Scattering and extinction of evanescent waves by small particles

Mie scattering and optical forces from evanescent fields: A complex-angle approach

“…In other words, one does not need to solve a new problem but only apply a simple geometric transformation to the known solutions. Naturally, our results coincide with those obtained by previous exact methods [10][11][12][13][14][15] or in the dipole-scattering approximation for small particles [19][20][21][22][23]. However, our approach offers significant advantages, including a much more transparent and time-saving procedure, use of the well-elaborated Mie-theory calculation schemes, existing software codes, etc.…”

“…This theory is mathematically equivalent to the previous exact methods [10][11][12][13][14][15] based on the explicit expansion of the incident evanescent field in spherical functions and the boundary-problem solution (we show this in Section 4). However, our method is free from tedious analytic transformations and the whole calculation requires only the standard Mie formulas derived for the z-directed incident plane wave.…”

“…Analogues of the Mie theory for evanescent waves were elaborated [10][11][12][13], while the radiation forces from evanescent fields were extensively examined theoretically [13][14][15][16][17][18][19][20][21][22][23] and experimentally [24][25][26][27][28][29][30][31]. Most of these Mie-type approaches are based on a straightforward expansion of the incident evanescent wave in a series of vector spherical harmonics and the subsequent reproduction of the Mie procedure, which results in rather cumbersome calculations [10][11][12][13][14][15][16][17]. Alternatively, one can treat analytically the simplest approximation of the dipole Rayleigh scattering of evanescent waves by small (much less than the wavelength) particles [19][20][21][22][23].…”

Light scattering near and from interfaces using evanescent wave and ellipsometric light scattering

“…Total cross sections for extinction and scattering for an EW were introduced and calculated by Quinten et al [49]. Further theoretical work was stimulated by an experiment of Kawata and Sugiura, who observed the movement of PS spheres (2R = 1 μm, 6.8 μm, 27 μm) and glass particles (2R = 2 μm, 8 μm) by the light pressure of an EW [50 • ].…”

Plasmon spectra of nanospheres under a tightly focused beam

“…Nevertheless, since the NP is very small compared to the wavelength, the measured plasmon spectrum is usually only compared to theory based on plane wave (PW) illumination [1]. While the effect of supporting films and substrates has been extensively investigated [18,19,20,21,22], to the best of our knowledge, there is no detailed study on the spectrum of metal NPs under tight illuminations [23,24].…”