Image quality deterioration due to phase fluctuation in layered superlens
Image quality deterioration due to phase fluctuation in layered superlens
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分层超级透镜中的相位波动导致图像质量恶化
DOI:
10.1016/j.ijleo.2009.07.001
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发表时间:
2010-11
期刊:
影响因子:
3.1
通讯作者:
Mingkai Liu
中科院分区:
文献类型:
--
作者:
Chongjun Jin;Mingkai Liu
Optical transfer function (OTF) and image spectrums of the layered metal (M)–dielectric (D) superlenses (MD)n (where n is the number of cycles) are analyzed via transfer matrix method and effective-medium model. It is shown that the magnitude of OTF (MTF) with a high cutoff wave vector does not guarantee high resolution; the fluctuation of phase of OTF (PTF) is also a prime factor causing superlens imaging distortion. When the layered metal–dielectric superlenses have a small number of cycles, we find that the different types of superlenses (such as (MD)nM, (MD)n, and (DM)nD) with the same effective permittivity have totally different performances; the superlens with (DM)nD arrangement has the best performance; this will be valuable for designing layered metal–dielectric superlenses with less cycles.
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