RT - Journal Article T1 - Intense Linearly-polarized Laser Pulse Focusing via Interaction with Periodic Lattice of Nanoparticles JF - opsi YR - 2015 JO - opsi VO - 21 IS - 0 UR - http://opsi.ir/article-1-818-en.html SP - 1559 EP - 1562 K1 - laser K1 - nanoparticles lattice K1 - nonlinear wave equation K1 - self-focusing K1 - spot size AB - The self-focusing of an intense laser beam propagating through a periodic lattice of nanoparticles is studied. Using a perturbative method, wave equation describing the nonlinear interaction of intense laser beams with nanoparticles is derived. The evolution of laser spot size with Gaussian profile for the linear polarizations is considered. It is found that the ratio of nanoparticles radius to separation have a crucial role in the self-focusing property. With available physical parameters, self-focusing can be observed from near IR to UV spectrum ranges. LA eng UL http://opsi.ir/article-1-818-en.html M3 ER -