Optical selection rules fundamentally determine the optical transitions between energy
states in a variety of physical systems, from hydrogen atoms to bulk crystals such as gallium …

We report a new dark exciton in monolayer MoS 2 using second harmonic generation
spectroscopy. Hereby, the spectrally dependent second harmonic generation intensity splits …

We report resonant second harmonic generation (SHG) spectroscopy of an hBN-
encapsulated monolayer of MoS $ _2 $. By tuning the energy of the excitation laser, we …

The total and binding energies of excitons in step-like asymmetric quantum wells made of
zincblende GaN/In xl Ga (1− xl) N/In xr Ga (1− xr) N/GaN are theoretically reported. It is …

The investigation on the formation of indirect exciton states in atomic layer doped structures
is presented. A GaAs-based system with n-type and p-type delta-doping layers is proposed …

Two-photon absorption (TPA) allows accessing “dark” states of matter that are otherwise
inaccessible to light, which serve as important building blocks for quantum information …

Optical selection rule fundamentally determines the optical transition between energy states
in a variety of physical systems from hydrogen atoms to bulk crystals such as GaAs. It is …

Crystal symmetry and its breaking are the core of modern condensed matter physics and
materials science research. They fundamentally determine the crystal topology, pairing …

Excitons in nanoscale semiconductor materials exhibit low-energy excitations in the range of
the exciton binding energy, analogous to inter-level excitations in atoms, yielding infrared …