Excitation of surface plasmons and total absorption of light at the flat boundary between a metal and a uniaxial crystal

Depine, Ricardo A.; Gigli, Miriam L.

doi:10.1364/ol.20.002243

Cited by 20 publications

(9 citation statements)

References 4 publications

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“…Tuning the orientation of the dielectric tensor ellipsoid or its principal values was shown to allow tuning of the resonance location. It was shown recently [193,194] that it is possible to excite SP waves directly on the interface of a uniaxial medium and metal. Both TE and TM SP waves were shown to be possible with large sensitivity to the orientation of the optic axis.…”

Section: Laser and Photonics Reviewsmentioning

confidence: 99%

Sensitivity‐enhancement methods for surface plasmon sensors

Shalabney

Abdulhalim

2011

Laser & Photonics Reviews

450

254

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Surface plasmon resonance (SPR) sensors have been a mature technology for more than two decades now, however, recent investigations show continuous enhancement of their sensitivity and their lower detection limit. Together with the recent investigations in localized SPR phenomena, extraordinary optical transmission through nanoapertures in metals, and surface-enhanced spectroscopies, drastic developments are expected to revolutionize the field of optical biosensing. Sensitivity-enhancement (SE) techniques are reviewed focusing both on the physical transduction mechanisms and the system performance. In the majority of cases the SE is associated with the enhancement of the electromagnetic field overlap integral describing the interaction energy within the analyte. Other important mechanisms are the interaction between plasmons and excitons and between the analyte molecules and the metal surface. The lower detection limit can be reduced significantly if systems with high signal-to-noise ratio are used such as common-path interferometry, ellipsometry or polarimetry systems.

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Section: Laser and Photonics Reviewsmentioning

confidence: 99%

Sensitivity‐enhancement methods for surface plasmon sensors

Shalabney

Abdulhalim

2011

Laser & Photonics Reviews

450

254

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“…This choice should take into account the region in which each pole is located. Moreover, previous results for a single planar surface [23,24] show that this location is highly dependent on the orientation of the optic axis. For certain orientations we obtained values of the poles located in region I, which correspond to modes that cannot be excited when the incidence is from the crystal side.…”

Section: Eigenmodesmentioning

confidence: 73%

“…Previous studies on the modes of structures involving anisotropic media include [11±13] (at a single interface), [14] (the same con®guration as studied here, except that the optic axis of the crystal belongs to the interface, thus excluding double resonances), [15,16] (guided waves in anisotropic media), [17] (two ®lms), [18] (the same structure as considered here, but the study therein does not include double excitations), [19] (®rst observation of enhanced optical secondharmonic generation due to excitation of long-range surface plasmons at a multilayer structure), [20] (multilayered structure, but for a particular orientation of the principal dielectric tensor axes of the anisotropic layer), [21,22] (guided modes in a liquid-crystal layer and surface plasmon resonance in a metal-clad liquid-crystal waveguide respectively), [23,24] (excitation of surface modes at a single uniaxial crystal±metal interface) and [25±28] (examples of excitation at anisotropic gratings). Here we obtain the complex propagation constants of the eigenmodes supported by the uniaxial crystal±metal±isotropic medium ®lm and show the existence of a set of critical ®lm parameters for which the excitation is linked to zeros of the re¯ected power.…”

Section: Introductionmentioning

confidence: 99%

Excitation of eigenmodes at uniaxial crystal-metal-isotropic films

Gigli

Depine

1998

Journal of Modern Optics

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We perform a theoretical study about the interaction between light and the eigenmodes of a metallic ®lm that separates a uniaxial crystal from an isotropic medium. These structures support two di erent eigenmodes: a surface mode at the isotropic medium±metal interface and another mode at the crystal±metal interface. We show that, contrary to what happens in isotropic con®gurations, these two modes can couple to incident radiation without corrugating the surface or adding another interface. We give conditions to obtain zero re¯ected power and a strong enhancement of the ®elds at both interfaces. We also show that, owing to the di erent characteristics of the modes supported by each interface, the relative position of their propagation constants in the complex plane can be selected rather arbitrarily by tuning the ®lm parameters. We give examples in which both couplings occur for angles of incidence either very di erent (separate resonances) or very close (almost double resonances). In the latter case we observe the phenomenon of`reluctance' between resonances.

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“…Although the replacement of the isotropic dielectric material by an anisotropic dielectric material has been considered for over three decades [66,67], new understanding continues to emerge [68][69][70][71][72][73]. Equations (2) for the dielectric partnering material then have to be modified to…”

Section: Anisotropic Materialsmentioning

confidence: 99%

Surface electromagnetic waves: A review

Polo

Lakhtakia

2011

Laser & Photonics Reviews

180

107

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From the beginning of the 20th century, researchers have been interested in surface electromagnetic waves guided by planar interfaces of dissimilar mediums. Much initial research on surface-plasmon waves and surface-plasmonpolariton waves stemmed from theoretical curiosity, but the development of new experimental techniques propelled commercial exploitation for optical sensors of chemical and biological species. Additional surface waves called Dyakonov waves, Tamm waves, and Dyakonov-Tamm waves have emerged during the last 25 years. Experimental observation of Dyakonov waves was reported only in 2009, but the rapid development of experimental apparatus during the 1990s suggests that theoretical predictions will soon be evaluated experimentally, leading to further development of optical detection systems and optical circuitry.

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Excitation of surface plasmons and total absorption of light at the flat boundary between a metal and a uniaxial crystal

Cited by 20 publications

References 4 publications

Sensitivity‐enhancement methods for surface plasmon sensors

Sensitivity‐enhancement methods for surface plasmon sensors

Excitation of eigenmodes at uniaxial crystal-metal-isotropic films

Surface electromagnetic waves: A review

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