Diffractive Nanophotonics

Diffractive Nanophotonics demonstrates the utility of the well-established methods of diffractive computer optics in solving nanophotonics tasks. It is concerned with peculiar properties of laser light diffraction by microoptics elements with nanoscale features and light confinement in subwavelength space regions. Written by recognized experts in this field, the book covers in detail a wide variety of advanced methods for the rigorous simulation of light diffraction. The authors apply their expertise to addressing cutting-edge problems in nanophotonics.

Chapters consider the basic equations of diffractive nanophotonics and related transformations and numerical methods for solving diffraction problems under strict electromagnetic theory. They examine the diffraction of light on two-dimensional microscopic objects of arbitrary shape and present a numerical method for solving the problem of diffraction on periodic diffractive micro- and nanostructures. This method is used in modern trends in nanophotonics, such as plasmonics, metamaterials, and nanometrology. The book describes the simulation of electromagnetic waves in nanophotonic devices and discusses two methods of calculating the spatial modes of microstructured photonic crystal fibres—a relatively new class of optical fibres with the properties of photonic crystals.

The book explains the theory of paraxial and non-paraxial laser beams with axial symmetry and an orbital angular momentum—called vortex beams—which are used for optical trapping and rotating micro- and nanoparticles in a ring in the cross-sectional plane of the beam. The final chapter discusses methods for calculating the force and torque exerted by the electromagnetic field focused onto the microparticle of arbitrary form, whose dimensions are comparable with the wavelength of light.

《衍射納米光子學》展示了衍射計算機光學在解決納米光子學問題上的實用性。本書關注激光光線通過具有納米級特徵的微光學元件時的奇特特性，以及在次波長空間區域中的光束束縛。由該領域的知名專家撰寫，本書詳細介紹了一系列先進的方法，用於嚴格模擬光的衍射。作者們運用自己的專業知識來解決納米光子學的前沿問題。

各章節考慮了衍射納米光子學的基本方程式及相關轉換，以及在嚴格的電磁理論下解決衍射問題的數值方法。他們研究了光在任意形狀的二維微觀物體上的衍射，並提出了一種解決周期性衍射微觀和納米結構衍射問題的數值方法。這種方法被應用於納米光子學的現代趨勢，如等離子體學、超材料和納米計量學。本書描述了納米光子學器件中電磁波的模擬，並討論了計算微結構光子晶體纖維的空間模式的兩種方法，這是一種具有光子晶體特性的相對較新的光纖類型。

本書解釋了軸對稱和軌道角動量的軸向對稱激光光束的理論，這些光束被用於光學困境和旋轉微觀和納米粒子，形成光束的橫截面平面上的一個環。最後一章討論了計算電磁場對與光波長相當尺寸的任意形狀微粒施加的力和力矩的方法。