Fourier-transform infrared absorption measurements have been carried out in the two-phonon region of GaAs. Implantation of the nitrogen isotopes 14N and 15N, respectively, into bulk GaAs shows that a local vibrational mode at 471 cm-1 (14N) is due to isolated nitrogen. The band is also found in GaAs1-xNx(0≪x≪0.03) layers grown by solid-source molecular beam epitaxy. The strength of the band correlates quantitatively with the decrease of the lattice parameter determined by x-ray diffraction for x≪0.01 and can be used for the assessment of the nitrogen fraction incorporated substitutionally on anion lattice sites. © 2000 American Institute of Physics.
Published in:
Applied Physics Letters
(Volume:77
,
Issue:
21
)
Date of Publication:
Nov 2000
- Page(s):
-
3331
-
3333
- ISSN :
-
0003-6951
- Digital Object Identifier :
-
10.1063/1.1328096
- Product Type:
-
Journals & Magazines
- Date of Current Version :
-
18 June 2009
- Issue Date :
-
Nov 2000