Since the discovery of graphene, 2D materials with various properties have gained
increasing attention in fields such as novel electronic, optic, spintronic, and valleytronic …

Second harmonic generation (SHG) of two-dimensional (2D) layered materials has attracted
immense research interests due to the abilities of photon generation, manipulation …

Two-dimensional (2D) layered materials such as GaSe recently have emerged as novel
nonlinear optical materials with exceptional properties. Although exhibiting large nonlinear …

Gallium selenide (GaSe) is a layered compound, which has been exploited in nonlinear
optical applications and photodetectors due to its anisotropic structure and pseudodirect …

Two-dimensional material indium selenide (InSe) has offered a new platform for
fundamental research in virtue of its emerging fascinating properties. Unlike 2H-phase …

The centrosymmetric nature of silica fibre precludes the realisation of second-order
nonlinear processes in optical fibre systems. Recently, the integration of 2D materials with …

The intrinsic anisotropy of NbSe2 provides a favorable prerequisite of second harmonic
generation (SHG) and rich possibilities for tailoring its nonlinear optical (NLO) properties …

We demonstrate the first achievement of continuous-wave (CW) pumped second harmonic
generation (SHG) in few-and mono-layer gallium selenide (GaSe) flakes, which are coated …

Silicon-based nonlinear metasurfaces were implemented only with third-order nonlinearity
due to the crystal centrosymmetry and the efficiencies are considerably low, which hinders …

Thin ferroelectric materials hold great promise for compact nonvolatile memory and
nonlinear optical and optoelectronic devices. Herein, an ultrathin in‐plane ferroelectric …