Journal
NANO LETTERS
Volume 11, Issue 10, Pages 4357-4361Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl2024855
Keywords
Surface plasmon polariton; broad band focusing wavelength demultiplexer; in-plane photonic integration
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Funding
- State Key Program for Basic Research of China [2012CB921501, 2010CB630703, 2009CB030501, 2011CBA00200]
- National Natural Science Foundation of China [11174136, 10974090, 60990320, 11021403]
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On the basis of a novel phase modulation method by in-plane diffraction processes, a well-designed nanoarray on metal surface is proposed to realize a broad band focusing (bandwidth similar to 100 nm) and a demultiplexing element (resolution similar to 12 nm) of surface plasmon polariton (SPP) waves. Moreover, sublattice arrays are developed to achieve an improved demultiplexer and confocal SPP beams. The proposed scheme with implemented functionalities is designed totally in planar dimension, which is free of the SPP coupling process and indicates more practical application in photonic integrations.
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