Subwavelength imaging of a point source based on two-dimensional photonic crystals

Subwavelength imaging of a point source based on two-dimensional photonic crystals

A new two-dimensional (2D) photonic crystal (PC) structure with effective refractive index approaching -1, consisting of periodic array air holes in silicon, is proposed. The light radiated from a point source can form an image through a single wedge PC. Numerical results show that the half-width of...

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Veröffentlicht in:Optics letters 2016-08, Vol.41 (16), p.3833-3835
Hauptverfasser: Ma, Hongliang, Liang, Binming, Zhuang, Songlin, Chen, Jiabi, Jiang, Qiang, Ding, Junwei
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container_end_page 3835
container_issue 16
container_start_page 3833
container_title Optics letters
container_volume 41
creator Ma, Hongliang
Liang, Binming
Zhuang, Songlin
Chen, Jiabi
Jiang, Qiang
Ding, Junwei
description A new two-dimensional (2D) photonic crystal (PC) structure with effective refractive index approaching -1, consisting of periodic array air holes in silicon, is proposed. The light radiated from a point source can form an image through a single wedge PC. Numerical results show that the half-width of the image reaches 0.44λ, which is lower than half of the incident wavelength. In addition, the light through the combination of two of the same PCs can also form subwavelength imaging of which the half-width reaches 0.67λ, and the image almost flipped 180° compared with a point source.
doi_str_mv 10.1364/OL.41.003833
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