World Library  


 
  • Cover Image

Review of Scientific Instruments : Imaging piezospectroscopy

By: John B. Abbiss and Bauke Heeg

Description: A novel instrument is described for obtaining accurate high-resolution residual stress images of aluminum oxide materials, based on the piezospectroscopy of Cr3+ dopant ions. The instrument employs a charge coupled device camera, a narrow bandpass tunable filter and the use of Tikhonov regularization for reconstruction of the raw spectral data. The experimental accuracy and spectral shift resolution of this method were analyzed with two calibration light sou...

Read More
  • Cover Image

Physics of Plasmas : Effects of the parallel electron dynamics and...

By: D. Jovanovic, P. K. Shukla, and F. Pegoraro

Description: A new three-dimensional model for the warm-ion turbulence at the tokamak edge plasma and in the scrape-off layer is proposed, and used to study the dynamics of plasma blobs in the scrape-off layer. The model is based on the nonlinear interchange mode, coupled with the nonlinear resistive drift mode, in the presence of the magnetic curvature drive, the density inhomogeneity, the electron dynamics along the open magnetic field lines, and the electron-ion and e...

Read More
  • Cover Image

Journal of Applied Physics : Electric-field-controlled electron re...

By: Y. Y. Liao, D. S. Chuu, and S. R. Jian

Description: This study investigates phonon-induced electron relaxation in a lateral double quantum dot that is embedded in a suspended slab. Exact calculations are made in electric fields. The dependence of the relaxation rate on the parameters of the dots and the slabs is analyzed. Numerical results indicate that the relaxation rate depends strongly on the phonon character of the slab. Unlike in the bulk environment, phonon-subband quantization clearly influences the b...

Read More
  • Cover Image

Review of Scientific Instruments : Scalable time-correlated photon...

By: Michael Wahl, Hans-Jürgen Rahn, Tino Röhlicke, Gerald Kell, Daniel Nettels et al

Description: Time-correlated single photon counting continues to gain importance in a wide range of applications. Most prominently, it is used for time-resolved fluorescence measurements with sensitivity down to the single molecule level. While the primary goal of the method used to be the determination of fluorescence lifetimes upon optical excitation by short light pulses, recent modifications and refinements of instrumentation and methodology allow for the recovery of...

Read More
  • Cover Image

Applied Physics Letters : Low temperature diffusion length of exci...

By: Naoyuki Ino and Naoki Yamamoto

Description: Monochromatic cathodoluminescence (CL) images of threading dislocations in GaN epitaxial layers were observed using a transmission electron microscopy combined with CL system. The carrier diffusion lengths were derived from the free exciton emission intensity profile of the dislocation contrast in the CL images. The carrier diffusion lengths in Si-doped and Mg-doped GaN were nearly the same and shorter than that in undoped GaN in the temperature range from 2...

Read More
 
1
|
2
|
3
Records: 41 - 45 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.