ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A method for generating second-harmonic light from silica glass by doping its surface layer with ions is presented. When anions CO32−, OH− or Cl− are introduced from the cathodic surface during poling, the second-harmonic signal generated near that surface is enhanced by two orders of magnitude with respect to the case of poling without doping. The penetration depths of CO32−, OH− and Cl− have been measured by the etching technique. In contrast, by doping the anodic surface with cations Li+, Na+ or K+, the second-harmonic signal drops to one tenth of that corresponding to the case of poling without doping. This indicates that in the anodic surface the main charges are negative, and the positive charges neutralize them to decrease the strength of the electric field that is at the origin of the second-order susceptibility. Secondary ion mass spectroscopy detection shows the concentration distribution of the injected lithium in the surface layer. The second-harmonic signal from the anodic surface decreases monotonically with increasing poling-doping time up to 300 min. Doping from interfaces far from the electrodes is inefficient for influencing the second-harmonic generation. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1308068
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