Spontaneous emission in plasmonic graphene subwavelength wires of arbitrary sections

Cuevas, Mauro

doi:10.1016/j.jqsrt.2017.11.009

Cited by 15 publications

(18 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, as we have verified, the ASP and SSP contributions dominate the energy transfer process on the frequency region presented in Figure 3 (where the SPs are well defined) and consequently the WG contributions can be neglected in Eq. (23). Since the imaginary part of the graphene conductivity (see Appendix C) Imσ changes sign from positive to negative at ω/µ c ≈ 1.667, due to the presence of the interband term in the conductivity, p-polarized SPs are well defined on the frequency range below such frequency.…”

Section: Resultsmentioning

confidence: 99%

Spatial modulation of the electromagnetic energy transfer by excitation of graphene waveguide surface plasmons

Olivo

Zapata–Rodríguez

Cuevas

2019

J. Opt.

Self Cite

View full text Add to dashboard Cite

We theoretically study the electromagnetic energy transfer between donor and acceptor molecules near a graphene waveguide. The surface plasmons (SPs) supported by the structure provide decay channels which lead to an improvement in the energy transfer rate when the donor and acceptor are localized on the same side or even on opposite sides of the waveguide. The modification of the energy transfer rate compared to its value in absence of the waveguide are calculated by deforming the integration path into a suitable path in the complex plane. Our results show that this modification is dramatically enhanced when the symmetric and antisymmetric SPs are excited. Notable effects on the spatial dependence of the energy transfer due to the coherent interference between these SP channels, which can be tuned by chemical potential variations, are highlighted and discussed in terms of SP propagation characteristics.

show abstract

Section: Resultsmentioning

confidence: 99%

Spatial modulation of the electromagnetic energy transfer by excitation of graphene waveguide surface plasmons

Olivo

Zapata–Rodríguez

Cuevas

2019

J. Opt.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The coupled integral equations (9)-(10), or Eq. (11) in case of the single wire system, are converted into matrix equations which are solved numerically (see [44] and references therein). Once the functions ϕ 1 ( r j ) and ∂ ϕ1( rj ) ∂nj are determined, the scattered field, given by the first of Eqs.…”

Section: Surface Integral Equations Of the Electromagnetic Field Scatmentioning

confidence: 99%

“…is the total power radiated by an electric dipole in the unbounded medium 1 [44,45]. By using the Ampere-Maxwell equation the relation between the components of the electric field and the z-component of the magnetic field is derived,…”

Section: Emitted and Radiated Powersmentioning

confidence: 99%

Theoretical investigation of the spontaneous emission on graphene plasmonic antenna in THz regime

Cuevas

2018

Superlattices and Microstructures

Self Cite

View full text Add to dashboard Cite

The present work deals with a theoretical research on the emission and radiation properties of a dipole emitter source close to a dimer graphene plasmonic antenna. Modification of the radiation and the quantum efficiencies resulting from varying the position of the emitter and the orientation of its dipole moment are calculated by using a rigorous electromagnetic method based on Green's second identity. Large enhancements in the emission and the radiation of the emitter occur due to the coupling with the antenna surface plasmons in the spectral region from ≈ 4THz to ≈ 15THz. Our results show that the radiation efficiency can be enhanced by four orders of magnitude and that the quantum efficiency reaches values close to 0.8 when the emission frequency coincides with one of the resonant dipolar frequencies. On the other hand, these quantities can be reduced in a great measure at a specific frequency for a given emitter location. We present calculations of the near-field distribution and the far field intensity which reveal the role of the plasmonic antenna resonance in the emitter enhanced radiation. We show that the spectral region where the radiation is enhanced can be chosen over a wide range by varying the chemical potential of graphene from 0.2eV to 1eV.

show abstract

“…We also provided analytical expressions for the scattered power when the graphene elliptical wire is excited by a plane wave. All scattering curves are compared with those obtained by applying a rigorous formalism based in the Green surface integral method [35,36] valid for arbitrary shaped cross sections.…”

Section: Introductionmentioning

confidence: 99%

Dispersion properties of plasmonic sub-wavelength elliptical wires wrapped with graphene

Cuevas,

Depine

2021

Preprint

Self Cite

View full text Add to dashboard Cite

One fundamental motivation to know the dispersive, or frequency dependent characteristics of localized surface plasmos (LSPs) supported by elliptical shaped particles wrapped with graphene sheet, as well as their scattering characteristics when these elliptical LSPs are excited, is related with the design of plasmonic structures capable to manipulate light at sub-wavelength scale. The anisotropy imposed by the ellipse eccentricity can be used as a geometrical tool for controlling plasmonic resonances. Unlike metallic case, where the multipolar eigenmodes are independent of each others, we find that the induced current on graphene boundary couples multipolar eigenmodes with the same parity. In the long wavelength limit, a recursive relation equation for LSPs in term of the ellipse eccentricity parameter is derived and explicit solutions at lowest order are presented. In this approximation, we obtain analytical expressions for both the anisotropic polarizability tensor elements and the scattered power when LSPs are excited by plane wave incidence.

show abstract

Spontaneous emission in plasmonic graphene subwavelength wires of arbitrary sections

Cited by 15 publications

References 39 publications

Spatial modulation of the electromagnetic energy transfer by excitation of graphene waveguide surface plasmons

Spatial modulation of the electromagnetic energy transfer by excitation of graphene waveguide surface plasmons

Theoretical investigation of the spontaneous emission on graphene plasmonic antenna in THz regime

Dispersion properties of plasmonic sub-wavelength elliptical wires wrapped with graphene

Contact Info

Product

Resources

About