Imaging and Characterizing Long-Range Surface Plasmon Polaritons Propagating in a Submillimeter Scale by Two-Color Two-Photon Photoelectron Emission Microscopy

Shibuta, Masahiro; Eguchi, Toyoaki; Nakajima, Atsushi

doi:10.1007/s11468-013-9554-6

Cited by 22 publications

(21 citation statements)

References 25 publications

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“…In the past decade, metal plasmonic nanostructures have attracted a great deal of attention because of their large field enhancement and small module volume. In addition, metal plasmon nanoparticles made of different materials with various shapes [1,2] and different surface structures have been used to couple the electromagnetic energy with molecules to enhance fluorescence [3][4][5] and surface-enhanced Raman scattering (SERS) [6,7]. However, in practical applications, intrinsic absorption, external heating, and other factors inevitably impact the metals [8].…”

Section: Introductionmentioning

confidence: 99%

Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement

Liu

et al. 2021

Nanomaterials

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High refractive index dielectric nanostructures represent a new frontier in nanophotonics, and the unique semiconductor characteristics of dielectric systems make it possible to enhance electric fields by exploiting this fundamental physical phenomenon. In this work, the scattered radiation spectral features and field-enhanced interactions of gallium phosphide disks with forked slits at anapole modes are investigated systematically by numerical and multipole decomposition analyses. Additional enhancement of the electric field is achieved by opening the forked slits to create high-intensity hot spots inside the disk, and nearby molecules can access these hot spots directly. The results reveal a novel approach for near-field engineering such as electric field localization, nonlinear optics, and optical detection.

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Section: Introductionmentioning

confidence: 99%

Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement

Liu

et al. 2021

Nanomaterials

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“…Most PEEM studies focused so far on surface plasmon polaritons (SPP) supported by metaldielectric interfaces. Topics included SPP phase and group propagation [4][5][6][7], SPP dispersion [8,9], plasmonic focusing [10,11] and switching [12], plasmonic waveguiding [13,14], and the formation of plasmonic vortices [15].…”

Section: Introductionmentioning

confidence: 99%

Detection and characterization of attenuated multimode waveguiding inSiO2slabs using photoemission electron microscopy

Klick¹,

Wagner²,

Großmann³

et al. 2018

Phys. Rev. B

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Multimode waveguiding in the visible and near-ultraviolet spectral regime is observed and characterized in thermally grown SiO 2 layers on silicon using photoemission electron microscopy (PEEM). Comparison with finite-element-method simulations allows identifying order and character of the attenuated modes. Real-time investigations on mode propagation support these findings and give additional evidence for the existence of radiative modes. Finally, the presented experimental results illustrate how a defined deposition of gold nanoparticles can substantially enhance the sensitivity of the PEEM technique to electromagnetic field modes supported by thin dielectric and insulating layers.

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“…18−36 In terms of SPP imaging, time and lateral resolution as well as quick imaging are advantages of the 2P-PEEM that allow it to stand out from other approaches. What is more, methodological developments (e.g., alkali atom deposition for lowering workfunc-tions, 22,23,25,26,33 detection of multiphoton photoemission, 28,30,32,35 normally incident configurations of light sources, 27,29,30,33,36 and dual-color 2P-PEEM) 24,34 make 2P-PEEM even more versatile. However, despite the fascinating advantages of 2P-PEEM, target samples whose SPPs can be visualized are limited to naked metal surfaces or ultrathin (a few nm) dielectric film/metal interfaces, since 2P-photoemission is highly suppressed for thick dielectric surfaces.…”

mentioning

confidence: 99%

“…The principles of SPP imaging with NIR/UV dual-color 2P-PEEM have been described elsewhere. 24,34 Briefly, NIR (ℏω NIR = ℏc/k 0 , where c is the speed of light, and k 0 is the wavevector) excites SPPs at the intrinsic defect of the Au(111) ) and the dielectric function (ε Au = (n + ik) 2 , where n and k are the refractive index and extinction coefficient of Au, respectively; n = 0.165 and k = 5.401 at ℏω NIR = 1.44 eV), 24,37 the simulated k SPP value, 7.43 × 10 6 m −1 , which gives λ beat = 7.74 μm (= 2π/ k beat ), is used for lateral scaling of the 2P-PEEM images. Note that SPPs generally propagate in both forward and backward (±k SPP ) directions, and the backward propagating SPPs would show much narrower beats of λ beat = 0.45 μm on the opposite side, 22,38 although this is less focused on in this report.…”

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confidence: 99%

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Visualization of Surface Plasmons Propagating at the Buried Organic/Metal Interface with Silver Nanocluster Sensitizers

2020

Self Cite

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Visualization of surface plasmon polariton (SPP) propagation at dielectric/metal interfaces is indispensable in providing opportunities for the precise designing and controlling of the functionalities of future plasmonic nanodevices. Here, we report the visualization of SPPs propagating along the buried organic/metal interface of fullerene (C 60 )/Au(111), through dual-colored two-photon photoemission electron microscopy (2P-PEEM) which precisely visualizes the SPP propagation of plasmonic metal nanostructures. Although SPPs excited by near-infrared photons at the few monolayer C 60 /Au(111) interface are clearly visualized as interference beat patterns between the SPPs and incident light, faithfully reflecting SPP properties modulated by the overlayer, photoemission signals are suppressed for thicker C 60 films, due to less valence electrons participating in 2P-photoemission processes. With the use of silver (Ag n (n = 21 and 55)) nanoclusters, which exhibit enhancement of overall photoemission intensities due to localized surface plasmons functioning as SPP sensitizers, it is revealed that the 2P-PEEM is applicable to the imaging of SPPs for thick C 60 /Au(111) interfaces, where SPP properties are hardly modulated by the added small amount (∼0.1 monolayer) of Ag n sensitizers.

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Imaging and Characterizing Long-Range Surface Plasmon Polaritons Propagating in a Submillimeter Scale by Two-Color Two-Photon Photoelectron Emission Microscopy

Cited by 22 publications

References 25 publications

Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement

Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement

Detection and characterization of attenuated multimode waveguiding inSiO2slabs using photoemission electron microscopy

Visualization of Surface Plasmons Propagating at the Buried Organic/Metal Interface with Silver Nanocluster Sensitizers

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