Controlling Electric Field and Photoemission at the Tips of Triangular Gold Antennas

Scheffler, Christopher M.; Word, Robert Campbell; Könenkamp, R.

doi:10.1007/s11468-020-01292-7

Cited by 6 publications

(1 citation statement)

References 28 publications

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“…For DDA simulations, the importance of such highly detailed models has also been shown by Perassi 107 . The same method of nanolithographic mapping of near-field distributions via ablation has recently been applied by Nagy et al 108 in an investigation of near-field-induced femtosecond breakdown of gold triangles of about half the structure size shown in Fig. 23.…”

Section: Triangular Plasmonic Nanostructuresmentioning

confidence: 99%

Optical near-field imaging and nanostructuring by means of laser ablation

Boneberg¹,

Leiderer²

2021

OES

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In this review we consider the development of optical near-field imaging and nanostructuring by means of laser ablation since its early stages around the turn of the century. The interaction of short, intense laser pulses with nanoparticles on a surface leads to laterally tightly confined, strongly enhanced electromagnetic fields below and around the nano-objects, which can easily give rise to nanoablation. This effect can be exploited for structuring substrate surfaces on a length scale well below the diffraction limit, one to two orders smaller than the incident laser wavelength. We report on structure formation by the optical near field of both dielectric and metallic nano-objects, the latter allowing even stronger and more localized enhancement of the electromagnetic field due to the excitation of plasmon modes. Structuring with this method enables one to nanopattern large areas in a one-step parallel process with just one laser pulse irradiation, and in the course of time various improvements have been added to this technique, so that also more complex and even arbitrary structures can be produced by means of nanoablation. The near-field patterns generated on the surface can be read out with high resolution techniques like scanning electron microscopy and atomic force microscopy and provide thus a valuable tool-in conjunction with numerical calculations like finite difference time domain (FDTD) simulations-for a deeper understanding of the optical and plasmonic properties of nanostructures and their applications.

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Section: Triangular Plasmonic Nanostructuresmentioning

confidence: 99%

Optical near-field imaging and nanostructuring by means of laser ablation

Boneberg¹,

Leiderer²

2021

OES

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Optical Nanostructuring by Near-Field Laser Ablation

Boneberg

Scheer²,

Leiderer³

2023

Springer Series in Optical Sciences

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Photoemission Electron Microscopy of Blue and UV Surface Plasmons on Nanostructured Aluminum Films

et al. 2023

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We image surface plasmons on aluminum surfaces in the ultraviolet and blue spectral range with photoemission electron microscopy (PEEM). Plasmon excitation is mediated by light incident on straight aluminum ridges with subwavelength cross section on flat aluminum films. We observe interference patterns due to light/plasmon interaction, with distinct periodicity and orientation depending on the light in-plane incidence angle with respect to the ridge orientation. From the interference patterns, we deduce the surface plasmon propagation directions and decay lengths. The latter are remarkably high with 2.8 $$\mu$$ μ m and 8.4 $$\mu$$ μ m for excitation wavelengths of 273 nm and 410 nm, respectively. Our results extend PEEM imaging of surface plasmons into the ultraviolet region.

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Controlling Electric Field and Photoemission at the Tips of Triangular Gold Antennas

Cited by 6 publications

References 28 publications

Optical near-field imaging and nanostructuring by means of laser ablation

Optical near-field imaging and nanostructuring by means of laser ablation

Optical Nanostructuring by Near-Field Laser Ablation

Photoemission Electron Microscopy of Blue and UV Surface Plasmons on Nanostructured Aluminum Films

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