Junkang Wang

TL;DR: In this article, the surface character of these two modes is experimentally confirmed by their high sensitivity to the dielectric constant of the as-grown nanowires surrounding medium and suggest that these two peaks result from the anticrossing of axial and planar surface-related phonons.

TL;DR: In this paper, the authors report on the design and demonstration of a simple, practical multifrequency matchbox (MFMB) based on a network of LC resonant circuits, and quantified in terms of a range of matchable impedances (when matching a single frequency at a time), as well as for the independence of each match to changes at adjacent harmonics.

TL;DR: In this paper, the authors used tailored voltage waveforms to excite a plasma to decouple maximum ion energy from the ion flux on the electrode, and found that at critical energies (30 and 70 eV), a stepwise increase in the a-Si:H/μc-Si-H transition thickness is observed, together with change in the surface morphology.

TL;DR: In this article, the µRaman shift of the GaN E2 mode shows the U-shape inplane stress distribution across the mesa, where the center of the mesh is under tensile stress and it relaxes near the corner and edges.

TL;DR: In this paper, electrical-optical modeling of the measured PL signal from these wafers (in a solar cell configuration) is used to quantify the surface defects in each case, relative to e.g., the sample showing the highest PL signal, and link them to the solar cell output parameters and the defect density on the wafer surface.