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<p>Strain engineering, a key enabling strategy for extending Moore’s law, employs controlled mechanical modulation to achieve desired modifications in material attributes, such as electrical and optical properties. Thanks to the atomic-level thinness, the optical behaviors of two-dimensional (2D) materials can be remarkably modulated by strain engineering. In this perspective, we highlight two mechanical approaches—tensile strain and compressive strain—and their impact on 2D materials’ crystal structure and electronic structure. We also discuss fundamental limitations in strain transfer efficiency and interfacial control, proposing a roadmap for achieving deterministic mechanical-optical modulation and pushing the limit of strain engineering in 2D materials.</p>

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Mechanical modulation of optical properties in 2D materials

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Zejuan Zhang,
  • Shenghai Pei,
  • Luming Wang,
  • Lijuan Yang,
  • Ming Huang,
  • Juan Xia,
  • Zenghui Wang

摘要

Strain engineering, a key enabling strategy for extending Moore’s law, employs controlled mechanical modulation to achieve desired modifications in material attributes, such as electrical and optical properties. Thanks to the atomic-level thinness, the optical behaviors of two-dimensional (2D) materials can be remarkably modulated by strain engineering. In this perspective, we highlight two mechanical approaches—tensile strain and compressive strain—and their impact on 2D materials’ crystal structure and electronic structure. We also discuss fundamental limitations in strain transfer efficiency and interfacial control, proposing a roadmap for achieving deterministic mechanical-optical modulation and pushing the limit of strain engineering in 2D materials.