Journal
SCIENCE
Volume 335, Issue 6067, Pages 447-450Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1214383
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Funding
- Defense Threat Reduction Agency [HDTRA1-10-1-0106]
- Air Force Office of Scientific Research [FA9550-08-1-0379]
- NSF [ECCS-0925759]
- NIH [1R01RR026273-01]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0925759] Funding Source: National Science Foundation
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A passive optical diode effect would be useful for on-chip optical information processing but has been difficult to achieve. Using a method based on optical nonlinearity, we demonstrate a forward-backward transmission ratio of up to 28 decibels within telecommunication wavelengths. Our device, which uses two silicon rings 5 micrometers in radius, is passive yet maintains optical nonreciprocity for a broad range of input power levels, and it performs equally well even if the backward input power is higher than the forward input. The silicon optical diode is ultracompact and is compatible with current complementary metal-oxide semiconductor processing.
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