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Sharp Focusing of Laser Light

Autor Victor V. Kotlyar
en Limba Engleză Hardback – dec 2019
The reader will learn in which ways the light can be "confined" within a subwavelength region of size smaller than half a wavelength. Strictly within the focal spot, all degrees of freedom of light interact and manifest themselves in a dramatic way. The size and shape of the focal spot and the magnitude of side-lobes depend on the polarization state alongside phase and amplitude distributions of a light beam. The reader will learn techniques using which inhomogeneously (i.e., azimuthally and radially) polarized optical beams can be focused. In the sharp focus, exotic phenomena can occur, including the negative propagation of light and a toroidal optical flow. Through the entire book, the numerical simulation is performed using the rigorous solution of Maxwell's equations based on a Finite-Difference Time-Domain (FDTD) approach, which makes the results of modeling highly reliable. The photonic components, including optical metasurfaces, discussed in the book have been implemented using state-of-the-art techniques of electron beam writing and reactive ion-beam etching of microrelief. The book contains two chapters concerned with photonics hot spots, which deal with the control of light by means of optical metasurfaces and the generation of an energy backflow in the region of sharp focus of a laser beam. One more hot topic the book deals with is diffractive polarization converters implemented as subwavelength diffraction gratings to convert polarization of light. By way of illustration, such converters are shown to perform linear-to-radial or linear-to-azimuthal polarization conversion. The book describes advanced photonic components fabricated by the authors to perform sharp focusing of light, including binary zone plates, binary axicons, a planar photonic crystal lens, diffraction polarization converters, and metalenses. This book is a 'must buy' for individuals and institutions studying cutting edge areas of optics.
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Specificații

ISBN-13: 9780367364441
ISBN-10: 0367364441
Pagini: 456
Dimensiuni: 156 x 235 mm
Greutate: 0 kg
Editura: Taylor & Francis Ltd.