Intrinsic terahertz plasmon signatures in chemical vapour deposited graphene

Plasmonic resonance at terahertz (THz) frequencies can be achieved by gating graphene grown via chemical vapour deposition (CVD) to a high carrier concentration. THz time domain spectroscopy of such gated monolayer graphene shows resonance features around 1.6 THz, which appear as absorption peaks when the graphene is electrostatically p-doped and change to enhanced transmission when the graphene is n-doped. Superimposed on the Drude-like frequency response of graphene, these resonance features are related to the inherent poly-crystallinity of CVD graphene. An understanding of these features is necessary for the development of future THz optical elements based on CVD graphene.

[1]  B. Dlubak,et al.  The Parameter Space of Graphene Chemical Vapor Deposition on Polycrystalline Cu , 2012 .

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

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

[4]  Pinshane Y. Huang,et al.  Supplementary Materials for Tailoring Electrical Transport Across Grain Boundaries in Polycrystalline Graphene , 2012 .

[5]  Seung Jin Chae,et al.  Gate-controlled nonlinear conductivity of Dirac fermion in graphene field-effect transistors measured by terahertz time-domain spectroscopy. , 2012, Nano letters.

[6]  Shur,et al.  Shallow water analogy for a ballistic field effect transistor: New mechanism of plasma wave generation by dc current. , 1993, Physical review letters.

[7]  E. Pop,et al.  Mobility and Saturation Velocity in Graphene on SiO2 , 2010, 1005.2711.

[8]  Masayoshi Tonouchi,et al.  Terahertz and infrared spectroscopy of gated large-area graphene. , 2012, Nano letters.

[9]  I Gaponenko,et al.  Intrinsic terahertz plasmons and magnetoplasmons in large scale monolayer graphene. , 2012, Nano letters.

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

[11]  F. J. Garcia-Vidal,et al.  Surface plasmon enhanced absorption and suppressed transmission in periodic arrays of graphene ribbons , 2011, 1201.0191.

[12]  S. Sarma,et al.  Electronic transport in two-dimensional graphene , 2010, 1003.4731.

[13]  A. H. Castro Neto,et al.  Gate-tuning of graphene plasmons revealed by infrared nano-imaging , 2012, Nature.

[14]  L. Martín-Moreno,et al.  Scattering of graphene plasmons by defects in the graphene sheet. , 2013, ACS nano.

[15]  D. Jena,et al.  Broadband graphene terahertz modulators enabled by intraband transitions , 2012, Nature Communications.

[16]  S. Sarma,et al.  Dielectric function, screening, and plasmons in two-dimensional graphene , 2006, cond-mat/0610561.

[17]  D. A. Ritchie,et al.  Indirect Modulation of a Terahertz Quantum Cascade Laser Using Gate Tunable Graphene , 2012, IEEE Photonics Journal.

[18]  A. M. van der Zande,et al.  Chemical vapor deposition-derived graphene with electrical performance of exfoliated graphene. , 2012, Nano letters.

[19]  Michael S. Shur,et al.  Plasma Wave Electronics , 2003 .

[20]  A. Ferrari,et al.  Graphene field-effect transistors as room-temperature terahertz detectors. , 2012, Nature materials.

[21]  M. Soljavci'c,et al.  Plasmonics in graphene at infrared frequencies , 2009, 0910.2549.

[22]  V. Ryzhii.  Terahertz Plasma Waves in Gated Graphene Heterostructures , 2006 .