Due to its unique physical, chemical, and mechanical properties, such as a low specific
density, large specific surface area, excellent thermal stability, oxidation resistance, low …

Light–matter interactions in two-dimensional (2D) materials have been the focus of research
since the discovery of graphene. The light–matter interaction length in 2D materials is …

Anti-Stokes photoluminescence (PL) is light emission at a higher photon energy than the
excitation, with applications in optical cooling, bioimaging, lasing, and quantum optics. Here …

Phonon-assisted photon upconversion (UPC) is an anti-Stokes process in which incident
photons achieve higher energy emission by absorbing phonons. This letter studies phonon …

Strain‐engineering in 2D transition metal dichalcogenide (TMD) semiconductors has
garnered intense research interest in tailoring the optical properties via strain‐induced …

The formation of p‐or n‐type material via impurity do** should be crucial and essentially
prior to the establishment of junction devices in semiconductor processing. Especially in a …

Excitons are quasi-particles composed of electron–hole pairs through Coulomb interaction.
Due to the atomic-thin thickness, they are tightly bound in monolayer transition metal …

Phonon-assisted upconverted emission is the heart of energy harvesting, bioimaging,
optical cryptography, and optical refrigeration. It has been demonstrated that emerging two …

Germanium monosulfide with an anisotropic puckered crystalline structure has recently
attracted much attention due to its unique optical and electronic properties; however, exciton …

In this work, we present a comprehensive theoretical and computational investigation of
exciton fine structures of WSe 2-monolayers, one of the best-known two-dimensional (2D) …