Natural electron oscillations in granular indium films deposited on rough surfaces of NaCl and KCl single crystals

Study of plasma frequency for Al�In alloys with different concentrations

“…We obtain ω P = 17.46×10 15 s -1 for the indium granules embedded in sodium chloride, for which the frequency of the natural electron oscillations is equal to ω 0 = 6.95×10 15 s -1 and the dielectric constant to ε 0 = 2.65. This agrees perfectly with the data obtained in the study [2]. Notice that similar results have been obtained in Ref.…”

“…The authors Ref. [2] believe that simultaneous excitation of the low-frequency bands for the indium-based granular films with the frequency S  and of the high-frequency bands with the frequency ω 0 of natural electron oscillations in the isolated granules is possible only if the granules corresponding to the both bands do not belong to the same layer of the film. The latter is possible if the granular films deposited on the rough surface form a double layer (see Fig.…”

Polycrystalline indium films in the percolation threshold regime: time correlation between electric conduction and optical properties with film morphology

“…The dielectric function of the particles has been corrected to include the effect of surface scattering of free electrons at the boundary of each grain. This correction requires intrinsic relaxation time of the electrons, whose value was indicated previously, and of the plasma frequency, ω ℏ = eV 11.5 p [37]. Figure 11 shows the average extinction cross section per unit volume and per particle for clusters of nano-sized grains.…”

Plasmonic effects and optical properties of InN composites with In nanoparticles

“…The electroluminescence efficiency in porous Si with In nanoparticles has been significantly increased 50. Plasmonic resonances have been registered in the 2.8–4.5 eV range for granular In films deposited on NaCl and KCl 51. The SERS has been observed for In as well 52.…”