Position-sensitive spectral splitting with a plasmonic nanowire on silicon chip
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Hu-2013-Position-sensitive s.pdf
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Author(s)
Hu, Qing
Xu, Di-Hu
Zhou, Yu
Peng, Ru-Wen
Fan, Ren-Hao
Wang, Qian-Jin
Huang, Xian-Rong
Wang, Mu
Fang, Nicholas Xuanlai
Date Issued
October 2013
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Hu, Qing, Di-Hu Xu, Yu Zhou, Ru-Wen Peng, Ren-Hao Fan, Nicholas X. Fang, Qian-Jin Wang, Xian-Rong Huang, and Mu Wang. “Position-sensitive spectral splitting with a plasmonic nanowire on silicon chip.” Scientific Reports 3 (October 31, 2013).
Version
Final published version
Abstract
On-chip nanophotonics serves as the foundation for the new generation of information technology, but it is challenged by the diffraction limit of light. With the capabilities of confining light into (deep) subwavelength volumes, plasmonics makes it possible to dramatically miniaturize optical devices so as to integrate them into silicon chips. Here we demonstrate that by cascading nano-corrugation gratings with different periodicities on silver nanowires atop silicon, different colors can be spatially separated and chronologically released at different grating junctions. The released light frequency depends on the grating arrangement and corrugation periodicities. Hence the nanowire acts as a spectral splitter for sorting/demultiplexing photons at different nano-scale positions with a ten-femtosecond-level interval. Such nanowires can be constructed further into compact 2D networks or circuits. We believe that this study provides a new and promising approach for realizing spatiotemporal-sensitive spectral splitting and optical signal processing on nanoscales, and for general integration of nanophotonics with microelectronics.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1038/srep03095
