Large second-order nonlinearity induced in thermally poled Pyrex borosilicate glass

Honglin An; Simon Fleming

doi:10.1117/12.756984

11 February 2008 Large second-order nonlinearity induced in thermally poled Pyrex borosilicate glass

Honglin An, Simon Fleming

Proceedings Volume 6839, Nonlinear Optics: Technologies and Applications; 68390K (2008) https://doi.org/10.1117/12.756984
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Stable second-order nonlinearity (SON) was created in Pyrex borosilicate glass by the temperature/electric field thermal poling method. The distribution and amplitude of the induced nonlinearity were characterized with second harmonic microscopy. It was found that the SON was located in a narrow layer around 1.9 μm under the anode surface. An effective d₃₃ as high as 0.24 pm/V was obtained; a value comparable to that obtained in fused silica samples. The migration of different mobile alkali ions during the poling process was characterized with energy dispersive x-ray spectrometry in conjunction with scanning electron microscopy (SEM). It was found that Na was depleted from a region about 3.3 μm beneath the anode surface, while K was first depleted from the immediate region under the anode, and then accumulated in the Na-depleted region with its peak at ~1.8 μm beneath the anode. SEM observation of the cross-section of the poled glass region, after it had been etched in diluted hydrofluoric acid for several minutes, revealed an etched trench, ~1.8 μm under the anode edge and ~0.3 μm in width; while in post-annealed samples, no such etched trench could be observed. A frozen-in space-charge field due to charge migration is believed to be responsible for the creation of the SON and the altered etching rate in the poled region.

Citation Download Citation

Honglin An and Simon Fleming "Large second-order nonlinearity induced in thermally poled Pyrex borosilicate glass", Proc. SPIE 6839, Nonlinear Optics: Technologies and Applications, 68390K (11 February 2008); https://doi.org/10.1117/12.756984

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