Strain Imaging of Laterally-Stitched Monolayers by Nonlinear Optical Microscopy

POSTER

Abstract

Strain configuration is significant to crystal structure and performance of monolayer two-dimensional lattice. Heterojunction of various monolayer transition metal dichalcogenides (TMD) is emergent route to induce unique symmetry and strain configurations. Here, we realize the synthesis of diverse in-plane artificial lattice by lateral stitching of different monolayer TMD using sequential CVD growth. Highly oriented strain patterns are observed and studied by second harmonic generation imaging of the TMD multijunctions. Strain pattern with lateral and vertical heterostructures are studied using angle resolved second harmonic generation, which is practical to corelate unique properties by direct probing symmetry and strain cofiguration of monolayer TMDs.

*The authors acknowledge support from AOARD grant (co-funded with ONRG) FA2386-16-1-4009, Ministry of Science and Technology (MoST-106-2119-M-007-023-MY3; MoST-105-2112-M-007-032-MY3, 107-2923-M-007 -002 -MY3), and Academia Sinica Research Program on Nanoscience and Nanotechnology, Taiwan.

Presenters

  • Chun An Chen

    • National Taiwan Normal Univ

Authors

  • Chun An Chen

    • National Taiwan Normal Univ

  • Ying-Yu Lai

    • Materials Science and Engineering, National Tsing Hua University
    • National Taiwan Normal Univ

  • Kuan-Chang Chiu

    • National Taiwan Normal Univ

  • Chen Po-Han

    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • Yi-Hsien Lee

    • Materials Science and Engineering, National Tsing Hua University
    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • Yu-Ting Lin

    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • Yi-Cheng Chiang

    • Materials Science and Engineering, National Tsing Hua University
    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ

  • I-Tung Chen

    • National Tsing-Hua University
    • Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • National Taiwan Normal Univ