We study the nonlocal spin and charge current generation in a finite metallic element on the surface of magnetic insulators such as tcb{yttrium iron garnet} due to the absorption of the magnetic surface plasmon (MSP). Whereas a surface plasmon is com
pletely reflected by a metal, tcb{an} MSP tcb{can be} absorbed tcb{due to the absence of backward states}. The tcb{injection of} MSP generates a voltage in the longitudinal direction parallel to the wave vector, tcb{with the voltage} proportional to input power. If the metal is a ferromagnet, a spin current can also be tcb{induced} in the longitudinal direction. Our tcb{results provide a way to improve upon} integrated circuits of spintronics and spin wave logic devices.
The boundary element method is applied to investigate the optical forces when whispering gallery modes (WGMs) are excited by a total internally reflected wave. Such evanescent wave is particularly effective in exciting the high-$Q$ WGM, while the low
angular or high radial order modes are suppressed relatively. This results in a large contrast between the forces on and off resonance, and thus allows for high size-selectivity. We fully incorporate the prism-particle interaction and found that the optical force behaves differently at different separations. Optimal separation is found which corresponds to a compromise between intensity and $Q$ factor.
We solve {bf analytically} the multiple scattering (KKR) equations for the two dimensional photonic crystals in the long wavelength limit. Different approximations of the electric and magnetic susceptibilities are presented from a unified pseudopoten
tial point of view. The nature of the so called plasmon-polariton bands are clarified. Its frequency as a function of the wire radius is discussed.
We studied the response of a ferromagnet-insulator-normal metal tunnel structure under an external oscillating radio frequency (R.F.) magnetic field. The D. C. voltage across the junction is calculated and is found not to decrease despite the high re
sistance of the junction; instead, it is of the order of $mu V$ to $100mu V$, much larger than the experimentally observed value (100 nano-V) in the strong coupled ohmic ferromagnet-normal metal bilayers. This is consistent with recent experimental results in tunnel structures, where the voltage is larger than $mu V$s. The damping and loss of an external RF field in this structure is calculated.
