Robuta

https://meetings-archive.aps.org/mar/2005/n16/6/ Nonlinear and Active Optics in Nanolenses - Nuclear Spin Induced Oscillatory Current in Spin... We consider surface plasmon amplification by stimulated emission of radiation (SPASER) and second harmonic generation (SHG) in an effective nanolens. Such a nan active opticsnuclear spinnonlinear