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文件名称：Physics of negative index material
文件大小：33.88MB
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更新时间：2015-12-12 17:57:45
photonic crystal, negative inex material
There are many potentially interesting phenomena that can be obtained with
wave refraction in the “wrong” direction, what is commonly now referred to
as negative refraction. All sorts of physically new operations and devices come
to mind, such as new beam controlling components, reflectionless interfaces,
flat lenses, higher quality lens or “super lenses,” reversal of lenses action,
new imaging components, redistribution of energy density in guided wave
components, to name only a few of the possibilities. Negative index materials
are generally, but not always associated with negative refracting materials,
and have the added property of having the projection of the power flow or
Poynting vector opposite to that of the propagation vector. This attribute
enables the localized wave behavior on a subwavelength scale, not only inside
lenses and in the near field outside of them, but also in principle in the far field
of them, to have field reconstruction and localized enhancement, something
not readily found in ordinary matter, referred to as positive index materials.