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Ge-on-Si modulators operating at mid-infrared wavelengths up to 8??μm

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Abstract

We report mid-infrared Ge-on-Si waveguide-based PIN diode modulators operating at wavelengths of 3.8 and 8?μm. Fabricated 1-mm-long electro-absorption devices exhibit a modulation depth of >35??dB with a 7?V forward bias at 3.8?μm, and a similar 1-mm-long Mach–Zehnder modulator has a Vπ·L of 0.47??V·cm. Driven by a 2.5Vpp RF signal, 60?MHz on-off keying modulation was demonstrated. Electro-absorption modulation at 8?μm was demonstrated preliminarily, with the device performance limited by large contact separation and high contact resistance.

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DOI:10.1364/PRJ.7.000828

所属栏目:Integrated Photonics

基金项目:Engineering and Physical Sciences Research Council (EPSRC)10.13039/501100000266; Royal Academy of Engineering10.13039/501100000287; National Research Foundation Singapore (NRF)10.13039/501100001381; Royal Society10.13039/501100000288; European project Cosmicc; China Scholarship Council (CSC)10.13039/501100004543; State Key Laboratory of Advanced Optical Communication Systems and Networks, China10.13039/501100011416; European Union’s Seventh Framework Programme10.13039/501100004963;

收稿日期:2018-12-19

录用日期:2019-05-27

网络出版日期:2019-07-11

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Tiantian Li:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UKState Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
Milos Nedeljkovic:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Nannicha Hattasan:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Wei Cao:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Zhibo Qu:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Callum G. Littlejohns:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UKSilicon Technologies Centre of Excellence, Nanyang Technological University, Singapore 639798, Singapore
Jordi Soler Penades:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Lorenzo Mastronardi:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Vinita Mittal:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Daniel Benedikovic:Centre de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Université Paris-Saclay, C2N—Palaiseau, 91120 Palaiseau, France
David J. Thomson:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Frederic Y. Gardes:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Hequan Wu:State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
Zhiping Zhou:State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
Goran Z. Mashanovich:Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK

联系人作者:Goran Z. Mashanovich(g.mashanovich@soton.ac.uk)

备注:Engineering and Physical Sciences Research Council (EPSRC)10.13039/501100000266; Royal Academy of Engineering10.13039/501100000287; National Research Foundation Singapore (NRF)10.13039/501100001381; Royal Society10.13039/501100000288; European project Cosmicc; China Scholarship Council (CSC)10.13039/501100004543; State Key Laboratory of Advanced Optical Communication Systems and Networks, China10.13039/501100011416; European Union’s Seventh Framework Programme10.13039/501100004963;

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引用该论文

Tiantian Li, Milos Nedeljkovic, Nannicha Hattasan, Wei Cao, Zhibo Qu, Callum G. Littlejohns, Jordi Soler Penades, Lorenzo Mastronardi, Vinita Mittal, Daniel Benedikovic, David J. Thomson, Frederic Y. Gardes, Hequan Wu, Zhiping Zhou, and Goran Z. Mashanovich, "Ge-on-Si modulators operating at mid-infrared wavelengths up to 8??μm," Photonics Research 7(8), 828-836 (2019)

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