黄殷

副教授 硕士生导师

入职时间:2013-07-01

所在单位:物理与电子学院

学历:博士研究生毕业

性别:男

学位:博士学位

在职信息:在职

毕业院校:美国路易斯安那州立大学

学科:电子科学与技术

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2018年论文发表

发布时间:2020-04-25

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Our paper "Switching photonic nanostructures between cloaking and superscattering regimes using phase-change materials" by Yin Huang*, Yuecheng Shen, Changjun Min, and Georgios Veronis is accepted in Optics material express.


Abstract: We show that phase-change materials can be used to switch photonic nanostructures between cloaking and superscattering regimes at mid-infrared wavelengths. More specifically, we investigate the scattering properties of subwavelength three-layer cylindrical structures in which the material in the outer shell is the phase-change material Ge2Sb2Te5 (GST). We first show that, when GST is switched between its amorphous and crystalline phases, properly designed electrically small structures can switch between resonant scattering and cloaking invisibility regimes. The contrast ratio between the scattering cross sections of the cloaking invisibility and resonant scattering regimes reaches almost unity.We then also show that larger, moderately small cylindrical structures can be designed to switch between superscattering and cloaking invisibility regimes, when GST is switched between its crystalline and amorphous phases. The contrast ratio between the scattering cross sections of cloaking invisibility and superscattering regimes can be as high as ~ 93%. Our results could be potentially important for developing a new generation of compact reconfigurable optical devices.


      

                      


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