  Stefan A Maier,et al.  Plasmonic field enhancement and SERS in the effective mode volume picture. , 2006, Optics express.

[11]  K. Novoselov,et al.  Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films , 2013, Science.

[12]  A. N. Grigorenko,et al.  Graphene plasmonics , 2012, Nature Photonics.

[13]  V. Kravets,et al.  Singular phase nano-optics in plasmonic metamaterials for label-free single-molecule detection. , 2013, Nature materials.

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

[15]  Nathan Youngblood,et al.  Multifunctional graphene optical modulator and photodetector integrated on silicon waveguides. , 2014, Nano letters.

[16]  Robert C. Wolpert,et al.  A Review of the , 1985 .

[17]  Feng Wang,et al.  Gate-Variable Optical Transitions in Graphene , 2008, Science.

[18]  B. Hecht,et al.  Principles of nano-optics , 2006 .

[19]  V. Kravets,et al.  Surface Hydrogenation and Optics of a Graphene Sheet Transferred onto a Plasmonic Nanoarray , 2012 .

[20]  Francesco De Angelis,et al.  Graphene in a photonic metamaterial. , 2010, Optics express.

[21]  Xiang Zhang,et al.  A graphene-based broadband optical modulator , 2011, Nature.

[22]  F. Xia,et al.  Tunable infrared plasmonic devices using graphene/insulator stacks. , 2012, Nature nanotechnology.

[23]  F. Xia,et al.  Ultrafast graphene photodetector , 2009, CLEO/QELS: 2010 Laser Science to Photonic Applications.

[24]  H. Bechtel,et al.  Graphene plasmonics for tunable terahertz metamaterials. , 2011, Nature nanotechnology.

[25]  A Gholinia,et al.  Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices. , 2012, Nature materials.

[26]  Raluca Dinu,et al.  High-speed plasmonic phase modulators , 2014, Nature Photonics.

[27]  H. R. Krishnamurthy,et al.  Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor. , 2008, Nature nanotechnology.

[28]  P. Kim,et al.  Dirac charge dynamics in graphene by infrared spectroscopy , 2008, 0807.3780.

[29]  V. Kravets,et al.  Super-narrow, extremely high quality collective plasmon resonances at telecom wavelengths and their application in a hybrid graphene-plasmonic modulator. , 2015, Nano letters.

[30]  Jonghwan Kim,et al.  Electrical control of optical plasmon resonance with graphene , 2013, CLEO: 2013.

[31]  T. Tang,et al.  Direct observation of a widely tunable bandgap in bilayer graphene , 2009, Nature.

[32]  Alexandra Boltasseva,et al.  Triangular metal wedges for subwavelength plasmon-polariton guiding at telecom wavelengths. , 2008, Optics express.

[33]  F. Xia,et al.  Graphene photodetectors for high-speed optical communications , 2010, 1009.4465.

[34]  K. Novoselov,et al.  Strong plasmonic enhancement of photovoltage in graphene. , 2011, Nature communications.

[35]  S. Bozhevolnyi,et al.  Organic nanofiber-loaded surface plasmon-polariton waveguides. , 2011, Optics express.

[36]  Yuyan Shao,et al.  Graphene Based Electrochemical Sensors and Biosensors: A Review , 2010 .

[37]  N. Peres,et al.  Fine Structure Constant Defines Visual Transparency of Graphene , 2008, Science.

[38]  A. Ferrari,et al.  Graphene Photonics and Optoelectroncs , 2010, CLEO 2012.

[39]  Rupert F. Oulton,et al.  Confinement and propagation characteristics of subwavelength plasmonic modes , 2008 .

[40]  Andrea Ferrari.  Graphene Photonics and Optoelectronics , 2016 .

[41]  D. Koller,et al.  Leakage radiation microscopy of surface plasmon polaritons , 2008, 1002.0725.

[42]  T. Taniguchi,et al.  Photoinduced doping in heterostructures of graphene and boron nitride. , 2014, Nature nanotechnology.

[43]  Yihong Wu,et al.  Hysteresis of electronic transport in graphene transistors. , 2010, ACS nano.