Study of the effects of MeV Ag and Au implantation on the optical properties of LiNbO{sub 3}
- Alabama A and M Univ., Normal, AL (United States). Howard J. Foster Center for Irradiation of Materials
- Oak Ridge National Lab., TN (United States). Solid State Div.
- Univ. Claude Bernard, Lyon (France)
The authors present the results of characterization of linear absorption and nonlinear refractive index of Au and Ag nanoclusters made by MeV ion implantation into LiNbO{sub 3}. Ag was implanted at 1.5 MeV to fluences of 2 to 17 {times} 10{sup 16}/cm{sup 2} at room temperature. Au was implanted to fluences of 5 to 20 {times} 10{sup 16}/c{sup 2}m at an energy of 2.0 MeV. Optical absorption spectrometry indicated an absorption peak at 560 nm for the Au implanted samples after a 30 minute heat treatment at 500 C in air. The peak shifted to {approximately} 620 nm after heat treatment at 1,000 C. The Ag implanted samples had absorption peaks at 445 to 485 nm before heat treatment. After 500 C heat treatment for 1 h the peaks decreased in height and shifted to 545--560 nm. Heat treatment at 800 C was sufficient to return the Ag implanted crystals to a clear state. The size of the clusters was determined from the absorption peaks. The Ag clusters did not change appreciably in size with heat treatment. The Au clusters increased from 1 to 3 nm upon heat treatment at 1,000 C. Measurements of the nonlinear refractive indices were carried out using the Z-scan method with a tunable dye laser pumped by a frequency doubled mode locked Nd:YAG laser. The dye laser had a 4.5 ps pulse duration time and 76 MHz pulse repetition rate (575 nm).
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 642768
- Report Number(s):
- ORNL/CP--94845; CONF-9709116--; ON: DE98000689
- Country of Publication:
- United States
- Language:
- English
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