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3-micron wave band mid-infrared polarization-independent graphene modulator

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Abstract

A novel polarization-independent electro-absorption graphene modulator is proposed. Two layers of graphene structure are transferred on the inclined arsenic selenide and then covered with arsenic selenide to form a partially inclined graphene-arsenic selenide waveguide structure. According to the simulation results, TE and TM effective mode in the waveguide have almost the same change under different Graphene chemical potentials near the 3 μm wavelength. For the 100-μm-long waveguide structure, the extinction ratio (ER) of about 20 dB can be achieved through the selection of low absorption ("ON") and high absorption ("OFF") state points, and the gap between the two modes’ ER is less than 1.2 dB. The dependency of these two polarization states in "ON" state is lower than 0.112 dB, which indicates that the device can be used as polarization independent modulation. And combined with simulation calculations, the theoretical 3 dB modulation bandwidth (f3dB) of the proposed modulator reaches 43.5 GHz.

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Funding

This work was funded by Program for International S&T Cooperation Projects of Sichuan Province (20GJHZ0266), National Key Research and Development Project (2018YFE0201901), National Nature Science Foundation of China (No. 61435010, 61307070, 61421002, 61704021) and the Fundamental Research Funds for the Central Universities (ZYGX2019J046).

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Authors and Affiliations

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Rongguo Lu, Liming Shen, Yujiao Wang, Songwei Cai, Rui Lin, Jinzhan Chen, Jiangbo Lyu, Xiaoju Wang & Yong Liu

  2. Chongqing United Microelectronics Center, Chongqing, 401332, China

    Zhonghua Yang

Authors
  1. Rongguo Lu
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  2. Liming Shen
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  3. Yujiao Wang
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  4. Songwei Cai
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  5. Rui Lin
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  6. Jinzhan Chen
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  7. Zhonghua Yang
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  8. Jiangbo Lyu
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  9. Xiaoju Wang
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  10. Yong Liu
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Contributions

RL, XW, YL gave the idea and function realization form of the modulator. Liming Shen finished the simulation of this modulator and performance optimization, YW, SC, RL, JC, ZY, JL joined the building of this structure participated in the discussion of structure optimization.

Corresponding author

Correspondence to Rongguo Lu.

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Lu, R., Shen, L., Wang, Y. et al. 3-micron wave band mid-infrared polarization-independent graphene modulator. Eur. Phys. J. Plus 136, 862 (2021). https://doi.org/10.1140/epjp/s13360-021-01852-8

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  • DOI: https://doi.org/10.1140/epjp/s13360-021-01852-8

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