The role of lead component in second-harmonic generation in lead silica by electron-beam irradiation
Qiu, Mingxin (Kyushu Institute of Technology. Department of Electronics (Kyushu, Japó))
Pi, F. (Pi i Vila, Francesc) (Universitat Autònoma de Barcelona. Departament de Física)
Orriols Tubella, Gaspar (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society

Data:	1998
Resum:	It is found that the second-order nonlinearity induced in lead silica by electron-beam irradiation increases linearly with the lead percentage of the glass and a value of 4 pm/V has been estimated for ZF7 lead silica. The electrostatic field created under the glass surface increases with the lead percentage, which can be explained by the theory of stopping collisions of fast electrons. The layer depth is found proportional to the inverse square root of the lead percentage. The accumulative effect of electron irradiation for inducing the nonlinearity appears limited by the breakdown threshold in the charged layer. An optimum total electron charge per unit of scanned area of 0. 29 C/m2 has been determined for SF2 glass. Nonlinearity layer depths of 1. 9-4. 1 μm have been estimated by chemical etching for different lead silica and electron voltages, and the coefficients of the Bohr-Bethe penetration formula have been determined for SF2 glass.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Silica ; Electron surface collisions ; Collision theories ; Electron radiation effects ; Electrostatics ; Etching ; Surface collisions
Publicat a:	Applied physics letters, Vol. 73, Issue 21 (November 1998) , p. 3040-3042, ISSN 1077-3118

DOI: 10.1063/1.122665

4 p, 388.1 KB

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