Influence of surfacemodeenhanced local fields on photophoresis
Abstract
The radiometric force (photothermal) on a sphere is investigated theoretically in the surfacemode region (1>ɛ>2). Closedform expressions obtained for this force in the transition regime (K_{n}~1) reveal a quasidoubleresonant character, with contributions from both dipole and quadrupole surface modes. Full Mie calculations verify these asymptotic expressions and extend the range of the calculations to an optical size (the ratio of the circumference to the wavelength) near 1. Applications of the theory to surface plasmons in Ag and surface phonons in SiC show that excitation of the quadrupole mode causes a reversal in the radiometric force with a factorof10^{4} increase in magnitude. The overall force (radiometric plus radiation pressure) is evaluated, and photophoretic spectra are presented.
 Publication:

Physical Review A
 Pub Date:
 February 1984
 DOI:
 10.1103/PhysRevA.29.654
 Bibcode:
 1984PhRvA..29..654A
 Keywords:

 Electrophoresis;
 Light Scattering;
 Metal Ions;
 Metal Surfaces;
 Photophoresis;
 Radiation Pressure;
 Silver;
 Ion Motion;
 Mie Scattering;
 Silicon Carbides;
 Surface Temperature;
 Physics (General)