偏振模式及光源不敏感的光子晶体平板透镜
投稿时间:2021-05-28  修订日期:2021-06-24  点此下载全文
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作者单位邮编
刘建军 湖南大学物理与微电子科学学院 410082
岑源 湖南大学物理与微电子科学学院 
谢建斓 湖南大学物理与微电子科学学院 
中文摘要:光子晶体平板透镜在超分辨聚焦成像领域具有广泛应用前景且已开展了深入研究,但以往所研究的透镜都只适用于特定的偏振模式或特定的入射光源。为此,本文提出了一种散射子尺寸梯度型光子晶体平板透镜。该平板透镜在TM偏振和TE偏振模式下可同时实现对点光源的成像及对平面波的聚焦,且在TM偏振模式下成像及聚焦均突破了衍射极限,而在TE模式下均实现了亚波长成像及聚焦。该平板透镜无需任何偏振附加组件便可实现偏振不敏感成像及聚焦,有望用于设计多功能新型光学偏振不敏感成像及聚焦器件,可应用于实时生物显示、高密度光存贮及微电子光刻等领域,提高梯度光子晶体平板透镜的应用潜力。
中文关键词:光子晶体,点光源成像,平面波聚焦,偏振不敏感,平板透镜
 
Photonic crystal flat lens for polarization mode and light source insensitively
Abstract:The photonic crystal (PC) flat lens has broad application prospects in the field of super-resolution imaging and it has been researched deeply, but the lenses studied in the past are only suitable for specific polarization mode or specific incident light source. To this end, we propose a kind of PC flat lens with scatterer-size gradient. This flat lens can simultaneously realize point source imaging and plane wave focusing in TM and TE polarization modes, and break through the diffraction limit in TM polarization mode, and realize sub-wavelength imaging and focusing in TE polarization mode. This flat lens can realize polarization-insensitive imaging and focusing without any additional polarization components. It is expected to be used in the design of multi-functional optical polarization-insensitive imaging and focusing devices, and can be applied to real-time biological display, high-density optical storage and microelectronic lithography, and improve the application potential of gradient PC flat lens.
keywords:photonic crystal, point source imaging, plane wave focusing, polarization mode insensitive, flat lens
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