TITLE

Phonon modes of GaN[sub y]P[sub 1-y] (0.006≤y≤0.0285) measured by midinfrared spectroscopic ellipsometry

AUTHOR(S)
Leibiger, G.; Gottschalch, V.; Kasic, A.; Schubert, M.
PUB. DATE
November 2001
SOURCE
Applied Physics Letters;11/19/2001, Vol. 79 Issue 21, p3407
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Midinfrared spectroscopic ellipsometry reveals the two-phonon mode behavior of GaN[sub y]P[sub 1-y] for nitrogen compositions 0.006≤y≤0.0285. The single layers (∼350 nm) studied were grown by metalorganic vapor-phase epitaxy on GaP substrates with orientations (001), and (001) with 5° off toward [110]. Line-shape analysis of the midinfrared response allows determination of the transverse- and longitudinal-optical phonon frequencies of the GaP- and GaN-like phonon modes. The polar strength of the GaN lattice resonance increases linearly with y, which can be used to monitor the nitrogen content of GaN[sub y]P[sub 1-y]. © 2001 American Institute of Physics.
ACCESSION #
5549573

 

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