期刊
NATURE PHOTONICS
卷 12, 期 1, 页码 40-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41566-017-0071-6
关键词
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资金
- European Union Graphene Flagship Project
- ERC Grant Hetero2D
- EPSRC [EP/509 K01711X/1, EP/K017144/1, EP/N010345/1, EP/M507799/5101, EP/L016087/1]
- EPSRC [EP/K01711X/1, EP/G042357/1, EP/G030480/1, EP/M507799/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M507799/1, EP/G030480/1, EP/K017144/1, EP/N010345/1, EP/K01711X/1, EP/G042357/1] Funding Source: researchfish
The modulator is a key component in optical communications. Several graphene-based amplitude modulators have been reported based on electro-absorption. However, graphene phase modulators (GPMs) are necessary for functions such as applying complex modulation formats or making switches or phased arrays. Here, we present a 10 Gb s(-1) GPM integrated in a Mach-Zehnder interferometer configuration. This is a compact device based on a graphene-insulator-silicon capacitor, with a phase-shifter length of 300 mu m and extinction ratio of 35 dB. The GPM has a modulation efficiency of 0.28 V cm at 1,550 nm. It has 5 GHz electro-optical bandwidth and operates at 10 Gb s-1 with 2 V peak-to-peak driving voltage in a push-pull configuration for binary transmission of a non-return-to-zero data stream over 50 km of single-mode fibre. This device is the key building block for graphene-based integrated photonics, enabling compact and energy-efficient hybrid graphene-silicon modulators for telecom, datacom and other applications.
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