Light propagation through nanometer-sized structures: the two-dimensional-aperture scanning near-field optical microscope

Novotny, Lukas; Pohl, Dieter; Regli, P.

doi:10.1364/josaa.11.001768

Cited by 225 publications

(123 citation statements)

References 12 publications

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“…Although they are predicted to have extremely high transmission efficiency, apertureless optical fiber tips with high transmission efficiency have never been manufactured [32,33]. On the contrary, apertured tips have been widely used in light nano-focusing, albeit without the aid of the surface plasmons [26,[34][35][36]. In 2009, apertured tips exploiting the surface plasmons to confine light to sub-wavelength spot sizes (λ/3) in optical fibers and microfibers were realized [37,38]: the use of the SPs improved transmission efficiency by several orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Efficient light confinement with nanostructured optical microfiber tips

Ding

Fenwick

Stasio

et al. 2012

Optics Communications

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Nanostructured optical microfiber tips are proposed and experimentally demonstrated to efficiently confine light beyond the diffraction limit at high powers. Focused ion beam milling was used for the nanostructuring of gold-coated optical microfiber tips with both single-ramp and wedge geometries. Small apertures were formed by flat cutting or hole drilling and optical spot sizes of ~λ/10 with high transmission efficiency were achieved. Numerical simulations were carried out to optimize the device design with circularly polarized light. Enhanced transmission efficiencies (higher than 10 -2 ) were recorded by optimizing the overall light throughput along the fiber tips. The tip thermal behavior was investigated by launching high powers into the device and recording the tip position in a scanning optical near-field microscopy set-up. This nanostructured optical microfiber tip has the potential for applications in optical recording, scanning near-field optical microscopy and lithography.

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Section: Introductionmentioning

confidence: 99%

Efficient light confinement with nanostructured optical microfiber tips

Ding

Fenwick

Stasio

et al. 2012

Optics Communications

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“…[2][3][4][5][6][7][8][9] Recently, procedures have also been proposed for solving the important inverse problem, i.e., the reconstruction of the topographic profile from the near-field data. [10][11][12][13] On the other hand, to the best of our knowledge, pure dielectric contrast has been investigated only in two-dimensional systems or by means of a perturbative approach, [14][15][16] and no self-consistent calculations have yet been presented on pure dielectric contrast for three-dimensional (3D) defects buried in a dielectric surface.…”

Section: Introductionmentioning

confidence: 99%

Dielectric versus topographic contrast in near-field microscopy

1996

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Using a fully vectorial three-dimensional numerical approach (generalized field propagator, based on Green's tensor technique), we investigate the near-field images produced by subwavelength objects buried in a dielectric surface. We study the influence of the object index, size, and depth on the near field. We emphasize the similarity between the near field spawned by an object buried in the surface (dielectric contrast) and that spawned by a protrusion on the surface (topographic contrast). We show that a buried object with a negative dielectric contrast (i.e., with a smaller index than its surrounding medium) produces a near-field image that is reversed from that of an object with a positive contrast.

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“…This is consistent with energy losses due to SPP creation at hole edges, which is, however, not seen experimentally. To understand the NSOM probe effect [13], we introduce a cone-shaped fiber tip with Al coating above the film (inset, Fig. 3).…”

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confidence: 99%

Surface plasmons at single nanoholes in Au films

Yin

Vlasko-Vlasov

Rydh

et al. 2004

Applied Physics Letters

252

188

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The generation of surface plasmon polaritons (SPP's) at isolated nanoholes in 100 nm thick Au films is studied using near-field scanning optical microscopy (NSOM). Finitedifference time-domain calculations, some explicitly including a model of the NSOM tip, are used to interpret the results. We find the holes act as point-like sources of SPP's and demonstrate that the interference between the SPP and a directly transmitted wave allows for the determination of the wavelength, phase, and decay length of the SPP. The nearfield intensity patterns can be manipulated by varying the angle and polarization of the incident beam.

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Light propagation through nanometer-sized structures: the two-dimensional-aperture scanning near-field optical microscope

Cited by 225 publications

References 12 publications

Efficient light confinement with nanostructured optical microfiber tips

Efficient light confinement with nanostructured optical microfiber tips

Dielectric versus topographic contrast in near-field microscopy

Surface plasmons at single nanoholes in Au films

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