Grating-coupled excitation of the Uller–Zenneck surface wave in the optical regime

Faryad, Muhammad; Lakhtakia, Akhlesh

doi:10.1364/josab.31.001706

Cited by 11 publications

(17 citation statements)

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“…Electromagnetically, both problems are the same since one partnering material is almost lossless and the other is lossy. The surface waves guided by the interface of a lossy and a lossless dielectric material are thus called Uller-Zenneck waves [6].…”

Section: Introductionmentioning

confidence: 99%

“…The major hurdle was the absence of a conclusive experimental proof that UllerZenneck waves can be excited, even though the theory arXiv:1712.06573v1 [physics.optics] 18 Dec 2017 was rigorously established by Sommerfeld after Uller and Zenneck [8][9][10]. In the optical regime, it has recently been shown that the Uller-Zenneck waves could not be conclusively excited at the single planar interface of a lossless and a lossy dielectric material in a prism-coupled configuration [6]. However, it was theoretically shown that a surface-relief grating can excite the Uller-Zenneck waves [6].…”

Section: Introductionmentioning

confidence: 99%

“…In the optical regime, it has recently been shown that the Uller-Zenneck waves could not be conclusively excited at the single planar interface of a lossless and a lossy dielectric material in a prism-coupled configuration [6]. However, it was theoretically shown that a surface-relief grating can excite the Uller-Zenneck waves [6]. Therefore, the first successful and unambiguous excitation of the Uller-Zenneck surface waves was accomplished using a surface-relief grating in the optical regime [11].…”

Section: Introductionmentioning

confidence: 99%

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Excitation of the Uller-Zenneck electromagnetic surface waves in the prism-coupled configuration

Rasheed

Faryad

2017

Phys. Rev. A

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A configuration to excite the Uller-Zenneck surface electromagnetic waves at the planar interfaces of homogeneous and isotropic dielectric materials is proposed and theoretically analyzed. The UllerZenneck waves are surface waves that can exist at the planar interface of two dissimilar dielectric materials of which at least one is a lossy dielectric material. In this work, a slab of a lossy dielectric material was taken with lossless dielectric materials on both sides. A canonical boundary-value problem was set up and solved to find the possible Uller-Zenneck waves and waveguide modes. The Uller-Zenneck waves guided by the slab of the lossy dielectric material were found to be either symmetric or anti-symmetric that transmuted into waveguide modes when the thickness of that slab was increased. A prism-coupled configuration was then successfully devised to excite the UllerZenneck waves. The results showed that the Uller-Zenneck waves are excited at the same angle of incidence for any thickness of the slab of the lossy dielectric material, whereas the waveguide modes can be excited when the slab is sufficiently thick. The excitation of Uller-Zenneck waves at the planar interfaces with homogeneous and all-dielectric materials can usher new avenues for the applications for electromagnetic surface waves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Excitation of the Uller-Zenneck electromagnetic surface waves in the prism-coupled configuration

Rasheed

Faryad

2017

Phys. Rev. A

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“…This ambiguity is, in part, due to the requirement of grazingangle incidence for the exciting plane wave, which makes the differentiation between the surface wave and the ground wave very difficult [7,9]. The same ambiguity will prevail in other spectral regimes.…”

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confidence: 99%

“…The same ambiguity will prevail in other spectral regimes. However, if the guiding interface were to be periodically corrugated, theory has recently shown [9] that unambiguous proof could be experimentally obtained. As periodically corrugated interfaces are easily fabricated [10] for operation as diffraction gratings in the optical regime, we decided to experimentally confirm the existence of the Uller-Zenneck wave in this regime using a one-dimensional grating written by electron-beam lithography on a wafer of crystalline silicon.…”

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confidence: 99%

Observation of the Uller–Zenneck wave

Faryad

Lakhtakia

2014

Opt. Lett.

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The Uller-Zenneck wave has been theoretically predicted to exist at the planar interface of two homogeneous dielectric materials of which only one must be dissipative. Experimental confirmation of this century-old prediction was obtained experimentally by exciting the Uller-Zenneck wave as a Floquet harmonic of nonzero order at the periodically corrugated interface of air and crystalline silicon in the 400-to-900-nm spectral regime. Application for intrachip optical interconnects at 850 nm appears promising.

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Near-Field Surface Waves in Few-Layer MoS₂

Babicheva

Gamage

et al. 2018

ACS Photonics

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Recently emerged layered transition metal dichalcogenides have attracted great interest due to their intriguing fundamental physical properties and potential applications in optoelectronics. Using scattering-type scanning near-field optical microscope (s-SNOM) and theoretical modeling, we study propagating surface waves in the visible spectral range that are excited at sharp edges of layered transition metal dichalcogenides (TMDC) such as molybdenum disulfide and tungsten diselenide. These surface waves form fringes in s-SNOM measurements. By measuring how the fringes change when the sample is rotated with respect to the incident beam, we obtain evidence that exfoliated MoS2 on a silicon substrate supports two types of Zenneck surface waves that are predicted to exist in materials with large real and imaginary parts of the permittivity. In addition to conventional Zenneck surface waves guided along one interface, we introduce another Zenneck-type mode that exists in multilayer structures with large dissipation. We have compared MoS2 interference fringes with those formed on a layered insulator such as hexagonal boron nitride where the small permittivity supports only leaky modes. The interpretation of our experimental data is supported by theoretical analysis. Our results could pave the way to the investigation of surface waves on TMDCs and other van der Waals materials and their novel photonics applications.

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Grating-coupled excitation of the Uller–Zenneck surface wave in the optical regime

Cited by 11 publications

References 20 publications

Excitation of the Uller-Zenneck electromagnetic surface waves in the prism-coupled configuration

Excitation of the Uller-Zenneck electromagnetic surface waves in the prism-coupled configuration

Observation of the Uller–Zenneck wave

Near-Field Surface Waves in Few-Layer MoS₂

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Grating-coupled excitation of the Uller–Zenneck surface wave in the optical regime

Cited by 11 publications

References 20 publications

Excitation of the Uller-Zenneck electromagnetic surface waves in the prism-coupled configuration

Excitation of the Uller-Zenneck electromagnetic surface waves in the prism-coupled configuration

Observation of the Uller–Zenneck wave

Near-Field Surface Waves in Few-Layer MoS2

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Product

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Near-Field Surface Waves in Few-Layer MoS₂