Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry
The dielectric properties of alpha-MgH2 are investigated in the photon energy range between 1 and 6.5 eV. For this purpose, a sample configuration and experimental setup are developed that allow both optical transmission and ellipsometric measurements of a transparent thin film in equilibrium with h...
Saved in:
| Published in: | Physical review. B, Condensed matter and materials physics Vol. 68; no. 11 |
|---|---|
| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
2003
|
| Subjects: | |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The dielectric properties of alpha-MgH2 are investigated in the photon energy range between 1 and 6.5 eV. For this purpose, a sample configuration and experimental setup are developed that allow both optical transmission and ellipsometric measurements of a transparent thin film in equilibrium with hydrogen. We show that alpha-MgH2 is a transparent, color neutral insulator with a band gap of 5.6+/-0.1 eV. It has an intrinsic transparency of about 80% over the whole visible spectrum. The dielectric function found in this work confirms very recent band-structure calculations using the GW approximation by Alford and Chou (unpublished). As Pd is used as a cap layer we report also the optical properties of PdHx thin films. |
|---|---|
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/PhysRevB.68.115112 |