Probing polaritons in the mid- to far-infrared
Probing polaritons in the mid- to far-infrared
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DOI：
10.1063/1.5090777
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发表时间：
2019-05-21
影响因子：
3.2
通讯作者：
Caldwell, J. D.
中科院分区：
文献类型：
--
作者：
Folland, T. G.;Nordin, L.;Caldwell, J. D.
与中红外至远红外光谱范围相关的长自由空间波长对相关光学和电光组件的形状因数造成了重大限制。具体地说，当前的商业光源、波导、光学组件(透镜和波片)和探测器元件大于相应的衍射极限，导致图像分辨率降低和光学系统笨重，对商业、医疗和国防相关领域的许多成像和传感应用具有有害影响。纳米光子学领域的最终目标是在深亚波长、纳米尺度上限制和操纵光，这为克服这些限制提供了重要的机会。纳米尺度光学在红外中的演示可以通过利用极化子来实现，极化子是由耦合到电磁激励的材料中的振荡电荷组成的准粒子。然而，主要的极化材料以及用于测量中到远红外中的这些准粒子的表征技术和方法需要与在紫外光、可见光和近红外中的类似努力不同的方法。本教程的目的是概述激发、操纵和探测中红外至远红外波长范围内的偏振子的基本材料、工具和技术，为那些进入这一令人兴奋的新兴研究领域的人提供亚波长和纳米尺度光学的一般指南。由AIP出版公司授权出版。
The long free-space wavelengths associated with the mid-to far-infrared spectral range impose significant limitations on the form factor of associated optic and electro-optic components. Specifically, current commercial optical sources, waveguides, optical components (lenses and waveplates), and detector elements are larger than the corresponding diffraction limit, resulting in reduced image resolution and bulky optical systems, with deleterious effects for a number of imaging and sensing applications of interest to commercial, medical, and defense related arenas. The field of nanophotonics, where the ultimate objective is to confine and manipulate light at deeply subwavelength, nanometer length scales, offers significant opportunities to overcome these limitations. The demonstration of nanoscale optics in the infrared can be achieved by leveraging polaritons, quasiparticles comprised of oscillating charges within a material coupled to electromagnetic excitations. However, the predominant polaritonic materials and the characterization techniques and methods implemented for measuring these quasiparticles in the mid-to far-IR require a different approach with respect to similar efforts in the ultraviolet, visible, and near-IR. The purpose of this tutorial is to offer an overview of the basic materials, tools, and techniques for exciting, manipulating, and probing polaritons in the mid-to far-infrared wavelength range, providing a general guide to subwavelength and nanoscale optics for those entering this exciting and burgeoning research field. Published under license by AIP Publishing.