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arXiv 1409.4255physics.opticscond-mat.mtrl-sci
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微波区可重构光致超材料

Reconfigurable photoinduced metamaterials in the microwave regime

Carlo Rizza, Alessandro Ciattoni, Francesco De Paulis, Elia Palange, Antonio Orlandi, Lorenzo Columbo, Franco Prati

摘要:

我们研究了在千兆赫频率下的光学可重构介电超材料。更准确地说,我们研究了微波响应的亚波长光栅光学印到半导体板。在均匀化制度,我们分析评估的普通和非凡的有效介电常数张量的分量,考虑到光载流子动力学描述的双极扩散方程。我们分析了半导体参数对千兆赫超材料响应的影响,通过改变光生光栅,这种超材料可以高度重构,并且可以表现出显着的各向异性行为。

英文摘要:

We investigate optically reconfigurable dielectric metamaterials at gigahertz frequencies. More precisely, we study the microwave response of a subwavelength grating optically imprinted into a semiconductor slab. In the homogenized regime, we analytically evaluate the ordinary and extraordinary component of the effective permittivity tensor by taking into account the photo-carrier dynamics described by the ambipolar diffusion equation. We analyze the impact of semiconductor parameters on the gigahertz metamaterial response which turns out to be highly reconfigurable by varying the photogenerated grating and which can show a marked anisotropic behavior.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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