Analytical solution for the diffraction of an electromagnetic wave by a graphene grating

Slipchenko, T. M.; Nesterov, M. L.; Martín‐Moreno, Luis; Nikitin, Alexey Y.

doi:10.1088/2040-8978/15/11/114008

Cited by 60 publications

(51 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such coupling of radiation into graphene plasmons has already been shown both theoretically 27,28 and experimentally. 29 Alternatively, other works have shown coupling through relief corrugations or subwavelength gratings on which graphene is placed, [30][31][32][33][34] as well as patterned graphene structures including 1D arrays of micro-ribbons 13,35 and 2D arrangements of islands. 25,[36][37][38] In order to achieve a periodic doping in the graphene, the sheet can be biased with the spatially periodic electrostatic field generated by a periodically corrugated plane, either metallic or dielectric (see Fig.…”

Section: Graphene With 1d Conductivity Modulationmentioning

confidence: 99%

Graphene as a Tunable Anisotropic or Isotropic Plasmonic Metasurface

et al. 2016

View full text Add to dashboard Cite

We demonstrate a tunable plasmonic metasurface by considering a graphene sheet subject to a periodically patterned doping level. The unique optical properties of graphene result in electrically tunable plasmons that allow for extreme confinement of electromagnetic energy in the technologically significant regime of THz frequencies.Here we add an extra degree of freedom by using graphene as a metasurface, proposing to dope it with an electrical gate patterned in the micron or sub-micron scale. By extracting the effective conductivity of the sheet we characterize metasurfaces periodically modulated along one or two directions. In the first case, and making use of the analytical insight provided by transformation optics, we show an efficient control of THz radiation for one polarization. In the second case, we demonstrate a metasurface with an isotropic response that is independent of wave polarization and orientation.Graphene, an atomically-thin layer of carbon atoms arranged in a honeycomb lattice, features outstanding mechanical, thermal and electrical properties. 1 Its characteristic linear * To whom correspondence should be addressed 1 dispersion for electrons close to the Dirac point results in the possibility of tuning the carrier concentration by external means. 2 In particular, graphene can be biased by electrical gating or surface doping, which modifies its Fermi level and permits the existence of surface plasmons propagating along graphene. Because of the two-dimensional (2D) nature of this material, the surface plasmons it supports have very short wavelengths and exhibit extreme out-of-plane confinement to the sheet, as has already been demonstrated in a number of experiments. [3][4][5][6][7][8][9][10][11] Compared to the noble metals commonly employed for plasmonics, 12 graphene has a low carrier concentration, and, for this reason, plasmons in graphene are relatively long-lived and appear at lower frequencies. While the plasmonic response of metals is weak at the infrared or lower frequencies, graphene plasmons exist in the THz regime with relatively low losses. 13-15 These facts, added to the important ingredient of tunability, make graphene a very suitable platform for the design of plasmonic metasurfaces in the THz regime. 16,17 Metasurfaces, the 2D counterpart of metamaterials, 18,19 consist of a planar arrangement of resonant subwavelength-sized building blocks. 20 By appropriately designing the blocks and their arrangement, metasurfaces provide an ultra-thin platform for manipulating electromagnetic (EM) waves. Novel phenomena and applications based on metasurfaces range from broadband light bending and anomalous reflection and refraction 21-23 to strong spin-orbit interactions of light. 24In this work, we study graphene as a plasmonic metasurface that offers the potential to control radiation in the THz regime. Different from previous studies, 16,17 which focused on patterning the graphene, here we consider a continuous graphene sheet with periodically modulated doping. This gives rise ...

show abstract

Section: Graphene With 1d Conductivity Modulationmentioning

confidence: 99%

Graphene as a Tunable Anisotropic or Isotropic Plasmonic Metasurface

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Graphene patch arrays of cross shapes [16] and square shapes [17] have also been demonstrated for absorption enhancement. In addition, graphene can be used together with other structures, such as gratings and photonic crystals to enhance its absorption [18][19][20][21][22][23][24][25]. For example, Gao et al [26] and Zhan et al [27] utilized a dielectric surface-relief grating to excite the surface plasmon wave in graphene, which also enhanced graphene absorption.…”

Section: Introductionmentioning

confidence: 99%

Resonance enhanced absorption in a graphene monolayer using deep metal gratings

Zhao

Zhang

2015

J. Opt. Soc. Am. B

View full text Add to dashboard Cite

It has been demonstrated recently that metal gratings can significantly improve the near-infrared absorptance of graphene from 0.023 to nearly 0.70 because of the excitation of magnetic polaritons (MPs). In the present study, it is shown that the absorptance of graphene can be further enhanced to more than 0.80 by surface plasmon polaritons (SPPs) enabled by the grating. Meanwhile, graphene behaves as a sheet resistor that is able to boost the absorption when MPs or SPPs are excited without changing their resonance frequencies or dispersion relations. The effects of higher-order MPs, as well as the grating geometry on the enhanced absorptance, are also examined. Rigorous coupled-wave analysis (RCWA) is employed to calculate the radiative properties and power dissipation density in both the graphene and the metal grating. This study will facilitate the understanding of the coupling phenomena between graphene and nanostructures and may also benefit the design of next-generation graphenebased optical and optoelectronic devices.

show abstract

“…In this paper, we suggest and study analytically an approach for the second-harmonic (SH) generation in double-layer graphene waveguides taking advantage of the possibility to modulate spatially the conductivity of one of the graphene layers by doping or electrostatic gating [16][17][18] thus assisting the coupling of freely propagating light to plasmons in graphene [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Second-harmonic generation in subwavelength graphene waveguides

Kivshar

2014

Phys. Rev. B

View full text Add to dashboard Cite

We suggest a novel approach for generating second-harmonic radiation in subwavelength graphene waveguides. We demonstrate that quadratic phase matching between the plasmonic guided modes of different symmetries can be achieved in a planar double-layer geometry when conductivity of one of the layers becomes spatially modulated. We predict theoretically that, owing to graphene nonlocal conductivity, the second-order nonlinear processes can be actualized for interacting plasmonic modes with an effective grating coupler to allow external pumping of the structure and output of the radiation at the double frequency.Comment: 5 pages, 3 figure

show abstract

Analytical solution for the diffraction of an electromagnetic wave by a graphene grating

Cited by 60 publications

References 30 publications

Graphene as a Tunable Anisotropic or Isotropic Plasmonic Metasurface

Graphene as a Tunable Anisotropic or Isotropic Plasmonic Metasurface

Resonance enhanced absorption in a graphene monolayer using deep metal gratings

Second-harmonic generation in subwavelength graphene waveguides

Contact Info

Product

Resources

About