Abstract 2D materials are promising for strain engineering due to their atomic thickness and
exceptional mechanical properties. In particular, non‐uniform and localized strain can be …

Structural chirality, defined as the lack of mirror symmetry in materials' atomic structure, is
only meaningful in three-dimensional space. Yet two-dimensional (2D) materials, despite …

The nonlinear optical (NLO) properties of two-dimensional (2D) materials are fascinating for
fundamental physics and optoelectronic device development. However, relatively few …

Nonlinear optics is of crucial importance in several fields of science and technology with
applications in frequency conversion, entangled‐photon generation, self‐referencing of …

Electric-dipole optical second harmonic generation (SHG) is a second-order nonlinear
process that is widely used as a sensitive probe to detect broken inversion symmetry and …

Twisted stacking of van der Waals materials with moiré superlattices offers a new way to
tailor their physical properties via engineering of the crystal symmetry. Unlike well-studied …

Second harmonic generation (SHG) as an essential nonlinear optical effect, has gradually
shifted its research trend toward the integration and miniaturization of photonic and …

Tubular structures of transition metal dichalcogenides (TMDCs) have attracted attention in
recent years due to their emergent physical properties, such as the giant bulk photovoltaic …

Dimensionality of materials is closely related to their physical properties. For two-
dimensional (2D) semiconductors such as monolayer molybdenum disulfide (MoS2) …

Nowadays, realizing miniaturized nonlinear optical (NLO) device is crucial to meet the
growing needs in on-chip nanophotonics as well as compact integrated devices. The strong …