学术动态

Highly-efficient and mulitifunctional manipulation of electromagnetic wave-fronts with metasurfaces

来源:物理学院2017/09/11 10:26

报告题目:Highly-efficient and mulitifunctional manipulation of

electromagnetic wave-fronts with metasurfaces

报告时间:913日(星期三)上午10::15

报告地点:物理学院A504

报告摘要:

Recently, gradient metasurfaces, have paved a new direction to the field of metamaterial with many remarkable achievements, including generalized Snell’s law, new bridge to couple surface wave,  meta-hologramsplanar optical devices, etc.  In this talk, we will present how to experimentally realize the multifunctional operation based on the polarization-dependent metasurfaces in both reflection and transmission geometry in microwave regime. Firstly, we will present that the functionality of the metasurface can be freely switched between focusing and surface wave excitation by rotating the polarization direction of the input linear polarized electromagnetic wave in transmission or reflection regime. Then, we will present a new type of microwave meta-devices to efficiently manipulate EM waves in both reflection and transmission space, with experimental demonstration in microwave. These findings significantly expand the capabilities of metasurfaces in controlling EM waves, which can stimulate high-performance multi-functional meta-devices facing more challenging and diversified application demands.

Fig.. Schematics of the polarization-controlled bifunctional metasurfaces.

[1] Sun, S. et al. Nat Mater 11, 426-431 (2012)

[2] Cai, T. et al. IEEE Trans. Antennas Propag.,63 (12),5629-5636 (2015)

[3] Cai, T. et al. Adv. Opt. Mater. 5, 1600506 (2017)

[4] Cai, T. et al. Phys. Rev. Applied (2017 accepted)


报告人简介:

何琼, 1997中国海洋大学学士; 2008法国巴黎第十一大学物理系博士;2008-2014 复旦大学物理系博士后;2016- 复旦大学物理系副教授。截止目前,在Nature Materials, Light: Science & Applications, PRL, Advanced Optical Materials, Phys. Rev. Applied, PRB, OL, OE等学术刊物发表论文40多篇,引用1千余次。


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