Qingduo Duanmu

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
The optically pumped stimulated emission was observed from random growth ZnO nanorods. A thin metal layer was sputtered on Si wafer serving as a substrate. ZnO nanorods were grown on the thin metal layer using a hydrothermal method. Photoluminescence (PL) measurements were adopted to analyze the optical properties of the ZnO nanorods. A strong UV emission(More)
The current-voltage curve of an n-type silicon wafer was presented in aqueous HF. The critical current density J<sub>PS</sub> was discussed. The control technology of channel dimension was studied and realized by changing the etching current density according to the J<sub>PS</sub> and dark current density. The pore morphology influenced by the working(More)
Macropore silicon etching with photo-electro-chemistry was carried out under different experimental conditions, including etching voltage, current density and wave length of optical source et al. The surface, diameter of pore and wall of the macropore silicon were observed with Scanning Electronic Microscope (SEM) and Metallographic Microscope. The(More)
A diode-side-pumped fundamental mode Nd:YAG laser with unstable plane-concave resonator is theoretically simulated and experimentally demonstrated. The volume of fundamental mode is increased by this structure, and the fundamental mode spots at the rod changes slowly with thermal focus of the rod from threshold to whole pump. So the efficient mode match(More)
In the third-generation image tube, the input surface of microchannel plate (MCP) is typically coated with an ultra-thin dielectric film, called the ion barrier film (IBF), to prevent ions generated in MCP during operation from migrating back to the photocathode and damaging the activation layer of photocathode, and prolong the operation lifetime. But IBF(More)
  • 1