Jens Samland, Bárbara Canto, Martin Otto, Holger Lerch, Jens Bolten, Stephan Suckow, Thorsten Wahlbrink and Max C. Lemme*,
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Graphene Heaters for Tunable Mach–Zehnder Interferometers in Silicon Photonics at the C-Band Wavelength
Graphene micro heaters for thermally tunable photonic devices have great potential to improve the performance of Mach–Zehnder interferometers (MZI), because their low optical absorption allows placing them close to the photonic waveguides. In this work, we study MZI switches on the silicon-on-insulator (SOI) platform operated with graphene heaters at C-band wavelengths. We experimentally realize two different heater designs, vary the heater geometry of each design, investigate the switch performance, and compare it to state-of-the-art simulations. The best devices exhibit a Pπτ = 16 mW · 17 μs = 272 mW·μs and an extinction ratio of 28 dB. Our study demonstrates a precise and reliable fabrication process for graphene heaters with different geometry whose behavior can be well predicted with simulations.
期刊介绍：
ACS Applied Optical Materials is an international and interdisciplinary forum to publish original experimental and theoretical including simulation and modeling research in optical materials complementing the ACS Applied Materials portfolio. With a focus on innovative applications ACS Applied Optical Materials also complements and expands the scope of existing ACS publications that focus on fundamental aspects of the interaction between light and matter in materials science including ACS Photonics Macromolecules Journal of Physical Chemistry C ACS Nano and Nano Letters.The scope of ACS Applied Optical Materials includes high quality research of an applied nature that integrates knowledge in materials science chemistry physics optical science and engineering.
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