Zobrazeno 1 - 10
of 18
pro vyhledávání: '"R. H. Bartram"'
Publikováno v:
Applied Physics Letters. 67:1841-1843
The ESR observations of three distinct paramagnetic centers in TeO2 glasses are reported. One center is intrinsic to the glass and the other two are induced by KrF‐excimer‐laser radiation. The intrinsic center with a broad ESR spectrum is tentati
Publikováno v:
MRS Proceedings. 373
This is the first report of ESR observations of three distinct paramagnetic centers in TeO29 glasses. One center is intrinsic to the glass and the other two are induced by KrFexcimer-laser radiation. The intrinsic center with a broad ESR spectrum is
Publikováno v:
Journal of Physics: Conference Series. 249:012006
The energy-dependent pseudopotentials for electron-excess color centers in ionic crystals adopted by Bartram, Stoneham and Gash (BSG) were determined by a smoothness criterion because the trial wave functions employed are slowly varying on the scale
Publikováno v:
Journal of Applied Physics. 60:4253-4258
A systematic photoluminescence (PL) study of a deep level in liquid‐phase‐epitaxy‐grown GaAs:Sn is presented. Experimental details and results are reported on PL spectra and decay‐time measurements in the temperature range T=4.2–300 K for s
Publikováno v:
Le Journal de Physique Colloques. 41:C6-465
Autor:
R H Bartram, A M Stoneham
Publikováno v:
Journal of Physics C: Solid State Physics. 18:L549-L553
Alternative forms for the radiationless transition rate in the adiabatic coupling scheme are derived, with a minimum of special assumptions, for the case of coupling to several distinct promoting and accepting coordinates. Their relation to the stati
Publikováno v:
Journal of Applied Physics. 60:4248-4252
A theoretical model is presented for the physical description of free‐to‐bound transitions to deep levels in semiconductors and for the synthesis of their fluorescence line shapes. The analysis takes account of broadening by emission and absorpti
Publikováno v:
Journal of Physics C: Solid State Physics. 9:73-80
The nature of the ground state of the V centre in ionic oxides is discussed, where two holes are trapped by a cation vacancy. Experiment appears to indicate an S=1 ground state for BeO and Al2O3 and possibly ZnO, with S=0 in MgO and CaO. Simple theor
Publikováno v:
Journal of Applied Physics. 42:3827-3838
The optical absorption spectrum of ultraviolet‐ (uv‐) induced room‐temperature stable color centers and the uv spectrum for their generation in a laser self‐Q‐switching glass were obtained. The optical absorption spectrum is similar to that