"Triggering" effect of second harmonic generation in centrosymmetric alpha-BaB2O4 crystals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12640%2F09%3A00010062" target="_blank" >RIV/60076658:12640/09:00010062 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67179843:_____/09:00343179

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

"Triggering" effect of second harmonic generation in centrosymmetric alpha-BaB2O4 crystals

Popis výsledku v původním jazyce

We have discovered an occurrence of optical second harmonic generation at 1064 nm fundamental wavelength for the alpha-BaB2O4 (ABO) crystal illuminated by 7 ns nanosecond nitrogen laser of 337 nm. The effect is observed only during illumination and achieves the maximum SHG output after 15-20 min of treatment. After switching off of the UV laser treatment the SHG decreases during about 5 min. The maximum second order susceptibility achieved was equal to about 2.1 pm/V at 1064 min after about 20 min of UVlaser treatment. The observed SHG is explained by local photothermal heating of the crystals and photo stimulated photothermal anisotropy that favors an occurrence non-centrosymmetry of the local charge density. An additional investigations of the low-power (cw) He-Ne laser light indicate the absence of additional light scattering, which unambiguously indicates an absence of any additional microcrystalline states including non-cenrosymmetrical beta-BaB2O4 phases. Probably photostimulate

Název v anglickém jazyce

"Triggering" effect of second harmonic generation in centrosymmetric alpha-BaB2O4 crystals

Popis výsledku anglicky

We have discovered an occurrence of optical second harmonic generation at 1064 nm fundamental wavelength for the alpha-BaB2O4 (ABO) crystal illuminated by 7 ns nanosecond nitrogen laser of 337 nm. The effect is observed only during illumination and achieves the maximum SHG output after 15-20 min of treatment. After switching off of the UV laser treatment the SHG decreases during about 5 min. The maximum second order susceptibility achieved was equal to about 2.1 pm/V at 1064 min after about 20 min of UVlaser treatment. The observed SHG is explained by local photothermal heating of the crystals and photo stimulated photothermal anisotropy that favors an occurrence non-centrosymmetry of the local charge density. An additional investigations of the low-power (cw) He-Ne laser light indicate the absence of additional light scattering, which unambiguously indicates an absence of any additional microcrystalline states including non-cenrosymmetrical beta-BaB2O4 phases. Probably photostimulate

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Optical Materials

ISSN

0925-3467

e-ISSN

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Svazek periodika

31

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

3

Strana od-do

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Kód UT WoS článku

000263632400017

EID výsledku v databázi Scopus

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