Study of the effects of MeV Ag, Cu, Au, and Sn implantation on the optical properties of LiNbO{sub 3}
- Alabama A and M Univ., Normal, AL (United States)
- Oak Ridge National Lab., TN (United States)
- Univ. Claude Bernard, Lyon (France)
The authors present the results of characterization of linear absorption and nonlinear refractive index of Au, Ag, Cu and Sn 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 and Cu were implanted to fluences of 5 to 20 {times} 10{sup 16}/cm{sup 2} at an energy of 2.0 MeV. Sn was implanted to a fluence of 1.6 {times} 10{sup 17}/cm{sup 2} at 160 kV. Optical absorption spectrometry indicated an absorption peak for the Au implanted samples after heat treatment at 1,000 C at 620 nm. The Ag implanted samples absorption peaks shifted from 450 nm before heat treatment to 550 nm after 500 C for 1h. Heat treatment at 800 C returned the Ag implanted crystals to a clear state. Cu nanocluster absorption peaks disappears at 500 C. No Sn clusters were observed by optical absorption or XRD. The size of the Ag and Au clusters as a function of heat treatment were determined from the absorption peaks. The Ag clusters did not change appreciably in size with heat treatment. The Au clusters increased from 3 to 9 nm diameter upon heat treatment at 1000 deg C. TEM analysis performed on a Au implanted crystal indicated the formation of Au nanocrystals with facets normal to the c-axis. 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); National Aeronautics and Space Administration, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 654162
- Report Number(s):
- ORNL/CP--96639; CONF-971201--; ON: DE98005051
- Country of Publication:
- United States
- Language:
- English
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