Surface plasmons in porous gold films

Руденко, С. П.; Stetsenko, M. O.; Krishchenko, I. M.; Максименко, Л. С.; Kaganovich, É. B.; Сердега, Б. К.

doi:10.1134/s0030400x16040202

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…This effect is well expressed in the TE polarizations (middle row-figure 5(b)). Apparently, the spectral broadening and the additional absorption peak for nanoporous samples appear due to the close proximity of the ligaments, and can lead to red or blue spectral shifts of dipole and multipole modes and the formation of a strong local electromagnetic field in the gaps between nanoligaments (hot spots) [79]. The four peaks in the TAS spectra of the AuNWP could be described as a composition of TAS bands seen in samples AuNW and AuTFP (figure S4).…”

Section: Polarization-dependent Transient Optical Propertiesmentioning

confidence: 99%

“…Nanostructures with closely packed ordered nanoparticles and nanostructures with randomly located nanoparticles having short-range order are characterized by strong electrodynamic near-field dipole-dipole interactions between particles. Localized and delocalized (propagating) modes of surface plasmons arise in certain structures of films with Au nanoparticles at certain wavelengths of TM and TE polarizations and angles of incidence of light; these modes differ from both SPP and LSPR [79].…”

Section: Polarization-dependent Transient Optical Propertiesmentioning

confidence: 99%

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Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires

Peckus¹,

Chauvin²,

Tamulevičius³

et al. 2019

J. Phys. D: Appl. Phys.

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Metal materials structured at nanoscale are extensively used in a variety of applications, including molecular sensing, nanoscale heaters for photothermal therapy, etc. These applications depend on the strong absorption and electric field enhancements associated with localized surface plasmon resonance (LSPR). Despite multiple investigations of LSPR relaxation dynamics in plasmonic metallic nanoparticles (i.e. nanospheres, nanocubes, etc), no detailed studies of porous thin films or nanowires have been reported so far. In this paper, LSPR relaxation dynamics of nanoporous gold thin film, gold nanowires, and nanoporous gold nanowires (structures with the potential for a vast range of sensing and optical applications) were studied by means of transient absorption spectroscopy (TAS). Au and Au/Cu thin films produced by magnetron sputtering deposition over a nanograted silicon substrate enabled the creation of highly organized nanowire arrays of centimetres length. Nanoporous structures were created by the dealloying of Au/Cu alloy. We found that formation of such a subwavelength period grating structure in gold increases the efficiency of hot electron relaxation compared to continuous film, while the porosity of gold nanostructures has the opposite effect. The results also expressed a clear dependence of the TAS signal on the polarization (i.e. orientation of the electric field with respect to the nanoporous gold nanowires) of the pump and probe pulses, compared to non-porous gold nanowires.

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Section: Polarization-dependent Transient Optical Propertiesmentioning

confidence: 99%

Section: Polarization-dependent Transient Optical Propertiesmentioning

confidence: 99%

Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires

Peckus¹,

Chauvin²,

Tamulevičius³

et al. 2019

J. Phys. D: Appl. Phys.

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“…The typical morphology and energy dispersive analysis of X-rays (ΕDX) have been investigated [10,11,12]. AR and optical-polarization properties for the zeolite 3A with 100 μm thickness and zeolite/Au composite film deposited onto (111) p-type silicon using modulation polarimetry have also been investigated [12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Antireflection Enhancement by Composite Nanoporous Zeolite 3A–Carbon Thin Film

et al. 2019

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A straightforward and effective spin-coating technique at 120 °C was investigated for the deposition of a thin nanoporous layer with antireflection properties onto glass and indium tin oxide (ITO) coated glass. A mixture of zeolite 3A powder and high iodine value vegetable oil was deposited, creating a carbonic paste with embedded nanoporous grains. Experimental results evidenced excellent broadband antireflection over the visible-near-infrared wavelength range (450–850 nm), with a diffuse reflectance value of 1.67% and 1.79%. Structural and optical characteristics stabilized over time. The results are promising for the accessible and cost-effective fabrication of an antireflective surface for optoelectronic devices.

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“…Kaganovich et al [30] studied the polarization properties of such structures. In [29,31] these films are shown to have the properties of both planar metal film and nanoparticles, respectively, demonstrating the excitation of surface plasmon-polariton resonance and surface resonance due to local plasmon resonances.…”

Section: Introductionmentioning

confidence: 99%

The optical Tamm states at the interface between a photonic crystal and nanoporous silver

Bikbaev

Vetrov

Timofeev

2016

J. Opt.

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The optical Tamm states (OTSs) localized at the edges of a photonic crystal bounded by a nanoporous silver (NPS) film are investigated. NPS involves spherical vacuum nanopores dispersed in the metal matrix and is characterized by the effective resonance permittivity. The transmission, reflection, and absorption spectra of the structures under study at the normal incidence of light are calculated. It is shown that each Tamm state has its own frequency range where the real part of effective permittivity is negative. The light field localization at the high- and low-frequency OTSs is investigated. The specific features of spectral manifestation of the OTSs are studied in dependence on the nanopore concentration in the metal matrix and on the NPS film thickness.

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Surface plasmons in porous gold films

Cited by 4 publications

References 14 publications

Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires

Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires

Antireflection Enhancement by Composite Nanoporous Zeolite 3A–Carbon Thin Film

The optical Tamm states at the interface between a photonic crystal and nanoporous silver

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