| Autor: |
Fletcher, Luke B., Witcher, Jon J., Reichman, Wilbur B., Arai, Alan, Bovatsek, Jim, Krol, Denise M. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Oct2009, Vol. 106 Issue 8, p083107-083112, 5p, 2 Black and White Photographs, 1 Diagram, 2 Charts, 3 Graphs |
| Abstrakt: |
Changes to the glass network structure after modification with tightly focused 1043 nm, 400 fs laser pulses have been studied in Er–Yb doped phosphate glass using in situ confocal Raman microscopy. For femtosecond laser writing conditions that result in heat accumulation, the 710 and 1209 cm-1 Raman peaks, which are due to the (POP)sym and (PO2)sym network vibration modes, respectively, shift to both higher and lower wavenumbers. The differences in refractive index are shown to correlate spatially with the 1209 cm-1 Raman signal shifts. Systematic shifts in this Raman peak to higher and lower wavenumbers indicate an overall expansion and/or contraction of the phosphate network that depends on the femtosecond laser writing conditions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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