Switching of emissivity and photoconductivity in highly doped Yb3+:Y2O3 and Lu2O3 ceramics
Abstract
Reversible jump of thermal emission accompanied with jump of photocurrent is observed in highly doped Yb3+:Y2O3 and Lu2O3 bulk ceramics pumped at 940nm wavelength. In contrast, when these materials are heated with a CO2 laser at 10.6μm wavelength, only a gradual increase of thermal emission and photoconductivity are observed up to the melting point. These results are interpreted as a ytterbium mediated, photoassisted avalanche of thermal emission.
- Publication:
-
Applied Physics Letters
- Pub Date:
- May 2007
- DOI:
- 10.1063/1.2739318
- Bibcode:
- 2007ApPhL..90t1901B
- Keywords:
-
- 78.20.Nv;
- 72.40.+w;
- 78.55.Hx;
- 78.20.Ci;
- Thermooptical and photothermal effects;
- Photoconduction and photovoltaic effects;
- Other solid inorganic materials;
- Optical constants