Ultra-compact Efficient Mode Converter with Metamaterial Structures

Jingjing Zhang, Pengfei Qiu, Xiaodong Shi, Xuefeng Chen, Zijie Dai, Xiaoxian Song, Junbo Yang, Haiyan Ou, Kai Guo

Research output: Contribution to journalJournal articleResearchpeer-review


Mode converters play a key role in the mode division multiplexing, which is an emerging technology to enlarge the information transmission capacity. The footprint and the performance of the mode converters are essential for the compact and energy-efficient integrated photonics. We numerically and experimentally demonstrate an on-chip multimode-interferometer-based mode converter, between the one-order mode and the fundamental mode, using metamaterial structures for phase shift and crosstalk suppression, and significantly reduce the footprint. The fabricated device has a high conversion efficiency of 79% and a broad 3 dB bandwidth of >50 nm, with an ultra-small footprint of only μ.

Original languageEnglish
Article number104200
JournalInfrared Physics & Technology
Number of pages6
Publication statusAccepted/In press - 2022


  • Modeconverters
  • Metamaterial Structures
  • Telecommunication wavelength


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