Decay of non radiative surface plasmons into light on rough silver films. Comparison of experimental and theoretical results

Kretschmann, E.

doi:10.1016/0030-4018(72)90224-6

Cited by 223 publications

(86 citation statements)

References 5 publications

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“…By scattering at the surface roughness of the film, the SPs decay and the carried energy is reformed again to light emission. [32][33][34][35][36] Through this radiative decay channel, the intensity of the NBE emission of the ZnO film is substantially increased. Given that the skin depth into the Al layer is far less than 50 nm, the PL enhancement for the cases of 50 and 70 nm thick Al layers strongly indicates that the increase in the enhancement factor with the film thickness might be the result of the increased surface roughness, thus leading to higher enhancement of the NBE emission of ZnO due to the larger number of scattering centers.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence enhancement of ZnO via coupling with surface plasmons on Al thin films

Dellis

Kalfagiannis

Kassavetis

et al. 2017

Journal of Applied Physics

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We present that the ultra-violet emission of ZnO can be enhanced, as much as six-times its integral intensity, using an Al thin interlayer film between the Si substrate and ZnO thin film and a postfabrication laser annealing process. The laser annealing is a cold process that preserves the chemical state and integrity of the underlying aluminum layer, while it is essential for the improvement of the ZnO performance as a light emitter and leads to enhanced emission in the visible and in the ultraviolet spectral ranges. In all cases, the metal interlayer enhances the intensity of the emitted light, either through coupling of the surface plasmon that is excited at the Al/ZnO interface, in the case of light-emitting ZnO in the ultraviolet region, or by the increased back reflection from the Al layer, in the case of the visible emission. In order to evaluate the process and develop a solid understanding of the relevant physical phenomena, we investigated the effects of various metals as interlayers (Al, Ag, and Au), the metal interlayer thickness, and the incorporation of a dielectric spacer layer between Al and ZnO. Based on these experiments, Al emerged as the undisputable best choice of metal interlayers because of its compatibility with the laser annealing process, as well as due to its high optical reflectivity at 380 and 248 nm, which leads to the effective coupling with surface plasmons at the Al/ZnO interfaces at 380 nm and the secondary annealing of ZnO by the backreflected 248 nm laser beam. Published by AIP Publishing. [http://dx

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Section: Resultsmentioning

confidence: 99%

Photoluminescence enhancement of ZnO via coupling with surface plasmons on Al thin films

Dellis

Kalfagiannis

Kassavetis

et al. 2017

Journal of Applied Physics

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“…The substrate was coupled with a prism (BK-7, n 632.8 = 1.515) through an index match fluid (n D 20 = 1.516, Kargille Inc.) in Kretschmen configuration. 25 A linearly polarized He-Ne laser beam (plight, λ = 632.8 nm) impinged upon the LB film and the incident angle was changed by a stage controller (TDR-120, Sigma Koki). The intensity of the reflected light was measured by a photodiode detector (S3590-01, Hamamatsu) as a function of incident angle; data were recorded on personal computer.…”

Section: Measurementsmentioning

confidence: 99%

Preparation and Characterization of Poly(N-1H,1H- pentadecafluorooctylmethacrylamide) Langmuir-Blodgett Film

Aminuzzaman

Kado

Mitsuishi

et al. 2003

Polym J

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ABSTRACT:The monolayer behavior of poly(N-1H,1H-pentadecafluorooctylmethacrylamide (pC7F15MAA) spread on the air-water interface was investigated by measurement of surface pressure-area isotherm at different subphase temperatures. The monolayer of pC7F15MAA was transferred onto solid substrates as Y-type Langmuir-Blodgett (LB) film and the monolayer thickness was calculated by X-Ray diffraction techniques and surface plasmon measurements. Wettability and the surface structure of the LB film were investigated by measuring the static contact angle (cos θ) of water on the surface. The wettability varied slightly with increasing temperature. The critical surface tension measurement suggests that the surface of pC7F15MAA LB film covered mainly with CF 3 groups.KEY WORDS Langmuir-Blodgett Film / Fluorinated Polymer / Surface Plasmon Resonance / Wettability / The Langmuir-Blodgett (LB) technique is an excellent method for preparation of ultrathin films with controlled thickness at a molecular size and well-defined molecular orientation. 1 Recently, polymeric LB films have received much attention due to their superior mechanical and thermal stability than those of low molecular weight LB films 2 and the applications especially in the fields of coatings, optics, and electronics have been discussed. 3,4 The simplest method to fabricate the polymeric LB film is by deposition of preformed polymer monolayers. [5][6][7] For the fabrication of polymeric LB films, comb-like polymers with well-defined hydrophilic groups and hydrophobic hydrocarbon side chains are mostly studied. [8][9][10][11][12][13][14] Monolayer formation and LB film preparation in these polymers are determined by the balance of hydrophilic and hydrophobic interactions.Langmuir-Blodgett films of comb-like polymers with fluorocarbon side chains are attracting much recent attention due to their characteristic properties such as low friction, excellent insulation, excellent durability, and so on. 15,16 The fluorocarbon chains are also hydrophobic and have rigid character (stiffness of the C-F bond), which are suitable factors for stable monolayer formation. However, the deposition of the monolayer on solid substrates is difficult because of the weak interactions among the monolayer due to the low surface energy of fluorinated materials. Nonetheless, a few papers have been reported about monolayers and the fabrication of LB films from comb-like polymers with fluorocarbon side chains. [17][18][19][20][21] In previous works, we have found that polyacrylamide struc- ture is suitable for stable LB film formation due to the self-assembly property based on hydrogen bonding of amide group. 14,22,23 Using this excellent property of the acrylamide backbone, we have demonstrated that poly(N-fluoroalkylacrylamide)s form stable monolayers at the air-water interface and fairly uniform polymer LB films can be easily prepared. 24 In this work, we investigated the spreading behavior of poly(N-1H,1H-pentadecafluorooctylmethacrylamide) (Figure 1) on the water surface to prepare st...

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“…In this scheme there is a finite gap between prism base and metal layer and it is suitable for surfaces that need to be changed easily. This scheme was modified by Kretschmann and Raether [12] and Kretschmann [13]. In Kretschmann's scheme, a metal layer contacts the prism base (Figure 1(b)).…”

Section: Surface Plasmon Sensorsmentioning

confidence: 99%

Surface Plasmon Resonance‐Based Fiber and Planar Waveguide Sensors

Kashyap

Nemova

2009

Journal of Sensors

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Bulk surface Plasmons resonance devices have been researched for several decades. These devices have found a special niche as high-sensitivity refractive index sensor in biomedical applications. Recent advances in guided wave devices are rapidly changing the capabilities of such sensors, not only increasing convenience of use but also opening opportunities due to their versatility. This paper reviews many of these devices and presents some of their salient features.

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Decay of non radiative surface plasmons into light on rough silver films. Comparison of experimental and theoretical results

Cited by 223 publications

References 5 publications

Photoluminescence enhancement of ZnO via coupling with surface plasmons on Al thin films

Photoluminescence enhancement of ZnO via coupling with surface plasmons on Al thin films

Preparation and Characterization of Poly(N-1H,1H- pentadecafluorooctylmethacrylamide) Langmuir-Blodgett Film

Surface Plasmon Resonance‐Based Fiber and Planar Waveguide Sensors

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