Group delay and dispersion in adiabatic plasmonic nanofocusing

Kravtsov, Vasily; Atkin, Joanna M.; Raschke, Markus B.

doi:10.1364/ol.38.001322

Cited by 72 publications

(43 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Associated with the predicted divergence of the effective index of refraction for the m = 0 mode, and resulting decrease in SPP wavelength, is a concomitant decrease in SPP group velocity. In recent experiments, we measured a decrease in SPP velocity [82] which verifies the fundamental concepts underlying the original theoretical proposals.…”

Section: Experimental Demonstration Of Adiabatic Nanofocusing On a Tipsupporting

confidence: 75%

Ultrafast Nano‐Focusing for Imaging and Spectroscopy with Electrons and Light

Lienau

Raschke

Ropers

2014

Attosecond Nanophysics

View full text Add to dashboard Cite

There is an urgent need for improved or conceptually new, ultrafast microscopy techniques which combine the best spatial and temporal resolutions possible. Techniques need to be developed which fuse nanometer-or atomic-scale imaging, such as scanning probe microscopy with ultrafast, femto-or attosecond time resolution, which is now commonplace in ultrafast science. A multitude of highly relevant, technological processes, such as the conversion of sunlight into electrical [1-3] or chemical energy [4-6], involves, on a microscopic level, the concerted motion of electrons and atomic nuclei. These processes are therefore governed by microscopic dynamics taking place on ultrashort and ultrasmall scales. Our ability to design and optimize such devices thus crucially depend on a detailed analysis and understanding of the spatio-temporal dynamics of charge, spin and atomic lattice excitations.A broad range of time-resolved microscopy techniques are currently under development or already in use. These techniques include X-ray diffraction/microscopy with large-scale free-electron lasers [7][8][9] or tabletop sources [10,11], ultrafast electron diffraction [12][13][14][15] or microscopy [16,17], time-resolved photoelectron emission microscopy [18-20] (Chapter 10), ultrafast, aperture-based [21][22][23][24][25] or aperture-less near-field scanning optical microscopy [26][27][28], and femtosecond scanning tunneling microscopy [29][30][31][32].So far, most of the techniques mentioned earlier provide either a limited temporal or spatial resolution, and the implementation of microscopy techniques with true nanometer and (sub-)femtosecond resolution [33] remains a formidable challenge. A fundamental problem in many of these approaches is the generation of sufficiently bright and temporally short light or electron pulses which are both coherent and energetically tunable [34].

show abstract

Section: Experimental Demonstration Of Adiabatic Nanofocusing On a Tipsupporting

confidence: 75%

Ultrafast Nano‐Focusing for Imaging and Spectroscopy with Electrons and Light

Lienau

Raschke

Ropers

2014

Attosecond Nanophysics

View full text Add to dashboard Cite

show abstract

“…Among the different experimentally realized geometries [63,[70][71][72][73], sharp conical metallic tapers are of particular relevance, because they are easily incorporated into scattering-type scanning near-field optical microscopes (s-SNOM) [42,74,75], where they act as a single, point-dipole-like emitter with nanometre dimensions and well-defined polarization properties. When coupling ultrafast laser pulses to propagating SPPs at the shaft of those tapers, nanometre-localized light spots with pulse durations as short as 10 fs are created at the taper apex with high efficiency [42,76]. Consequently, the optical properties of such antennas have been studied in considerable detail, both experimentally and theoretically, during the past several years [42,63,64,70,[75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic nanofocusing – grey holes for light

Groß

Esmann

Becker

et al. 2016

Advances in Physics: X

View full text Add to dashboard Cite

Improving the resolution and sensitivity in all-optical microscopy and spectroscopy is inevitably one of the most important challenges in contemporary optical and nanoscience. Here, we discuss a novel approach, plasmonic nanofocusing, towards broadband, coherent all-optical microscopy with ultrahigh temporal and spatial resolution. The conceptual idea is to launch radially symmetric surface plasmon polariton modes onto the shaft of a sharp, conical metal taper. While propagating towards the apex of the pointed taper, the spatial extent of the plasmonic mode gradually shrinks, from several microns in diameter to a spot size of less than 10 nm at the pointed apex of the conical taper. Concomitantly, the local field amplitude of the plasmon mode gradually increases, resulting in a pronounced field enhancement at the apex and -thus -a bright and spatially isolated coherent light source with dimensions far below the diffraction limit. In this review, we characterize the optical properties of such three-dimensional conical metal tapers and demonstrate nanofocusing of radially symmetric plasmon modes. We use this nanolight source for coherent light scattering spectroscopy and demonstrate the sensitivity enhancement resulting from the pronounced spatial field confinement. It is shown that such off-resonant plasmonic nanoantennas facilitate the creation of nanofocused light spots with few-cycle time resolution. As a first application of this ability to nanolocalize ultrashort plasmon wavepackets, we demonstrate remotely-triggered multiphoton-induced photoemission from the very apex of the taper and implement this novel ultrafast electron gun in a point-projection electron microscope. Our results not only indicate the favourable optical properties of this plasmonic nanolens but also suggest that it may find interesting applications in ultrafast scanning optical spectroscopy and might enable new types of ultrafast electron holography and scanning tunnelling microscopy.

show abstract

“…The ultrafast nature of the adiabatic concentration has been used to achieve simultaneously nanoscopic spatial resolution and femtosecond temporal resolution [19][20][21][82][83][84][85][86][87][88][89]. A unique application of the adiabatic nanofocusing is a new type of nanoscopy with chemical vision based on a highly efficient (with a quantum yield of 10%) hot electron generation [90].…”

Section: Adiabatic Nanofocusing and Sersmentioning

confidence: 99%

Nanoplasmonics Fundamentals and Surface-Enhanced Raman Scattering as a Physical Phenomenon

Stockman¹

2017

Recent Developments in Plasmon-Supported Raman Spectroscopy

View full text Add to dashboard Cite

Group delay and dispersion in adiabatic plasmonic nanofocusing

Cited by 72 publications

References 25 publications

Ultrafast Nano‐Focusing for Imaging and Spectroscopy with Electrons and Light

Ultrafast Nano‐Focusing for Imaging and Spectroscopy with Electrons and Light

Plasmonic nanofocusing – grey holes for light

Nanoplasmonics Fundamentals and Surface-Enhanced Raman Scattering as a Physical Phenomenon

Contact Info

Product

Resources

About