ISSN:
1432-0630
Keywords:
71.70
;
42.55
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract The emission spectrum of Cr3+ in Y3Ga5O12 crystalline thin films at 10K is composed of the sharp R 1-line, its phonon sideband, and the very weak broadband. The lineshape of R 1-line at the peak wavelength of 689.8 nm cannot be fitted to a single Gaussian. This suggests that there exist several different Cr3+ sites in the thin film. This fact is confirmed by lifetime measurements; the radiative decay of the fluorescence is decomposed into multiple-exponential curves. The dominant component (2.8 ms) of the decay curve for the broadband emission is equal to those (2.4 ms) for R 1-line and its phonon sidebands. This result is discussed in terms of a tunneling model.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00324174
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