Analysis of the propagation of terahertz surface plasmon polaritons on semiconductor groove gratings

Kuttge, M.; Kurz, H.; Rivas, Jaime Gómez; Sánchez‐Gil, José A.; Bolívar, Peter Haring

doi:10.1063/1.2409895

Cited by 26 publications

(16 citation statements)

References 31 publications

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“…This is a serious deficiency, because SPP scattering effects are easier to detect when the SPP is launched obliquely, i.e., when its wave vector has a component along the slit axis. 7,8,[15][16][17][18] In this paper we fill this gap, presenting an analysis of the EM fields on the metal surface obliquely launched by a subwavelength one-dimensional aperture. Such a launching could be realized by illuminating a subwavelength slit in a thick metal film by a plane wave in the conical mount (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Oblique launching of optical surface waves by a subwavelength slit

2011

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The electromagnetic field on the metal surface launched by a subwavelength slit is analytically studied for the case when the fundamental mode inside the slit has a wave-vector component along the slit axis (conical mount). Both near-field and far-field regions are discussed, and the role of surface plasmon-polaritons and Norton waves is revealed. It is shown that the distance from the slit at which Norton waves are more intense than surface plasmons decreases with the parallel wave vector. Additionally, it is found that the s-polarization component, while present for any nonzero parallel wave vector, only weakly contributes to the Norton waves.

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Section: Introductionmentioning

confidence: 99%

Oblique launching of optical surface waves by a subwavelength slit

2011

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“…Note that this decay length is much shorter than the propagation length of SPPs on flat surfaces as it is mainly determined by the scattering of SPPs in the grooves defining the gratting. The SPP scattering strength depends on the size of the scatterers [22] and can be large in gratings with deep grooves as those used in our experiments, reducing significantly the SPP propagation length. No fitting parameters have been used in the calculations of Figs.…”

Section: Optical Measurementsmentioning

confidence: 99%

Local and anisotropic excitation of surface plasmon polaritons by semiconductor nanowires

Rümke¹,

Sánchez‐Gil²,

Muskens³

et al. 2008

Opt. Express

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers)Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract:We demonstrate a novel functionality of semiconductor nanowires as local sources for surface plasmon polaritons (SPPs). Photoexcited semiconductor nanowires decay non-radiatively exciting SPPs when they are on top of a metallic surface. We have investigated the anisotropic excitation of SPPs by nanowires by placing individual InP nanowires inside gold bullseye gratings. The gratings serve to couple SPPs to free space radiation that is detected with a scanning confocal microscope. The circular geometry of the grating allows to conclude that SPPs are preferentially generated in the direction along the nanowire axis.

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“…Since the semiconductor has a much lower permittivity than the metal at THz frequencies, it is more suitable for the excitation and confinement of THz SPPs modes. Enhanced transmission at THz frequencies has been observed in hole arrays and groove gratings, which are made from doped silicon or indium antimonide (InSb) [20][21][22][23][24][25]. In an external magnetic field, due to the cyclotron motion of the electrons in semiconductor, the cyclotron frequency of the doped semiconductor is tunable by changing the magnitude of the external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Surface Magnetoplasmon Modes in the Semiconductor Slit Waveguide at Terahertz Frequencies

Kong¹,

Li²,

Huang³

et al. 2008

PIER

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Abstract-The propagation properties of surface plasmon polaritons (SPP) modes and surface magnetoplasmon polaritons (SMP) modes in a semiconductor slit waveguide are analyzed by the effective dielectric constant approach, and the interaction of the external magnetic field with the dispersion properties and field distributions of SMP modes in the Voigt configuration are emphasized in our analysis. Both the symmetric structure and the asymmetric structure are discussed in details. In contrast to the SPP modes which have one propagation band below the plasmon frequency only, the SMP modes have both the low-frequency propagation band below the plasmon frequency and the high-frequency propagation band above the plasmon frequency. When the external magnetic field increases, the two bands of the SMP modes will separate further in frequency, and the even symmetric distribution of the fundamental mode, which usually associates with the SPP mode, will be destroyed. These results can provide some guidance for the design of the tunable semiconductor waveguide in the terahertz regime.

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Analysis of the propagation of terahertz surface plasmon polaritons on semiconductor groove gratings

Cited by 26 publications

References 31 publications

Oblique launching of optical surface waves by a subwavelength slit

Oblique launching of optical surface waves by a subwavelength slit

Local and anisotropic excitation of surface plasmon polaritons by semiconductor nanowires

Analysis of the Surface Magnetoplasmon Modes in the Semiconductor Slit Waveguide at Terahertz Frequencies

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