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Optics Letters

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  • Vol. 24, Iss. 19 — Oct. 1, 1999
  • pp: 1352–1354

High photosensitivity and nanometer-scale phase separation in GeO2-SiO2 glass thin films

Hideo Hosono and Junji Nishii  »View Author Affiliations


Optics Letters, Vol. 24, Issue 19, pp. 1352-1354 (1999)
http://dx.doi.org/10.1364/OL.24.001352


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Abstract

Amorphous xGeO<sub>2</sub>–(1-<i>x</i>)SiO<sub>2</sub> thin films exhibit large negative index changes (4–8%) in the high GeO<sub>2</sub> region (x>~0.25) on irradiation with ArF laser pulses. The sign of the index change is opposite the low GeO<sub>2</sub> region X<0.25, and the magnitude of the index change is larger by an order of magnitude than that reported so far. Cross-sectional transmission electron microscope observation has revealed that nanometer-scale phase separation is induced in these highly photosensitive glasses by irradiation with ArF excimer laser light pulses or electron beams. This is a first finding of microphase separation in SiO<sub>2</sub>–GeO<sub>2</sub> glasses by irradiation and provides an essential constraint on the modeling of photonic effects induced by irradiation in these glasses.

© 1999 Optical Society of America

OCIS Codes
(160.2750) Materials : Glass and other amorphous materials
(160.5320) Materials : Photorefractive materials
(310.3840) Thin films : Materials and process characterization
(350.3390) Other areas of optics : Laser materials processing

Citation
Hideo Hosono and Junji Nishii, "High photosensitivity and nanometer-scale phase separation in GeO2-SiO2 glass thin films," Opt. Lett. 24, 1352-1354 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-19-1352


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