| Autor: |
Němec, H., Duvillaret, L., Garet, F., Kužel, P., Xavier, P., Richard, J., Rauly, D. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 10/15/2004, Vol. 96 Issue 8, p4072-4075, 4p, 4 Graphs |
| Abstrakt: |
A high-quality smart filter for terahertz range with relative tunability reaching 20% has been demonstrated. The filter is based on a narrow transmission band, which originates from a defect mode that appears due to insertion of a single crystal of KTaO3 into otherwise periodic one-dimensional photonic crystal. Frequencies of defect modes are controlled by the refractive index of the defect: their high tunability is achieved by the strong temperature dependence of the dielectric properties of KTaO3. The low losses of KTaO3 lead to a high peak transmission of the filter. Influence of the defect losses on the properties of the filter is also discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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