金属纳米壳颗粒链阵列近红外超分辨成像
Near-Infrared Super Resolution Imaging with Metallic Nanoshell Particle Chain Array
摘要：
提出了一种无透镜、无反射镜、由金属纳米壳颗粒链阵列构成的近红外超分辨成像系统。该成像阵列能够以非相干和相干的方式对偶极子源的近场分量进行等离子体传输，并在输出平面上重建超分辨率图像。通过调节金属纳米壳层粒子的参数，孤立的纳米壳层粒子的等离子体共振带向近红外区红移。获得了近红外超分辨率图像。利用有限元法计算了成像过程中不同平面上的场强分布，发现该阵列在近红外波段具有超分辨成像能力。我们还表明，成像高度依赖于偶极子源的相干性和图像阵列的距离。
英文摘要：
We propose a near-infrared super resolution imaging system without a lens or a mirror but with an array of metallic nanoshell particle chain. The imaging array can plasmonically transfer the near-field components of dipole sources in the incoherent and coherent manners and the super resolution images can be reconstructed in the output plane. By tunning the parameters of the metallic nanoshell particle, the plasmon resonance band of the isolate nanoshell particle red-shifts to the near-infrared region. The near-infrared super resolution images are obtained subsequently. We calculate the field intensity distribution at the different planes of imaging process using the finite element method and find that the array has super resolution imaging capability at near-infrared wavelengths. We also show that the image formation highly depends on the coherence of the dipole sources and the image-array distance.
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