Scattering of surface plasmon polaritons by one-dimensional inhomogeneities

Nikitin, Alexey Y.; López-Tejeira, F.; Martín‐Moreno, Luis

doi:10.1103/physrevb.75.035129

Cited by 54 publications

(54 citation statements)

References 37 publications

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“…Such similarity is explainable in the approximate framework presented in Ref. 22, which turns out to be quite acceptable in this limit of elongated defects, as we shall substantiate in Sec. VII.…”

Section: Numerical Resultssupporting

confidence: 76%

“…This result is not in agreement with those obtained in the approximate treatment of Ref. 22. We associate the discrepancy with the breakdown of the condition that the curvature of a short and shallow defect does not vary rapidly, used in that work.…”

Section: Numerical Resultscontrasting

confidence: 69%

“…VII we look at the solutions for the case of shallow and long defects, and we present a clear-cut interpretation to support the results of the previous treatment. 22 Finally in Sec. VIII we explain qualitatively that the aspect ratio of the defect determines the orientation of the field induced in a shallow defect.…”

Section: Introductionmentioning

confidence: 93%

“…It must be noted that in a previous work we presented such a comparison 22 but within an approximate numerical scheme. Within that framework it was found that ridges and grooves exhibited the same scattering, whenever they were shallow enough.…”

Section: Introductionmentioning

confidence: 99%

“…The mistaken outcome of Ref. 22 for short defects may be traced back to the breakdown of the assumption of small curvature in the defect geometry that was made there.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of surface plasmon scattering by shallow ridges and grooves

Brucoli

Martín‐Moreno

2011

Phys. Rev. B

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We revisit the scattering of surface plasmons by shallow surface defects for both protrusions and indentations of various lengths, which are deemed infinite in one dimension parallel to the surface. Subwavelength protrusions and indentations of equal shape present different scattering coefficients when their height and width are comparable. In this case, a protrusion scatters plasmons like a vertical point dipole on a metal surface, while an indentation scatters like a horizontal point dipole on a metal surface. We corroborate that long and shallow asymmetrically shaped surface defects have very similar scattering coefficients, as already found with approximate methods. In the transition from short shallow scatterers to long shallow scatterers, the radiation can be understood in terms of interference between a vertical and a horizontal dipole. The results attained numerically are exact and accounted for with analytical models.

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Section: Numerical Resultssupporting

confidence: 76%

Section: Numerical Resultscontrasting

confidence: 69%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

“…The mistaken outcome of Ref. 22 for short defects may be traced back to the breakdown of the assumption of small curvature in the defect geometry that was made there.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of surface plasmon scattering by shallow ridges and grooves

Brucoli

Martín‐Moreno

2011

Phys. Rev. B

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Efficient and Tunable Reflection of Phonon Polaritons at Built‐In Intercalation Interfaces

Dong

et al. 2021

Advanced Materials

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Phonon polaritons—light coupled to lattice vibrations—in polar van der Waals crystals offer unprecedented opportunities for controlling light at the nanoscale due to their anisotropic and ultralow‐loss propagation. While their analog plasmon polaritons—light coupled to electron oscillations—have long been studied and exhibit interesting reflections at geometrical edges and electronic boundaries, whether phonon polaritons can be reflected by such barriers has been elusive. Here, the effective and tunable reflection of phonon polaritons at embedded interfaces formed in hydrogen‐intercalated α‐MoO3 flakes is elaborated upon. Without breaking geometrical continuity, such intercalation interfaces can reflect phonon polaritons with low losses, yielding the distinct phase changes of −0.8π and −0.3π associated with polariton propagation, high efficiency of 50%, and potential electrical tunability. The results point to a new approach to construct on‐demand polariton reflectors, phase modulators, and retarders, which may be transplanted into building future polaritonic circuits using van der Waals crystals.

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Compact surface structures for the efficient excitation of surface plasmon‐polaritons

Cruz

Mendez

Macı́as

et al. 2012

Physica Status Solidi (b)

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International audienceWe present calculations of the efficiency of excitation of surface plasmon-polaritons (SPPs) with surface structures illuminated by focussed beams. First, it is shown that the low reflectivity observed with broad highly directional beams and periodic gratings does not necessarily imply an efficient coupling to SPPs. We then consider the coupling through surface features like steps, grooves and angled steps, and calculate efficiency maps for these structures as functions of the parameters that define them. Finally, we explore the possibilities of improving the coupling efficiency using periodic structures consisting of a small number of rectangular grooves. We find that a surface section with a length of about four wavelengths can couple as much as 45% of the incident light into a directional SPP. 1 Introduction Surface plasmon-polaritons (SPPs) are surface electromagnetic modes that take the form of surface traveling waves at the boundaries between metals and dielectrics. Although their basic properties have been known for some time, their importance for nano-photonic applications has produced a renewed interest on the subject. Several reviews of their properties and potential uses can be found in the literature [1–5]. Since the real part of their wavenumber is larger than that of light in vacuum (v/c), SPPs cannot be excited directly by volume waves propagating in vacuum. The classical methods of exciting SPPs include diffraction gratings [6, 7], and the Otto and Kretschmann configurations [1]. These methods are well-suited to the use of broad, highly collimated beams, but their implementation can be problematic in confined or miniaturized spaces. Techniques based on the interaction of highly focussed beams with sharp surface features or defects are commonly used in such situations. The efficient launching of SPPs in small spaces is essential for the development of surface plasmon photonic circuits. Not surprisingly, the coupling efficiency of SPP, defined as the ratio of the power in the excited SPP and the power of the incident beam, has received some attention i

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Scattering of surface plasmon polaritons by one-dimensional inhomogeneities

Cited by 54 publications

References 37 publications

Comparative study of surface plasmon scattering by shallow ridges and grooves

Comparative study of surface plasmon scattering by shallow ridges and grooves

Efficient and Tunable Reflection of Phonon Polaritons at Built‐In Intercalation Interfaces

Compact surface structures for the efficient excitation of surface plasmon‐polaritons

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