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Observation of optically induced transparency effect in silicon nanophotonic wires with graphene
Zhejiang Univ. (China).
Zhejiang Univ. (China).
Zhejiang Univ. (China).
Zhejiang Univ. (China).
2014 (engelsk)Inngår i: Proceedings of SPIE - The International Society for Optical Engineering, 2014Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Graphene, a well-known two-dimensional sheet of carbon atoms in a honeycomb structure, has many unique and fascinating properties in optoelectronics and photonics. Integration of graphene on silicon nanophotonic wires is a promising approach to enhance light-graphene interactions. In this paper, we demonstrate on-chip silicon nanophotonic wires covered by graphene with CMOS-compatible fabrication processes. Under the illumination of pump light on the graphene sheet, a loss reduction of silicon nanophotonic wires, which is called optically induced transparency (OIT) effect, is observed over a broad wavelength range for the first time. The pump power required to generate the OIT effect is as low as ~0.1mW and the corresponding power density is about 2×10 3mW/cm2, which is significantly different from the saturated absorption effect of graphene reported previously. The extremely low power density implies a new mechanism for the present OIT effect, which will be beneficial to realize silicon on-chip all-optical controlling in the future. It also suggests a new and efficient approach to tune the carrier concentration (doping level) in graphene optically.

sted, utgiver, år, opplag, sider
2014.
Emneord [en]
all-optical, graphene, junction, low power, optically induced transparency, silicon nanophotonic wire, Integrated optoelectronics, Nanophotonics, Silicon, Transparency, Two dimensional, Wire, Fabrication process, Optically induced, Power densities, Saturated absorptions, Wavelength ranges
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Identifikatorer
URN: urn:nbn:se:kth:diva-167932DOI: 10.1117/12.2047618ISI: 000336802200008Scopus ID: 2-s2.0-84901723101ISBN: 9780819499028 (tryckt)OAI: oai:DiVA.org:kth-167932DiVA, id: diva2:818065
Konferanse
Smart Photonic and Optoelectronic Integrated Circuits XVI, 5 February 2014 through 6 February 2014, San Francisco, CA
Merknad

QC 20150608

Tilgjengelig fra: 2015-06-08 Laget: 2015-05-22 Sist oppdatert: 2015-06-08bibliografisk kontrollert

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