Surface-plasmon-enhanced transmission through metallic gratings

Schröter, Ursula; Heitmann, D.

doi:10.1103/physrevb.58.15419

Cited by 307 publications

(203 citation statements)

References 17 publications

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“…These sharp phase shifts are responsible for the strong dependence on u of the extraordinary transmission for l ഠ L. Thus, within the scope of the model, the strong dependence on u of the resonance peak close to l ഠ L for u 0, which is attributed to SP in Refs. [1,4,5,7], is understood as a pure diffraction effect associated with a redistribution of energy and phase among several diffraction orders. As a consequence, it is appropriate to invoke surface currents, rather than SP, as the general mechanism responsible for the extraordinary transmission.…”

Section: -1mentioning

confidence: 99%

“…This surprising discovery has attracted much interest in both the physics [3][4][5][6][7][8][9] and the potential numerous applications [10][11][12] in optics and photonics. With the exception of the work by Treacy [3], it is generally admitted that the extraordinary transmission is mainly due to the excitation of coupled surface plasmons (SP) on the upper and lower interfaces of the metal grating for twodimensional [1,[7][8][9] and one-dimensional structures [4][5][6][7].…”

Section: Negative Role Of Surface Plasmons In the Transmission Of Metmentioning

confidence: 99%

“…Obviously, classical metallic gratings such as those studied in Refs. [3][4][5][6][7] correspond to the special case of 1 ´2. In Fig.…”

Section: Negative Role Of Surface Plasmons In the Transmission Of Metmentioning

confidence: 99%

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Negative Role of Surface Plasmons in the Transmission of Metallic Gratings with Very Narrow Slits

2002

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Section: -1mentioning

confidence: 99%

Section: Negative Role Of Surface Plasmons In the Transmission Of Metmentioning

confidence: 99%

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Negative Role of Surface Plasmons in the Transmission of Metallic Gratings with Very Narrow Slits

2002

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“…1,2, 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39 ). In the last few years, a great number of studies have been devoted to the nanostructures in metal films, namely a single aperture, a grating of apertures and an aperture surrounded by grooves.…”

Section: Introductionmentioning

confidence: 99%

“…10,13,14,15 In the case of films, whose thickness are too small to support the intra-cavity resonance, the extraordinary transmission can be caused by another mechanism, the generation of resonant surface plasmon polaritons and coupling of them into radiation. 4,9,11,16,22 Both physical mechanisms play important roles in the extraordinary transmission through arrays of two-side-open slits (transmission gratings) and the resonant reflection by arrays of oneside-open slits (reflection gratings). A model of trapped (waveguide) modes has been recently used to show that an array of two-side-open slits can operate like a reflection grating totally reflecting TE-polarized light.…”

Section: Introductionmentioning

confidence: 99%

Resonant backward scattering of light by a subwavelength metallic slit with two open sides

et al. 2005

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The backward scattering of TM-polarized light by a two-side-open subwavelength slit in a metal film is analyzed. We show that the reflection coefficient versus wavelength possesses a Fabry-Perotlike dependence that is similar to the anomalous behavior of transmission reported in the study [Y. Takakura, Phys. Rev. Lett. 86, 5601 (2001)]. The open slit totally reflects the light at the near-to-resonance wavelengths. In addition, we show that the interference of incident and resonantly backward-scattered light produces in the near-field diffraction zone a spatially localized wave whose intensity is 10-10 3 times greater than the incident wave, but one order of magnitude smaller than the intra-cavity intensity. The amplitude and phase of the resonant wave at the slit entrance and exit are different from that of a Fabry-Perot cavity.

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Beyond the Bethe Limit: Tunable Enhanced Light Transmission Through a Single Sub-Wavelength Aperture

Grupp¹,

Lezec²,

Thio³

et al. 1999

Adv. Mater.

129

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Since the advent of diffraction gratings in the last century, it has long been apparent that new physics and novel applications can arise from the ability to control structures on the scale of the wavelength of light. [1±7] Present nanofabrication technology allows the construction of artificial structures in a controlled way, leading to novel, and sometimes surprising, material properties. Recently we showed that a two-dimensional crystal of holes in a metallic film overcomes the fundamental constraint of low transmittance of apertures smaller than the wavelength of light. [8,9] Through the lattice of holes, the photons couple resonantly to surface plasmons (SPs)Ðcoherent collective excitations of electrons at a metal surface [10] Ðleading to an optical transmittance at well-defined wavelengths which exceeds by orders of magnitude what would be expected from extrapolating for a single hole from Bethe's theory. [11] The transmittance enhancement has recently been confirmed by numerical simulations. [12] In those lattices, there were literally millions of holes. [8,9] Ultimately, it would be much more practical if one could achieve the same control (wavelength selectivity and enhanced transmittance) in a single aperture. One possible approach would be to create a periodic structure on the metal surface to couple the light to the SPs, and then add a hole or set of holes, and determine whether these will transmit the SP-coupled light. For this scheme to work it is imperative that the periodic surface features do not themselves emit light. This is far from obvious since it is well known from SP studies [3,10] that surface roughness induces radiative decay of SPs. We demonstrate here that this is indeed possible: Even a single sub-wavelength hole, if surrounded by periodic surface corrugation, shows as large a transmittance enhancement as an array of holes. In addition, the transmission can be tuned to a given wavelength by the proper design of the 2D lattice. We also clarify other aspects of this rich phenomenon.To study the transmission properties of hole lattices on which are superimposed lattices of surface indentations, silver metal films (thickness t » 300 to 500 nm) were prepared on a quartz surface after which holes and indentations (radius r » 150 nm) were milled in the film using a focused ion beam (FIB) (Micrion System 9500, 50 keV Ga ions, 5 nm nominal spot diameter). The periodic surface modulation consists of an array of circular indentations, or dimples, that penetrate no more than halfway through the film. The surface plasmon skin depth being about 20 nm, [10] the two surfaces are well-isolated from each other, including in the indentations.To determine if it is possible to modify the transmission spectrum by introducing a periodic surface structure, we first fabricated the simplest configuration consisting of a square array of surface indentations with a period P i = 0.5 mm in which every other indentation is milled through the film to produce a hole. In other words, the holes have a period P h = 1.0...

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Surface-plasmon-enhanced transmission through metallic gratings

Cited by 307 publications

References 17 publications

Negative Role of Surface Plasmons in the Transmission of Metallic Gratings with Very Narrow Slits

Negative Role of Surface Plasmons in the Transmission of Metallic Gratings with Very Narrow Slits

Resonant backward scattering of light by a subwavelength metallic slit with two open sides

Beyond the Bethe Limit: Tunable Enhanced Light Transmission Through a Single Sub-Wavelength Aperture

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