Review on Microwave Metamaterial Structures for Near‐Field Imaging

Abstract

In the past decade, metamaterials have attracted a lot of attention because of their abilities to exhibit unusual electromagnetic properties. These properties are exploited in designing functional components and devices for many potential applications. In this chapter, we review the theory and design of metamaterial structures for microwave near-field imaging/microscopy. The chapter highlights metamaterial microwave components to obtain super-resolution and manipulating subwavelength images. Moreover, a review on surface plasmons manipulation at microwave frequencies is presented as a technique to enhance the transmission for near-field microscopy. The chapter presents as well a survey on the near-field imaging instrumentation and its advances mainly for microwave and THz regimes.

Breaking the Diffraction Limit Manifold Using Specially Designed Metamaterial Split Ring Resonator

“…Different types of metamaterial structural units and surfaces have been widely proposed recently for various modes of sensors [1][2][3][4][5][6]. Near field microwave probes can confine evanescent fields to regions having dimensions much smaller than operating wavelength, and hence they are able to resolve sub-wavelength features and thereby provide a resolution much higher than the classical Abbe limit [7,8]. Earlier microwave near-field techniques mainly focused on a topology of microstrip line resonator terminated with a sharpened tip or a small loop and were reported to achieve a better resolution in dielectrics [9][10][11].…”