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Graphene-based electro-absorption modulator integrated in a passive polymer waveguide platform

: Kleinert, M.; Herziger, F.; Reinke, P.; Zawadzki, C.; Felipe, D. de; Brinker, W.; Bach, H.-G.; Keil, N.; Maultzsch, J.; Schell, M.

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Optical Materials Express 6 (2016), No.6, pp.1800-1807, 8 pp.
ISSN: 2159-3930
Journal Article, Electronic Publication
Fraunhofer HHI ()

A graphene-based electro-absorption modulator has been integrated into a passive polymer waveguide platform for the first time. The opto-electronic properties of the structure are investigated with numerical simulations and measurements of a fabricated device. The graphene layers transferred to the polymer substrate were analyzed by means of Raman spectroscopy and the results indicate a high crystalline quality of the two-dimensional material. The voltage-dependent transmission through a 25 µm long device has been measured in the telecommunications-relevant wavelength range between 1500 nm and 1600 nm yielding an extinction ratio of 0.056 dB/µm.