On-chip photonics and optoelectronics with a van der Waals material dielectric platform

Xiaoqi Cui*, Mingde Du, Susobhan Das, Hoon Hahn Yoon, Vincent Yves Pelgrin, Diao Li, Zhipei Sun

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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During the last few decades, photonic integrated circuits have increased dramatically, facilitating many high-performance applications, such as on-chip sensing, data processing, and inter-chip communications. The currently dominating material platforms (i.e., silicon, silicon nitride, lithium niobate, and indium phosphide), which have exhibited great application successes, however, suffer from their own disadvantages, such as the indirect bandgap of silicon for efficient light emission, and the compatibility challenges of indium phosphide with the silicon industry. Here, we report a new dielectric platform using nanostructured bulk van der Waals materials. On-chip light propagation, emission, and detection are demonstrated by taking advantage of different van der Waals materials. Low-loss passive waveguides with MoS2 and on-chip light sources and photodetectors with InSe have been realised. Our proof-of-concept demonstration of passive and active on-chip photonic components endorses van der Waals materials for offering a new dielectric platform with a large material-selection degree of freedom and unique properties toward close-to-atomic scale manufacture of on-chip photonic and optoelectronic devices.

Original languageEnglish
Pages (from-to)9459-9465
Issue number26
Early online date2022
Publication statusPublished - 7 Jul 2022
MoE publication typeA1 Journal article-refereed


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