光第二高調波発生(SHG)法によるGe/Ge-oxide界面の評価 [in Japanese] Optical Second Harmonic Observation of the Ge/Ge-Oxide Interface [in Japanese]
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The reflected optical second harmonic generation from the interface between Ge (111) and germanium oxide layers has been measured in dry nitrogen atmosphere as a function of the sample rotation angle around its surface normal. The germanium oxide layer was produced either by oxidizing the Ge (111) substrate in air at room temperature (natural oxidation) or by oxidizing the Ge (111) substrate in pure oxygen gas at 823 K (thermal oxidation). A difference was found in the SH intensity in <I>p</I>-in/<I>p</I>-out polarization configuration between the Ge/native-oxide interface and the Ge/ thermal-oxide interface. By XPS measurement, we found that GeO and GeO<SUB>2</SUB> were formed at the Ge (111) /nativeoxide interface and at the Ge (111) /thermal-oxide interface, respectively. We conclude that the difference in the interface structure has led to the difference in the SH intensity pattern.
- Journal of the Vacuum Society of Japan
Journal of the Vacuum Society of Japan 42(3), 301-304, 1999-03
The Vacuum Society of Japan