NDLI: Principles of electromagnetic waves in metasurfaces

Content Provider	Springer Nature Link
Author	Luo, XianGang
Copyright Year	2015
Abstract	Metasurfaces are artificially structured thin films with unusual properties on demand. Different from metamaterials, the metasurfaces change the electromagnetic waves mainly by exploiting the boundary conditions, rather than the constitutive parameters in three dimensional (3D) spaces. Despite the intrinsic similarities in the operational principles there is not a universal theory available for the understanding and design of metasurface-based devices. In this article, we propose the concept of metasurface waves (M-waves) and provide a general theory to describe the principles of them. Most importantly, it is shown that the M-waves share some fundamental properties such as extremely short wavelength, abrupt phase change and strong chromatic dispersion, which make them different from traditional bulk waves. It is shown that these properties can enable many important applications such as subwavelength imaging and lithography, planar optical devices, broadband anti-reflection, absorption and polarization conversion. Our results demonstrated unambiguously that traditional laws of diffraction, refraction, reflection and absorption should be revised by using the novel properties of M-waves. The theory provided here may pave the way for the design of new electromagnetic devices and further improvement of metasurfaces. The exotic properties of metasurfaces may also form the foundations for two new sub-disciplines called “subwavelength surface electromagnetics” and “subwavelength electromagnetics”.
Starting Page	1
Ending Page	18
Page Count	18
File Format	PDF
ISSN	16747348
Journal	Science in China Series G
Volume Number	58
Issue Number	9
e-ISSN	18691927
Language	English
Publisher	Science China Press
Publisher Date	2015-09-22
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	metasurface subwavelength structure diffraction limit flat lens perfect absorption Physics Classical Continuum Physics Astronomy, Observations and Techniques
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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