Journal
NANO LETTERS
Volume 12, Issue 11, Pages 5784-5790Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl303095s
Keywords
Surface plasmon polaritons; all-optical logic gates; plasmonic slot waveguide; linear interference effect
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Funding
- National Key Basic Research Program of China [2013CB328704]
- National Natural Science Foundation of China [61077027, 11134001, 11121091, 90921008]
- program for New Century Excellent Talents in University
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We report realizations of nanoscale integrated all-optical XNOR, XOR, NOT, and OR logic gates using plasmonics slot waveguides based on linear interference between surface plasmon polariton modes. The miniature device size with.. lateral dimensions smaller than 5 mu m,. precisely controlled optical phase difference, and quasi-monochromatic surface plasmon. polariton modes excited by a continuous wave 830 nm laser beam ensure a high intensity contrast ratio of 24 dB between the output logic states 1 and 0. Compared with previous reported results, the. intensity contrast ratio is enhanced 4-fold, whereas the lateral dimension is reduced 4-fold. These compact. logic devices are stable, robust, free from environmental impact, and much suitable for practical on chip applications These also provide a means to construct all-optical devices and nanophotonic processors
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