Excitation of Multiple Surface Plasmon-Polaritons by a Metal Layer Inserted in an Equichiral Sculptured Thin Film

Hosseininezhad, S. H.; Babaei, Ferydon

doi:10.1007/s11468-018-0701-y

Cited by 7 publications

(7 citation statements)

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“…With the emergence of the new generation of thin films called sculptured thin films (STFs), the studies on SPP excitation at the interface of metal and anisotropic dielectric has increased [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Excitation of Surface Plasmon-Polariton Wave at Both Interfaces of a Silver Thin Film in Two-Layer Kretschmann Geometry

Babaei

Seyyedi

2021

Plasmonics

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In this work, a TiO2-Ag composite structure was fabricated by combination of physical vapor deposition and oblique angle deposition. The nanostructure of the TiO2 columnar thin film was analyzed using the field emission scanning electron microscopy. The excitation of the surface plasmon-polariton waves was studied using an optical setup that is called the two-layer Kretschman geometry. The results showed that two surface plasmon-polariton modes are propagated for TiO2 dielectric thin film at oblique deposition that they are related to metal-air and TiO2 -metal interfaces.The surface plasmon-polariton modes were more localized on interfaces at glancing angles of incident flux vapor. In normal incident of flux vapor only one surface plasmon-polariton mode can be excited at interface of metal-air. The results of this research may be applied in simultaneous sensing of the different molecules, chemical species and nanoparticles with different sizes.

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Section: Introductionmentioning

confidence: 99%

Excitation of Surface Plasmon-Polariton Wave at Both Interfaces of a Silver Thin Film in Two-Layer Kretschmann Geometry

Babaei

Seyyedi

2021

Plasmonics

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“…[1] may well be attributable to cavity resonances (and/or other mechanisms) but not to SPPWs as claimed in that paper. As a representative counterexample, many absorptance peaks of magnitude greater than 0.4 were reported in Ref.…”

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confidence: 56%

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AbstractIn a recent study published in this journal, in which surface waves were investigated numerically for a certain equichiral thin film, the criterion used to determine whether or not surface waves were excited is not adequately discriminating.Keywords Surface-plasmon-polariton wave · Dispersion relation · Cavity resonance In a recent study, the prism-coupled excitation of surfaceplasmon-polariton waves (SPPWs) was investigated numerically for the interface of a metal and an equichiral thin film (ETF) [1]. Since the constitutive properties of the ETF under investigation varied periodically in the direction of the ETF's thickness, more than one SPPW could be excited at a given wavelength by changing the direction of the incident light.

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confidence: 99%

“…The wavenumbers for cavity resonances do not arise as roots of the dispersion relation for SPPWs. Furthermore, cavity resonances are highly sensitive to the thickness of the thin film in the prism-coupled Tom G. Mackay T.Mackay@ed.ac.uk 1 School of Mathematics and Maxwell Institute for Mathematical Sciences, University of Edinburgh, Edinburgh EH9 3FD, UK configuration, whereas SPPWs are not when the thin film's thickness is greater than a certain threshold [3,4].…”

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confidence: 99%

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On the Identification of Surface Waves in Numerical Studies

Mackay

2018

Plasmonics

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In a recent study published in this journal, in which surface waves were investigated numerically for a certain equichiral thin film, the criterion used to determine whether or not surface waves were excited is not adequately discriminating.Keywords Surface-plasmon-polariton wave · Dispersion relation · Cavity resonance In a recent study, the prism-coupled excitation of surfaceplasmon-polariton waves (SPPWs) was investigated numerically for the interface of a metal and an equichiral thin film (ETF) [1]. Since the constitutive properties of the ETF under investigation varied periodically in the direction of the ETF's thickness, more than one SPPW could be excited at a given wavelength by changing the direction of the incident light. The criterion used to identify an SPPW was based on the magnitude of peaks in plots of absorptance versus angle of incidence: if the absorptance peak was greater than 0.4, then this peak was claimed to represent the excitation of an SPPW. No dispersion relation from the associated canonical boundary-value problem [2] was solved in order to confirm this claim.Generally, in studies on SPPWs, many peaks may be observed in the plots of absorptance versus angle of incidence. As is comprehensively reported in the literature [2], some of these peaks may represent SPPWs, but this needs to be confirmed by checking that the wavenumbers agree with those that arise as roots of the dispersion relation of the associated canonical boundary-value problem. Some of the absorptance peaks may arise for other reasons such as cavity resonances. These absorptance peaks should be carefully distinguished from the absorptance peaks that can be attributed to SPPWs. The wavenumbers for cavity resonances do not arise as roots of the dispersion relation for SPPWs. Furthermore, cavity resonances are highly sensitive to the thickness of the thin film in the prism-coupled configuration, whereas SPPWs are not when the thin film's thickness is greater than a certain threshold [3,4]. Accordingly, some of the absorptance peaks of magnitude greater than 0.4 in Ref.[1] may well be attributable to cavity resonances (and/or other mechanisms) but not to SPPWs as claimed in that paper. As a representative counterexample, many absorptance peaks of magnitude greater than 0.4 were reported in Ref.[5] but these were not attributable to SPPWs because they did not correspond to roots of the dispersion relation of the associated canonical boundary-value problem.To summarize, the only infallible way to identify an SPPW is to solve the associated canonical boundary-value problem [5,6].In order to illustrate this matter further, the essentials of the associated canonical boundary-value problem are presented here; for comprehensive details, readers are referred elsewhere [2]. The canonical boundary-value problem is considered for electromagnetic-surface-wave propagation at the planar interface of two dissimilar materials: one occupying the half-space z > 0 (labeled A) and the other occupying the half-space z < 0 (labeled B). The ...

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“…(0 1 r s r p ) T (4), all computational details in Eq. 4 are contained in published literatures [18][19][20][21],where (r s ,r p ) and (t s ,t p ) are the amplitudes of re ected and transmitted waves with s-and p-linear polarizations.Then, we can obtain optical absorption as A = 1 − ∑ i = s , p (R ip + T ip ) ,where R ip = ⌊r i ⌋ 2 and…”

Section: Theory In Briefmentioning

confidence: 99%

Plexciton Modes Guided by an Exciton Slab in a Columnar Thin Film

Rostami

Babaei

2021

Preprint

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In this study, we reported plasmon-exciton coupling for excitation the surface plexciton in columnar thin film with a central exciton slab using the transfer matrix method in Kretschmann configuration. The optical absorption spectra for surface plasmon polariton, surface exciton and surface plexciton was investigated at different structural parameters in proposed structure. The characteristics of surface optical modes were analyzed and there was an anticrossing behavior between polariton branches of plexciton spectra. Localization of surface modes on interfaces and hybridization between plasmons and excitons at both interfaces of exciton slab were proved by the time-averaged Poynting vector. We found that the types of coupling regimes between plasmons and excitons from weak to strong could be achieved. We found a high Rabi splitting energy 840 meV corresponding to the time period 5 fs which includes to the fast energy transfer between surface plasmon polaritons and surface excitons.

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Excitation of Multiple Surface Plasmon-Polaritons by a Metal Layer Inserted in an Equichiral Sculptured Thin Film

Cited by 7 publications

References 35 publications

Excitation of Surface Plasmon-Polariton Wave at Both Interfaces of a Silver Thin Film in Two-Layer Kretschmann Geometry

Excitation of Surface Plasmon-Polariton Wave at Both Interfaces of a Silver Thin Film in Two-Layer Kretschmann Geometry

On the Identification of Surface Waves in Numerical Studies

Plexciton Modes Guided by an Exciton Slab in a Columnar Thin Film

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