Giant enhancement of second-harmonic generation of indium selenide on planar Au

Abstract

Two-dimensional (2D) van der Waals layered γ-type indium selenide (γ-InSe) holds great promise for the development of ultrathin and low-energy consumption nonlinear optical devices due to its broken inversion symmetry...

Giant optical absorption of a PtSe2-on-silicon waveguide in mid-infrared wavelengths

“…30–33 Among them, the vertically incident light moderately interacts with PtSe 2 due to the nanometer-scale thickness of the low-dimensional material, limiting the performance of the optoelectronic devices. Researchers have studied several methods to improve the light-PtSe 2 interaction, such as waveguide structures, 34,35 semiconductor-metal plasmonic structures, 36–38 and photonic cavity structures. 39,40 However, the study of the optical absorption of PtSe 2 -on-silicon waveguides in the SWMIR band has been seldom explored.…”