Nanophotonics deals with the diffraction of light from objects with nanoscale features. This book addresses cutting-edge problems in the field of nanophotonics as well as a wide variety of advanced methods for the rigorous simulation of light diffraction by nanophotonics devices. It also treats issues of optical trapping, micro- and nano-manipulation based on laser vortex beams, and tight subwavelength focusing of laser light. It offers a great variety of numerical examples with detailed parameters so any reader can reproduce the calculations and compare the results of their own with those given in the book.