Interference peaks in double-crystal x-ray rocking curves of laser structures
- 29 December 1986
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 49 (26), 1773-1775
- https://doi.org/10.1063/1.97240
Abstract
Interference peaks in double-crystal x-ray rocking curves have been observed in GaAlAs laser structures. The interference has been shown to arise from phase coherence of the x-ray waves across a thin heteroepitaxial layer sandwiched between two layers of equal composition. It is shown that the interference fringes can be used to measure active layer thicknesses to ±200 Å. This is despite the fact that the active layer peak cannot be resolved in the rocking curve.Keywords
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