Optical low-frequency absorption of small metal particles

Оптичні Характеристики Біметалевих Нанокуль

“…(2) and (3) increases with the particle radius , and the values of the quantities Im and Im mag become approximately equal to each other at ≈ 2 nm [16].…”

“…In the framework of the dipole approximation for monometallic spheres, the absorption, abs , and scattering, sca , cross-sections are determined in terms of the electric, , and magnetic, mag , polarizabilities as follows [1,16,17]:…”

“…After the publication of the famous book [19], in which the optical size-dependent properties of monometallic clusters located in various matrices were analyzed, there appeared only a few reports on the results of new measurements in the literature, most likely because of the complicated character of experiments [20][21][22]. Interest in the early works was mainly focused on the absorption by metal particles in the far-infrared spectral interval (see, e.g., works [16,17] and the references therein). Nowadays, the focus of research is aimed at nanoplasmonics, which is associated, first of all, with its applications in biology and medicine.…”

Effects of charging and tunnelling in a structure based on magic and non-magic metal clusters

“…where τ is a relaxation time in the bulk of the metal, caused by electron-electron collisions (τ × 10 14 = 6.23 s for Au at T = 75 K [21]), and v F is the electron velocity at the Fermi surface in the bulk. The estimation performed in [22] gives a preferred electron collision on walls of a dot, therefore τ ε R/v F . This leads to τ ε ε p / h {0.52, 0.17}, i.e.…”