Bifacial Metasurface with Quadrupole Optical Response

Shevchenko, Andriy; Kivijärvi, Ville; Grahn, Patrick; Kaivola, Matti; Lindfors, Klas

doi:10.1103/physrevapplied.4.024019

Cited by 21 publications

(11 citation statements)

References 45 publications

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“…Note that, if the material is centrosymmetric and has a symmetry axis along the surface normal, we have t f = t b and r f = r b . For non-centrosymmetric materials, the latter equality does not hold even at normal incidence [5,7,21]. Similar equations have been derived previously by considering interference of plane waves reflected and transmitted by monomolecular layers in a metamaterial for TEand TM-polarized waves assumed to be transverse in both E and H [5,7].…”

Section: Wave Parameters From Tangential Reflection and Transmission supporting

confidence: 57%

Optical wave parameters for spatially dispersive and anisotropic nanomaterials

et al. 2017

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Section: Wave Parameters From Tangential Reflection and Transmission supporting

confidence: 57%

Optical wave parameters for spatially dispersive and anisotropic nanomaterials

et al. 2017

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“…in Refs. ). Also, these works referred only to regular arrays – possible randomness of the metasurfaces was not analyzed.…”

Section: Introductionmentioning

confidence: 97%

Electromagnetic characterization of bianisotropic metasurfaces on refractive substrates: General theoretical framework

2016

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We present a general methodology for electromagnetic homogenization and characterization of bianisotropic metasurfaces formed by regular or random arrangements of small arbitrary inclusions at the interface of two different isotropic media. These topologies can provide the most general electric and magnetic surface-bound dipolar responses to incident electromagnetic waves. The approach unites and generalizes the earlier theories developed independently by two research groups: the joint group of profs. Holloway and Kuester and the joint group of profs. Simovski and Tretyakov. We demonstrate the use of both formalisms in several example cases and discuss the differences between the two approaches. Furthermore, we generalize the known theories for the bianisotropic metasurfaces located at interfaces between two different media or on a substrate. The generalized framework allows characterization of both periodical or amorphous metasurfaces. The developed analytical theory can be used in the analysis and synthesis of metasurfaces for a wide variety of applications.

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“…Figure 7(a) shows the refractive index spectrum for a wave propagating along the z axis. The spectrum exhibits two resonances due to dipole and quadrupole excitations in the metamolecules [15,23,24]. Figure 7(b) shows the impedance spectrum.…”

Section: Examplesmentioning

confidence: 99%

Fluorescence enhancement and nonreciprocal transmission of light waves by nanomaterial interfaces

2017

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In an optically absorbing or amplifying linear medium, the energy flow density of interfering optical waves is in general periodically modulated in space. This makes the wave transmission through a material boundary, as described by the Fresnel transmission coefficients, nonreciprocal and apparently violating the energy conservation law. The modulation has been previously described in connection to ordinary homogeneous nonmagnetic materials. In this work, we extend the description to nanomaterials with designed structural units that can be magnetic at optical frequencies. We find that in such a "metamaterial" the modulation in energy flow can be used to enhance optical far-field emission in spite of the fact that the material is highly absorbing. We also demonstrate a nanomaterial design that absorbs light, but simultaneously eliminates the power flow modulation and returns the reciprocity, which is impossible to achieve with a nonmagnetic material. We anticipate that these unusual optical effects can be used to increase the efficiency of nanostructured light emitters and absorbers, such as light-emitting diodes and solar cells.

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Bifacial Metasurface with Quadrupole Optical Response

Cited by 21 publications

References 45 publications

Optical wave parameters for spatially dispersive and anisotropic nanomaterials

Optical wave parameters for spatially dispersive and anisotropic nanomaterials

Electromagnetic characterization of bianisotropic metasurfaces on refractive substrates: General theoretical framework

Fluorescence enhancement and nonreciprocal transmission of light waves by nanomaterial interfaces

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