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Electric field indu...
Electric field induced structural modification and second order optical nonlinearity in potassium niobium silicate glass
- Article/chapterEnglish2009
Publisher, publication year, extent ...
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Elsevier BV,2009
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-19048
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-19048URI
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https://doi.org/10.1016/j.jnoncrysol.2009.09.005DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20100525
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Second harmonic generation properties have been studied in 23 K2O center dot 27Nb(2)O(5) center dot 50 SiO2 glass subjected to thermal poling. The poling-induced optical nonlinearity. with chi((2)) = 3.8 pm/V, has been related to structural modifications within a surface layer of a few microns on the anode side, as evidenced by means of confocal micro-Raman mapping along the sample thickness. The data indicate that the structural changes result from a charge transport process that causes network modifications in an alkali depleted layer whose thickness is comparable with that of the non-linear region. The Raman data also indicate that in the alkali depleted layer the network polymerization degree increases as a consequence of ion migration. The origin of the nonlinearity and the mechanisms activated by poling are discussed. The mechanism of non-bridging-oxygen to bridging-oxygen bond switching is proposed to explain ion migration and the subsequent structural changes in the glass.
Subject headings and genre
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Non-linear optics
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Raman spectroscopy
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Silicates
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Poling
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ionic-transport-properties
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2nd-harmonic generation
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borophosphate
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glasses
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atomic-structure
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blocking anode
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oxide glasses
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surface
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sodium
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irradiation
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depletion
Added entries (persons, corporate bodies, meetings, titles ...)
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Paleari, A.
(author)
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Ferraris, M.
(author)
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Fokine, MichaelKTH,Laserfysik(Swepub:kth)u1jem2t9
(author)
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Fanelli, E.
(author)
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Lorenzi, R.
(author)
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Spinolo, G.
(author)
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Aronne, A.
(author)
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KTHLaserfysik
(creator_code:org_t)
Related titles
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In:Journal of Non-Crystalline Solids: Elsevier BV355:52-54, s. 2578-25820022-30931873-4812
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