Plasma resonance in granular gallium films deposited on rough NACl and KCl single-crystal surfaces

Shklyarevskiĭ, I. N.; Bondarenko, Yu. Yu.; Makarovskii, N. A.

doi:10.1134/1.626836

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…Figure 3͑a͒ shows R() of pure gallium. The free electron plasma frequency, p of Ga is at about 14 eV, 27 and thus lies outside our spectral range. In the measured spectral range R() is rather flat at RϷ70% -80% with a moderate increase to RϷ100% at low frequencies.…”

Section: Methodsmentioning

confidence: 83%

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Optical studies of metallodielectric photonic crystals: Bismuth and gallium infiltrated opals

Kamaev

Кожевников

Vardeny

et al. 2004

Journal of Applied Physics

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Enhanced Bragg reflections from size-matched heterostructure photonic crystal thin films prepared by the Langmuir-Blodgett method Appl. Phys. Lett. 89, 093116 (2006); 10.1063/1.2339031 Metallic photonic crystals with strong broadband absorption at optical frequencies over wide angular range J. Appl. Phys. 97, 093104 (2005); 10.1063/1.1889248 Fabrication of three-dimensional photonic crystal with alignment based on electron beam lithography Appl. Phys. Lett. 85, 5037 (2004); 10.1063/1.1825623Low-loss one-dimensional metallodielectric photonic crystals fabricated by metallic insertions in a multilayer dielectric structure

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Section: Methodsmentioning

confidence: 83%

“…Equation ͑4͒ was used for M in Eq. ͑1͒, with f ϭ1 and p ϭ13.8 eV, 27 and keeping Ga (ϱ) and ␥ Ga as free parameters. The best fitting parameters are given in Table I and the corresponding reflectivity spectrum, which is in good agreement with the experimental data, is shown in Fig.…”

Section: Theorymentioning

confidence: 99%

Optical studies of metallodielectric photonic crystals: Bismuth and gallium infiltrated opals

Kamaev

Кожевников

Vardeny

et al. 2004

Journal of Applied Physics

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“…It is known that the plasmon frequency of the p-block metals lie in the deep UV spectral region. ,,− The presence of interband transitions in the infrared and visible spectral region − leads to a decrease in their efficiency for excitation of LSPR in the IR spectral region and a better efficiency in the UV spectral region compared to silver and gold. These characteristics of the p-block metals are a reason to study their alloys with the noble metals, because a tuning of plasmon frequency with enough efficiency in the UV spectral region is expected to be achieved. , …”

Section: Optical Properties Of Noble Metals and Alloys Between Themmentioning

confidence: 99%

Silver and Gold Containing Compounds of p-Block Elements As Perspective Materials for UV Plasmonics

et al. 2023

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We present a review of phase formation tendencies, methods for preparation and optical properties of alloys and compounds from the binary systems of silver or gold with metals and metalloids from the p-block of the Periodic system of elements. Reference data about the homogeneity regions in the systems of interest, together with information about the crystalline structure of existing indexed compounds in them, is proposed and statistically analyzed. General background for the synthesis of intermetallic alloys and compounds, and the tendencies for their preparation for plasmonic purposes are presented. The high plasma frequency, ω p of p-block metals makes their alloys with silver and gold an interesting object of study, due to the possibility of ω p variation over a wide interval in the ultraviolet (UV) spectral region with a view to finding more efficient materials for excitation of a localized surface plasmon resonance (LSPR) necessary for various applications and techniques operating in this part of the electromagnetic spectrum. Unlike the alloys between the noble metals Cu, Ag, and Au, which form continuous series of solid solutions, different areas can be observed in the phase diagrams of the Ag(Au)−p-block systems, containing solid solutions, intermetallic compounds, and heterogeneous mixtures. The ability to vary the plasma frequency of solid solutions, like the alloys between the noble metals Cu, Ag, and Au, is the reason to pay attention to the compositions of the Ag(Au−p-block systems that fall in these regions of their phase diagrams. The analysis of the published results for complex permittivity shows that the addition of small amounts of conductive p-block elements to noble metals reduces the energy gap for interband transitions and increases their plasmonic activity in the UV spectral range. The article analyzes the relationship between electrical resistivity and LSPR excitation efficiency, which shows that the intermetallic compounds from Ag(Au)−p-block systems with a well-ordered crystalline structure and good conductivity level can be more effective materials for UV plasmonics than the boundary solid solutions. Intermetallic compounds can be easily obtained in the form of bulk samples, thin films, and nanoparticles with controlled size and geometric shape. The spectral dependences of the plasmon efficiency of the intermetallic compounds, determined from their complex permittivity functions, show that they are promising materials for excitation of LSPR in the UV spectral region.

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“…However, Hampe did not take into account the dipole-dipole interaction between the granules. All of the above ideas were combined in the Hampe-Shklyarevskii theory [16] where the values of the real and imaginary parts of the effective permittivity of a granular film were found to agree with the experiment [17]. This theory describes eigenfrequency as follows:…”

Section: Introductionmentioning

confidence: 99%

Permittivity Model Selection Based on Size and Quantum-Size Effects in Gold Films

Riabenko,

Shulga,

Makarovskii

et al. 2023

East Eur. J. Phys.

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The article is focused on optical properties of nanostructures containing spherical gold nanoparticles of various radii. We explore correlation between the particle radius and the choice of permittivity model applied to describe optical absorption spectra of gold granules. The experiments show splitting of the absorption band of granular gold films to form a second absorption peak. The first peak is associated with the phenomenon of plasmon resonance, while the second one reflects quantum hybridization of energy levels in gold. Quantum effects are shown to prevail over size effects at a granule diameter of about 5-6 nm. The Mie theory gives a rigorous solution for the scattered electromagnetic field on a sphere taking into account optical properties of the latter, however, it does not specify the criteria for selecting a model to calculate dielectric permittivity. Both calculations and experiments confirm the limiting diameter of gold nanoparticles where the Hampe-Shklyarevsky model is applied. Meanwhile, this model is still unable to predict the splitting of the plasma absorption band. The data presented in the article can be used for a predetermined local field enhancement in composite media consisting of a biolayer and metal nanoparticles. The conducted research provides a deeper understanding of the influence of a terahertz high-intensity electromagnetic field localized in the space on quantum dots.

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Plasma resonance in granular gallium films deposited on rough NACl and KCl single-crystal surfaces

Cited by 6 publications

References 2 publications

Optical studies of metallodielectric photonic crystals: Bismuth and gallium infiltrated opals

Optical studies of metallodielectric photonic crystals: Bismuth and gallium infiltrated opals

Silver and Gold Containing Compounds of p-Block Elements As Perspective Materials for UV Plasmonics

Permittivity Model Selection Based on Size and Quantum-Size Effects in Gold Films

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