Aluminum for Nonlinear Plasmonics: Resonance-Driven Polarized Luminescence of Al, Ag, and Au Nanoantennas

Castro-López, Marta; Brinks, Daan; Sapienza, Riccardo; Hulst, Niek F. van

doi:10.1021/nl202255g

Cited by 172 publications

(131 citation statements)

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“…Au NPs are known to undergo both SH generation 26,27 and two-photon absorption, giving rise to twophoton photoluminescence (TPPL). 28 The onset of TPPL emission spectrally overlaps with the long wavelength part of the SH spectrum. TPPL from Au has been successfully used for mapping the plasmonic resonances of Au NPs.…”

Section: Control Of Fs Pulses For Ultrafast Nanophotonics N Accanto Ementioning

confidence: 98%

Phase control of femtosecond pulses on the nanoscale using second harmonic nanoparticles

et al. 2014

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Investigations of ultrafast processes occurring on the nanoscale require a combination of femtosecond pulses and nanometer spatial resolution. However, controlling femtosecond pulses with nanometer accuracy is very challenging, as the limitations imposed both by dispersive optics on the time duration of a pulse and by the spatial diffraction limit on the focusing of light must be overcome simultaneously. In this paper, we provide a universal method that allows full femtosecond pulse control in subdiffraction-limited areas. We achieve this aim by exploiting the intrinsic coherence of the second harmonic emission from a single nonlinear nanoparticle of deep subwavelength dimensions. The method is proven to be highly sensitive, easy to use, quick, robust and versatile. This approach allows measurements of minimal phase distortions and the delivery of tunable higher harmonic light in a nanometric volume. Moreover, the method is shown to be compatible with a wide range of particle sizes, shapes and materials, allowing easy optimization for any given sample. This method will facilitate the investigation of light-matter interactions on the femtosecond-nanometer level in various areas of scientific study.

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Section: Control Of Fs Pulses For Ultrafast Nanophotonics N Accanto Ementioning

confidence: 98%

Phase control of femtosecond pulses on the nanoscale using second harmonic nanoparticles

et al. 2014

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“…Because the nonlinear photoluminescence (nPL) response and the heat generation both rely on the amplitude of the local electric field in the metal, these types of plasmonic structures have been systematically probed by nonlinear photoluminescence microscopy 35,36 . We use here the generic nPL labeling since the mechanism of the nonlinear emission in metals is still being debated 37 .…”

Section: Resultsmentioning

confidence: 99%

“…The band structure of Aluminum shows that electrons below the Fermi level can be excited by photons with energy close to 1.5 eV (λ ≈ 800 nm), hence undergoing an interband transition at the K and W symmetry points 1 . On the basis of previous studies of the nPL response of Al antennas at such energies 35 , we intentionally probed the plasmonic resonances close to the maximum of these interband transitions, as illustrated by the SP density of states (SP-LDOS) distribution computed in Fig.1(b). In spite of high dissipation leading to damping of the SP resonances, the SP local density of states features maxima located along the edges of the cavity.…”

Section: Resultsmentioning

confidence: 99%

Local field enhancement and thermoplasmonics in multimodal aluminum structures

et al. 2017

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Aluminum nanostructures have recently been at the focus of numerous studies due to their properties including oxidation stability and surface plasmon resonances covering the ultraviolet and visible spectral windows. In this article, we reveal a new facet of this metal relevant for both plasmonics purpose and photo-thermal conversion. The field distribution of high order plasmonic resonances existing in two-dimensional Al structures is studied by nonlinear photoluminescence (nPL) microscopy in a spectral region where electronic interband transitions occur. The polarization sensitivity of the field intensity maps shows that the electric field concentration can be addressed and controlled ondemand. We use a numerical tool based on the Green dyadic method to analyze our results and to simulate the absorbed energy that is locally converted into heat. The polarization-dependent temperature increase of the Al structures is experimentally quantitatively measured, and is in an excellent agreement with theoretical predictions. Our work highlights Al as a promising candidate for designing thermal nanosources integrated in coplanar geometries for thermally assisted nanomanipulation or biophysical applications.Metallic nanostructures sustain localized and delocalized Surface Plasmon (SP) resonances when they are excited under specific conditions. These resonances are giving rise to large enhancement of the electromagnetic field, subwalength confinement, and plasmon propagation in structures with low dimensionalities 1,2 . Owing to their remarkable optical properties, SP resonances have led to a large number of direct applications including high-precision biological sensing 3 , light manipulation by metasurfaces 4 , design of integrated devices for information processing 5 , and highly localized heat sources 6,7 . Due to the large negative real part of the dielectric function in the visible spectrum, gold or silver, either as lithographed patterns or as colloidal nanoparticles, represent the bulk of plasmonic devices so far. Although both metals exhibit complementary features that have fostered the fast development of plasmonics as a technology, these two noble metals also suffer from drawbacks; namely bulk oxidation for silver and an important interband absorption for gold at energies above 2.25 eV. Moreover, both are expensive materials limiting their systematic and massive use in commercial systems. These considerations triggered a rising interest for non-conventional plasmonic materials 8,9 . In this context, while discarded for a long time for plasmonic applications due to its high losses in the red part of the visible spectrum, aluminum has recently demonstrated its potential for applications in the blue-ultraviolet energy range 1,[10][11][12][13][14][15][17][18][19][20] . The main asset of Al over other noble metals stems mainly from a * Corresponding author: aurelien.cuche@cemes.fr plasma frequency ω p situated at a higher energy. In addition to its intrinsic electronic properties, the optical response of aluminum is ...

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“…Exciting the SPP waves is used in a variety of applications [22][23][24][25][26][27] ranging from light filtering [28,29] to harmonic generation [30][31][32][33]. Structures such as lamellar gratings, split-ring resonators, plasmonic coaxial guides and bowties among others have been investigated in great detail both theoretically [27,[34][35][36][37] and experimentally [38][39][40][41][42][43].…”

Section: Applicationsmentioning

confidence: 99%

Plasmon Enhanced Photoemission

Polyakov

2012

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Next generation ultrabright light sources will operate at megahertz repetition rates with temporal resolution in the attosecond regime. For an X-Ray Free Electron Laser (FEL) to operate at such repetition rate requires a high quantum e ciency (QE) cathode to produce electron bunches of 300 pC per 1.5 µJ incident laser pulse. Semiconductor photocathodes have su cient QE in the ultraviolet (UV) and the visible spectrum, however, they produce picosecond electron pulses due to the electron-phonon scattering. On the other hand, metals have two orders of magnitude less QE, but can produce femtosecond pulses, that are required to form the optimum electron distribution for high e ciency FEL operation. In this work, a novel metallic photocathode design is presented, where a set of nano-cavities is introduced on the metal surface to increase its QE to meet the FEL requirements, while maintaining the fast time response.Photoemission can be broken up into three steps: (1) photon absorption, (2) electron transport to the surface, and (3) crossing the metal-vacuum barrier. The first two steps can be improved by making the metal completely absorbing and by localizing the fields closer to the metal surface, thereby reducing the electron travel distance. Both of these e↵ects can be achieved by coupling the incident light to an electron density wave on the metal surface, represented by a quasi-particle, the Surface Plasmon Polariton (SPP).The photoemission then becomes a process where the photon energy is transferred to an SPP and then to an electron. The dispersion relation for the SPP defines the region of energies where such process can occur. For example, for gold, the maximum SPP energy is 2.4 eV, however, the work function is 5.6 eV, therefore, only a fourth order photoemission process is possible. In such process, four photons excite four plasmons that together excite only one electron. The yield of such non-linear process depends strongly on the light intensity.In this work, the structure consisted of rectangular nano-grooves (NGs) arranged in a subwavelength grating on a metal surface is presented that provides a dramatic increase in the metal's absorption, field localization, and field enhancement. When light is polarized perpendicular to the orientation of the grooves a standing SPP wave is excited along the vertical walls in the NGs, that act as Fabry-Perot resonators. By adjusting the geometry of 2 the NGs and the period of the subwavelength grating the resonance can be fine tuned to a desired position, for example, the laser fundamental wavelength, anywhere from the UV to the near infrared (NIR).Two types of gratings are presented: (a) a gold grating with period of 600 nm, and (b) an aluminum-gold grating with a period of 100 nm; both with resonance at 720 nm. In each case, strong on-resonance absorption was observed, with over 98% for grating (b). Unlike the grating-coupled SPP waves, where the angle is well defined by the momentum matching condition, the resonant NGs allow coupling to the standing modes at a range...

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Aluminum for Nonlinear Plasmonics: Resonance-Driven Polarized Luminescence of Al, Ag, and Au Nanoantennas

Cited by 172 publications

References 46 publications

Phase control of femtosecond pulses on the nanoscale using second harmonic nanoparticles

Phase control of femtosecond pulses on the nanoscale using second harmonic nanoparticles

Local field enhancement and thermoplasmonics in multimodal aluminum structures

Plasmon Enhanced Photoemission

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