EAN: 9783319242514

SPRINGERBRIEFS IN PHYSICS DIFFRACTIVE OPTICS ...

In this book the authors present several examples of techniques used to overcome the Abby
diffraction limit using flat and 3D diffractive optical elements  photonic crystal lenses 
photonic jets  and surface plasmon diffractive optics. The structures discussed can be used in
the microwave and THz range and also as scaled models for optical frequencies. Such
nano-optical microlenses can be integrated  for example  into existing semiconductor
heterostructure platforms for next-generation optoelectronic applications. Chapter 1 considers
flat diffractive lenses and innovative 3D radiating structures including a conical
millimeter-wave Fresnel zone plate (FZP) lens proposed for subwavelength focusing. In chapter 2
the subwavelength focusing properties of diffractive photonic crystal lenses are considered and
it is shown that at least three different types of photonic crystal lens are possible. With the
aim of achieving subwavelength focusing  in chapter 3 an alternative mechanism to produce
photonic jets at Terahertz frequencies (terajets) using 3D dielectric particles of arbitrary
size (cuboids) is considered. A scheme to create a 2D teraknife using dielectric rods is also
discussed. In the final chapter the successful adaptation of free-space 3D binary
phase-reversal conical FZPs for operation on surface plasmon-polariton (SPP) waves demonstrates
that analogues of Fourier diffractive components can be developed for in-plane SPP 3D optics.
Reviewing theory  modelling and experiment  this book will be a valuable resource for students
and researchers working on nanophotonics and sub-wavelength focusing and imaging.

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