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Optical imaging of strain in two-dimensional crystals

Author

Listed:
  • Lukas Mennel

    (Vienna University of Technology)

  • Marco M. Furchi

    (Vienna University of Technology)

  • Stefan Wachter

    (Vienna University of Technology)

  • Matthias Paur

    (Vienna University of Technology)

  • Dmitry K. Polyushkin

    (Vienna University of Technology)

  • Thomas Mueller

    (Vienna University of Technology)

Abstract

Strain engineering is widely used in material science to tune the (opto-)electronic properties of materials and enhance the performance of devices. Two-dimensional atomic crystals are a versatile playground to study the influence of strain, as they can sustain very large deformations without breaking. Various optical techniques have been employed to probe strain in two-dimensional materials, including micro-Raman and photoluminescence spectroscopy. Here we demonstrate that optical second harmonic generation constitutes an even more powerful technique, as it allows extraction of the full strain tensor with a spatial resolution below the optical diffraction limit. Our method is based on the strain-induced modification of the nonlinear susceptibility tensor due to a photoelastic effect. Using a two-point bending technique, we determine the photoelastic tensor elements of molybdenum disulfide. Once identified, these parameters allow us to spatially image the two-dimensional strain field in an inhomogeneously strained sample.

Suggested Citation

  • Lukas Mennel & Marco M. Furchi & Stefan Wachter & Matthias Paur & Dmitry K. Polyushkin & Thomas Mueller, 2018. "Optical imaging of strain in two-dimensional crystals," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-02830-y
    DOI: 10.1038/s41467-018-02830-y
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    Cited by:

    1. Shivangi Shree & Delphine Lagarde & Laurent Lombez & Cedric Robert & Andrea Balocchi & Kenji Watanabe & Takashi Taniguchi & Xavier Marie & Iann C. Gerber & Mikhail M. Glazov & Leonid E. Golub & Bernha, 2021. "Interlayer exciton mediated second harmonic generation in bilayer MoS2," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    2. Zeya Li & Junwei Huang & Ling Zhou & Zian Xu & Feng Qin & Peng Chen & Xiaojun Sun & Gan Liu & Chengqi Sui & Caiyu Qiu & Yangfan Lu & Huiyang Gou & Xiaoxiang Xi & Toshiya Ideue & Peizhe Tang & Yoshihir, 2023. "An anisotropic van der Waals dielectric for symmetry engineering in functionalized heterointerfaces," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Xinyu Chen & Yufeng Xie & Yaochen Sheng & Hongwei Tang & Zeming Wang & Yu Wang & Yin Wang & Fuyou Liao & Jingyi Ma & Xiaojiao Guo & Ling Tong & Hanqi Liu & Hao Liu & Tianxiang Wu & Jiaxin Cao & Sitong, 2021. "Wafer-scale functional circuits based on two dimensional semiconductors with fabrication optimized by machine learning," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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