Graphene-silicon phase modulators with gigahertz bandwidth

被引：288

作者：

Sorianello, V. ^{[1
]}

Midrio, M. ^{[2
]}

Contestabile, G. ^{[3
]}

Asselberghs, I. ^{[4
]}

Van Campenhout, J. ^{[4
]}

Huyghebaert, C. ^{[4
]}

Goykhman, I. ^{[5
]}

Ott, A. K. ^{[5
]}

Ferrari, A. C. ^{[5
]}

Romagnoli, M. ^{[1
]}

机构：

[1] Consorzio Nazl Telecomunicaz CNIT, Photon Networks & Technol Natl Lab, Pisa, Italy

[2] Univ Udine, Consorzio Nazl Telecomunicaz CNIT, Udine, Italy

[3] Consorzio Nazl Telecomunicaz CNIT, Scuola Super St Anna, Pisa, Italy

[4] IMEC, Leuven, Belgium

[5] Univ Cambridge, Cambridge Graphene Ctr, Cambridge, England

来源：

NATURE PHOTONICS | 2018年 / 12卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

MACH-ZEHNDER MODULATORS; OPTICAL MODULATOR; RAMAN-SPECTROSCOPY; HYBRID SYSTEMS; HIGH-SPEED; DEVICES; OPTIMIZATION; PHOTONICS;

D O I：

10.1038/s41566-017-0071-6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：40 / +

页数：6

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