Electric field induced structural modification and second order optical nonlinearity in potassium niobium silicate glass

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Fältnamn	Indikatorer	Metadata
000		02750naa a2200529 4500
001		oai:DiVA.org:kth-19048
003		SwePub
008		100805s2009 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190482 URI
024	7	a https://doi.org/10.1016/j.jnoncrysol.2009.09.0052 DOI
040		a (SwePub)kth
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Pernice, P.4 aut
245	1 0	a Electric field induced structural modification and second order optical nonlinearity in potassium niobium silicate glass
264	1	b Elsevier BV,c 2009
338		a print2 rdacarrier
500		a QC 20100525
520		a 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.
653		a Non-linear optics
653		a Raman spectroscopy
653		a Silicates
653		a Poling
653		a ionic-transport-properties
653		a 2nd-harmonic generation
653		a borophosphate
653		a glasses
653		a atomic-structure
653		a blocking anode
653		a oxide glasses
653		a surface
653		a sodium
653		a irradiation
653		a depletion
700	1	a Paleari, A.4 aut
700	1	a Ferraris, M.4 aut
700	1	a Fokine, Michaelu KTH,Laserfysik4 aut0 (Swepub:kth)u1jem2t9
700	1	a Fanelli, E.4 aut
700	1	a Lorenzi, R.4 aut
700	1	a Spinolo, G.4 aut
700	1	a Aronne, A.4 aut
710	2	a KTHb Laserfysik4 org
773	0	t Journal of Non-Crystalline Solidsd : Elsevier BVg 355:52-54, s. 2578-2582q 355:52-54<2578-2582x 0022-3093x 1873-4812
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-19048
856	4 8	u https://doi.org/10.1016/j.jnoncrysol.2009.09.005

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Av författaren/redakt...: Pernice, P.; Paleari, A.; Ferraris, M.; Fokine, Michael; Fanelli, E.; Lorenzi, R.; visa fler...; Spinolo, G.; Aronne, A.; visa färre...

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