Ultraviolet laser induced domain inversion on chromium coated lithium niobate crystals

Boes, A, Yudistira, D, Crasto, T, Steigerwald, H, Sivan, V, Limboeck, T, Friend, J, Mailis, S, Soergel, E and Mitchell, A 2014, 'Ultraviolet laser induced domain inversion on chromium coated lithium niobate crystals', Optical Materials Express, vol. 4, no. 2, pp. 241-254.


Document type: Journal Article
Collection: Journal Articles

Title Ultraviolet laser induced domain inversion on chromium coated lithium niobate crystals
Author(s) Boes, A
Yudistira, D
Crasto, T
Steigerwald, H
Sivan, V
Limboeck, T
Friend, J
Mailis, S
Soergel, E
Mitchell, A
Year 2014
Journal name Optical Materials Express
Volume number 4
Issue number 2
Start page 241
End page 254
Total pages 14
Publisher Optical Society of America
Abstract Direct UV laser writing on chromium coated lithium niobate (LiNbO3) crystals is found to produce spontaneous domain inversion associated with the exposed UV laser tracks. Experimental evidence suggests that this effect is attributed to local out-diffusion of oxygen, reducing the LiNbO3 crystal surface due to the presence of chromium. The thin chromium film becomes hot and reactive after absorbing the UV laser radiation thus acting as an oxygen getter. This very efficient process enables the inversion of domains at lower intensities as compared to other direct laser based poling methods practically eliminating the deleterious surface damage induced by the direct absorption of the UV laser radiation by the crystal. Furthermore, the versatility of this domain fabrication method, is demonstrated by the production of inverted domain structures on Z-, Y- and 128°YX-cut substrates.
Subject Nonlinear Optics and Spectroscopy
Photonics, Optoelectronics and Optical Communications
Keyword(s) Direct absorption
Domain structure
Efficient process
Experimental evidence
Fabrication method
Lithium niobate crystal
Thin chromium films
UV laser radiation
Copyright notice © 2014 Optical Society of America
ISSN 2159-3930
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