Optical absorption in graphene integrated on silicon waveguides

By Huan Li, Y. Anugrah, Steven J. Koester, Mo Li. 2012

209 citations recorded by the source corpus.

To fully utilize graphene's remarkable optical properties for optoelectronic applications, it needs to be integrated in planar photonic systems. Here, we demonstrate integration of graphene on silicon photonic circuits and precise measurement of the optical absorption coefficient in a graphene/waveguide hybrid structure. A method based on Mach-Zehnder interferometry is employed to achieve high measurement precision and consistency, yielding a maximal value of absorption coefficient of 0.2 dB/μm when graphene is located directly on top of the waveguide. The averaged results obtained from a large number of samples agree with theoretical model utilizing the universal ac conductivity in graphene. Our work provides an important guide for the design and optimization of integrated graphene optoelectronic devices.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a537846b523ed720b35f3d8272cbf647ec413291

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In Materials Chemistry

1. Behrad Radfar
2. Shabnam Larimian
3. Mohammadreza Kolahdouz
4. H. Radamson
5. F. Akbar

Citations in the corpus

• Graphene synthesis, characterization and its applications in nanophotonics, nanoelectronics, and nanosensing (2015, background): “The graphene sheet is transferred on a Si waveguide which is isolated by oxide material [159].”