Near-surface modification of the third-order nonlinear susceptibility in thermally poled Infrasil™ glasses

Abstract

Articles you may be interested inStabilization of the second-order susceptibility induced in a sulfide chalcogenide glass by thermal poling J. Appl. Phys. 101, 084905 (2007); 10.1063/1.2719008 Femtosecond investigation of the non-instantaneous third-order nonlinear suceptibility in liquids and glasses Appl. Phys. Lett. 87, 211916 (2005); 10.1063/1.2136413 Erratum: "Double fitting of Marker fringes to characterize near-surface and bulk second-order nonlinearities in poled silica" [Appl.

Ion migration study in acid‐leached soda–lime–silica glass by thermally stimulated depolarization current analysis

“…When the polarization voltage is removed after cooling, a residual internal electric field remains in the sample due to the migration of Na + ions 57,58 . This residual electric field and the Na concentration gradient contribute to the Na + ions transporting back from the cathode side to the anode side, resulting in the measured negative current (homocharge) during TSDC as shown in Figure 5a.…”

“…When the polarization voltage is removed after cooling, a residual internal electric field remains in the sample due to the migration of Na + ions. 57,58 This residual electric field and the Na concentration gradient contribute to the Na + ions transporting back from the cathode side to the anode side, resulting in the measured negative current (homocharge) during TSDC as shown in Figure 5a. The thermally activated relaxation processes from the TSDC spectra can be observed in the temperature window of 50-250 • C. A distinctive peak P1 is observed at a temperature maximum (T m ) of 138-147 • C for SLS and 5ALSLS, respectively.…”

Electrooptical fibers

“…The closer to the surface, the stronger is the nonlinearity recorded [5]. When poling optical fibers, the overlap between the nonlinear region and the core should be as complete as possible.…”

“…The justification for this assumption -which seems to work in general -is that a fiber with internal electrodes at room temperature behaves more as a charged capacitor than as a resistor. Another point worth mentioning is that it has been shown through numerical simulations of bulk samples that the field in the depletion region is far from being constant, at least for short poling times [5]. The single value for the field across the thickness of depletion region here must be treated as a first approximation.…”