Ya-Pei Peng

  • Citations Per Year
Learn More
Optical microscopy and multi-particle tracking are used to study hydrodynamic interactions of monodisperse polymethylmethacrylate (PMMA) spheres at a decalin– water interface. The short-time self-diffusion coefficient measured at low surface coverage has the form D S (n)=αD0(1−βn), where n is the area fraction occupied by the particles, and D0 is the(More)
2.0 μm emission property of a new germanate-tellurite (GT) glass with Ho³⁺/Yb³⁺ codoping is synthesized and analyzed. Efficient 2.0 μm emission of Ho³⁺ ions sensitized by Yb³⁺ ions from the host glass was observed under 980 nm pumping. Based on the measured absorption spectra, the Judd-Ofelt parameters were calculated and discussed. The maximum emission(More)
A germanate-tellurite glass (GeO2-TeO₂-K₂O-Nb₂O₅-La₂O₃) with thulium doping has been investigated for application as a laser material around 2.0 μm regions. Under the 808 nm laser diode pumped, intense 1.8 μm emission is obtained. Based on the absorption spectra, radiative properties are predicted using Judd-Ofelt theory. The maximum value of emission(More)
A new type of germanate-tellurite glass with Tm<sup>3+</sup> ions doped was synthesized and its 1.8&#x03BC;m emission properties have been studied for its application as laser materials. The Judd-Ofelt intensity parameters, emission cross section, and absorption cross section of Tm<sup>3+</sup> ions were calculated and analyzed. Germanate-tellurite glass(More)
2.0&#x03BC;m spectroscopy of a new germanate-tellurite glass with Ho<sup>3+</sup>/Yb<sup>3+</sup> codoping is synthesized and analyzed. Efficient 2.0&#x03BC;m emission of Ho<sup>3+</sup> ions sensitized by Yb<sup>3+</sup> ions from the host glass is observed under 980nm pumping. The maximum emission cross section of Ho<sup>3+</sup> ions transition is(More)
A germanate-tellurite glass (GeO<sub>2</sub>-TeO<sub>2</sub>-K<sub>2</sub>O-Nb<sub>2</sub>O<sub>5</sub> -La<sub>2</sub>O<sub>3</sub>) with thulium doping has been investigated for application as a laser material at 2 &#x03BC;m region. Under the 808 nm laser diode pumped, intense 1.8 &#x03BC;m emission is obtained. The maximum value of emission cross-section(More)
In the present study, a tough tetragonal zirconia polycrystalline (Y-TZP) material was developed for use in high-speed infrared windows and domes. The influence of the preparation procedure and the microstructure on the material's optical properties was evaluated by SEM and FT-IR spectroscopy. It was revealed that a high transmittance up to 77% in the(More)