Sensitivity of second harmonic generation to space charge effects at Si(111)/electrolyte and Si(111)/SiO2/electrolyte interfaces
作者:
P. R. Fischer,
J. L. Daschbach,
D. E. Gragson,
G. L. Richmond,
期刊:
Journal of Vacuum Science&Technology A: Vacuum, Surfaces, and Films
(AIP Available online 1994)
卷期:
Volume 12,
issue 5
页码: 2617-2624
ISSN:0734-2101
年代: 1994
DOI:10.1116/1.579080
出版商: American Vacuum Society
关键词: SILICON;SILICON OXIDES;ELECTROCHEMISTRY;SPACE CHARGE;NONLINEAR OPTICS;AMMONIUM FLUORIDES;SULFURIC ACID;INTERFACES;HARMONIC GENERATION;Si;SiO2
数据来源: AIP
摘要:
The potential dependence in the surface second harmonic response from hydrogen terminatedn‐Si(111) and oxidizedn‐Si(111) surfaces has been examined in aqueous NH4F and H2SO4solutions. The relative phase of the nonlinear response as measured by rotational anisotropy experiments is found to be highly sensitive to the presence of the oxide and the field applied across the Si(111)/oxide/electrolyte interface. These observations are attributed to field effects within the space–charge region of the semiconductor which vary with the presence and thickness of the insulating oxide layer on the Si(111) surface.
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