| Autor: |
Tsunehiko Omori, Masafumi Tawada, Chihiro Suzuki, Chihiro Suzuki, Yasunori Takeuchi, Yasunori Takeuchi, Kazuaki Togawa, Kazuaki Togawa, Masakazu Yoshioka, Masakazu Yoshioka |
| Zdroj: |
Japanese Journal of Applied Physics; May 1997, Vol. 36 Issue: 5 p2863-2863, 1p |
| Abstrakt: |
We measured the quantum-efficiency (QE) dependence of the spin polarization of photoemission from a GaAs-AlGaAs superlattice over a wide range of QE values. In the QE range from 10-4to 10-9, a change in the polarization from 76% to 48% was observed at a wavelength of 778.5 nm. The maximum polarization at 778.5 nm was observed at a QE one tenth of the maximum value. We also observed a similar dependence at other wavelengths. Such a behavior suggests that the vacuum level and surface potential barrier play important roles concerning the spin polarization of photoemission. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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