Ultra small mode volume defect cavities in spatially ordered and disordered metamaterials
Ultra small mode volume defect cavities in spatially ordered and disordered metamaterials
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DOI：
10.1063/1.4801308
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发表时间：
2013-04-08
影响因子：
4
通讯作者：
Lerosey, Geoffroy
中科院分区：
文献类型：
--
作者：
Kaina, Nadege;Lemoult, Fabrice;Lerosey, Geoffroy
在这封信中，我们研究了由谐振电线制成的超材料，其空间尺度远小于自由空间波长，并且我们表明它们呈现出对位置无序不敏感的杂化带。我们通过实验证明了无序和有序样品中的缺陷空腔，并证明，与光子晶体中设计的空腔类似，这些空腔可以呈现非常高的品质因数。此外，我们还发现，由于晶胞的深亚波长特性，它们显示的模式体积比波长立方体小得多。我们强调这种类型的结构可以缩小到接近几个趋肤深度的周期。我们的方法为有序和无序超材料中深亚波长尺度的波的限制和操纵铺平了道路。 (C) 2013 AIP 出版有限责任公司。
In this letter, we study metamaterials made out of resonant electric wires arranged on a spatial scale much smaller than the free space wavelength, and we show that they present a hybridization band that is insensible to positional disorder. We experimentally demonstrate defect cavities in disordered and ordered samples and prove that, analogous to those designed in photonic crystals, those cavities can present very high quality factors. In addition, we show that they display mode volumes much smaller than a wavelength cube, owing to the deep subwavelength nature of the unit cell. We underline that this type of structure can be shrunk down to a period close of a few skin depth. Our approach paves the way towards the confinement and manipulation of waves at deep subwavelength scales in both ordered and disordered metamaterials. (C) 2013 AIP Publishing LLC.