Automatic Defect Analysis and Qualification (ADAQ) is a collection of automatic workflows developed for high-throughput simulations of magneto-optical properties of point defects in semiconductors. These workflows handle the vast number of defects by automating the processes to relax the unit cell of the host material, construct supercells, create ...
テラヘルツ周波数帯の真空量子揺らぎと格子振動の超強結合状態の実現 --量子光を駆動力とする新規物性制御への挑戦--. 京都大学プレスリリース. 2021-07-30. / Ultrastrong coupling (USC) between phonons and vacuum photons can result in fascinating quantum phenomena, though it is difficult to achieve due to the small dipole moments of phonons in solids. Here, we investigate the vacuum Rabi splitting by coupling phonons in...
Published in Nature Communications
Nonlinearity enhancement in different materials is relevant for many scientific applications. Here the authors demonstrate pulse modulation in the UV regime due to polariton-based nonlinearity in an AlInGaN waveguide structure, including at room temperature.
Published in Optical and Quantum Electronics
In this work, theoretically/mathematically simulated (TMS) model is presented for the photoacoustic (PA) frequency response of a semiconductor in a minimum volume PA cell. By analyzing of the TMS model, the influences of thermal diffusivity and linear coefficient of thermal expansion on silicon sample PA frequency response were investigated and two...
Published in EPJ Photovoltaics
Numerical simulations of AZO/Zn1−xGexO/Cu2O solar cell are performed in order to model for the first time the impact of the germanium composition of the ZnGeO buffer layer on the photovoltaic conversion efficiency. The physical parameters of the model are chosen with special care to match literature experimental measurements or are interpolated usi...
Published in Nature Communications
Previous research showed the existence of Rydberg excitons with large principle quantum numbers in Cu2O. Here, by using two-color pump-probe optical spectroscopy, the authors demonstrate the generation and control of long-range correlations between these giant Rydberg excitons, leading to exciton blockade.
Published in Nature Communications
Combining magnetic and semiconducting properties in a single material offers great technological potential, all the more so if these are coupled with good optical properties. Here, Neumann et al. present a Manganese doped Ruddlesden-Popper perovskite with this trifecta of attributes.
Published in Applied Physics A
Zinc oxide nanorods have been prepared, to our knowledge, for the first time using the green chemistry route. The used growth solution was a mixture of Artemisia flowers extract zinc precursor salt. Nanorods have been grown on glass substrate preliminary coated with ZnO thin film prepared by sputtering, used as a seed layer. The synthesized nanostr...
Published in Applied Physics A
A novel methodology and its mechanism to synthesize ZnO/ZnS core–shell nanostructure by hydrothermal-supported co-precipitation method are presented. Chemical precursors Na2S and thioacetic acid were used as chemical conversion agents. Detailed structural, morphological, compositional and optical studies were carried out. Powder X-ray diffraction a...
Published in Nature Communications
The coexistence of spin–orbit and electron–electron interactions is expected to give rise to novel electronic phases and spin textures, but it is challenging to achieve in experiments. Here the authors realize such a regime in a two-dimensional electron system at a MgZnO/ZnO interface, by tuning the carrier density.
