التفاصيل البيبلوغرافية
| العنوان: |
Symmetry driven control of optical properties in WO3 films. |
| المؤلفون: |
Herklotz, A., Rus, S. F., KC, S., Cooper, V. R., Huon, A., Guo, E.-J., Ward, T. Z. |
| المصدر: |
APL Materials; 2017, Vol. 5 Issue 6, p1-7, 7p |
| مصطلحات موضوعية: |
TUNGSTEN trioxide, ELLIPSOMETRY, HELIUM |
| مستخلص: |
In this work, we demonstrate that the optical bandgap of WO3 films can be continuously controlled through uniaxial strain induced by low-energy helium implantation. The insertion of He into epitaxially grown and coherently strained WO3 films can be used to induce single axis out-of-plane lattice expansion of up to 2%. Ellipsometric spectroscopy reveals that the optical bandgap is reduced by about 0.18 eV per percent expansion of the out-of-plane unit cell length. Density functional theory calculations show that this response is a direct result of changes in orbital degeneracy driven by changes in the octahedral rotations and tilts. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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