Effect of the oblique excitation and detection on the cathodoluminescence spectra

Sekiguchi, T., Chandra, M. R., Yao, Y. Z., Yuan, X. L., Tsuji, K. and Kang, J. Y. (2006). Effect of the oblique excitation and detection on the cathodoluminescence spectra. In: Professor Wang, Professor Yang and Dr. Qu, Materials Science in Semiconductor Processing. 11th International Conference on Defects - Recognition Imaging and Physics in Semiconductors (DRIP-XI), Beijing, China, (19-24). 13-19 Sep 2006.


Author Sekiguchi, T.
Chandra, M. R.
Yao, Y. Z.
Yuan, X. L.
Tsuji, K.
Kang, J. Y.
Title of paper Effect of the oblique excitation and detection on the cathodoluminescence spectra
Conference name 11th International Conference on Defects - Recognition Imaging and Physics in Semiconductors (DRIP-XI)
Conference location Beijing, China
Conference dates 13-19 Sep 2006
Proceedings title Materials Science in Semiconductor Processing   Check publisher's open access policy
Journal name Materials Science in Semiconductor Processing   Check publisher's open access policy
Place of Publication Oxford
Publisher Pergamon
Publication Year 2006
Sub-type Fully published paper
DOI 10.1016/j.mssp.2006.01.067
ISSN 1369-8001
Editor Professor Wang
Professor Yang
Dr. Qu
Volume 9
Issue 1-3
Start page 19
End page 24
Total pages 6
Language eng
Abstract/Summary We have elucidated the effect of oblique excitation and detection on cathodoluminescence (CL) spectra. A new CL system was developed, in which the light collector (detector) is set normal to the electron beam direction (excitation). The direction of excitation and detection was varied by tilting the specimen. CL spectra from free-standing GaN platelet were recorded with various tilt angles. The band edge emission has suffered serious suppression when the detector is set at the horizontal direction. We attributed it to the reabsorption of band edge emission. However, this suppression is not serious for the shallow level and deep level emissions because these lights have not suffered reabsorption effect. The gradual decrease at higher tilt angle may be explained with the geometrical effect of reducing the excitation volume due to oblique specimen surface. These findings suggest that the geometrical factor may give serious modification on the CL spectra when the specimen surface normal is tilted more than 60 degrees from the direction of detector. (c) 2006 Elsevier Ltd. All rights reserved.
Subjects 020402 Condensed Matter Imaging
Keyword Cathodoluminescence
Absorption
Oblique detection
GaN
Q-Index Code E1

 
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