UV light induced surface expansion phenomenon of hybrid glass thin films

Juha Rantala, Ari Kärkkäinen, Jussi Hiltunen, M. Keränen, Terho Kololuoma, Michael Descour

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

Liquid-phase deposition of sol-gel method derived hybrid glass materials is utilized for fabrication of UV-light-sensitive thin films. The hybrid glass material undergoes a surface-relief deformation when exposed to UV light. The observed deformation phenomenon is in the form of a physical expansion of the exposed areas. The UV light induced surface expansion of the hybrid glass film was used to fabricate near-sinusoidal diffraction gratings with periods of 24 microm, 18 microm, 12 microm, and 9 microm. The maximum deformation when the material was patterned as a diffraction grating was 0.685 microm. The hybrid glass material features an index of refraction of 1.52 at 632.8 microm, rms surface roughness of 2.2 +/- 0.8 microm after processing, and extinction coefficients of 1.2 x 10-3 microm-1 and 0.47 x 10-3 mm-1 at wavelengths of 633 nm and 1550 nm, respectively.
Original languageEnglish
Pages (from-to)682-687
Number of pages6
JournalOptics Express
Volume8
Issue number13
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

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expansion
glass
thin films
gratings (spectra)
refraction
surface roughness
liquid phases
extinction
gels
fabrication
coefficients
wavelengths

Cite this

Rantala, Juha ; Kärkkäinen, Ari ; Hiltunen, Jussi ; Keränen, M. ; Kololuoma, Terho ; Descour, Michael. / UV light induced surface expansion phenomenon of hybrid glass thin films. In: Optics Express. 2001 ; Vol. 8, No. 13. pp. 682-687.
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UV light induced surface expansion phenomenon of hybrid glass thin films. / Rantala, Juha; Kärkkäinen, Ari; Hiltunen, Jussi; Keränen, M.; Kololuoma, Terho; Descour, Michael.

In: Optics Express, Vol. 8, No. 13, 2001, p. 682-687.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - UV light induced surface expansion phenomenon of hybrid glass thin films

AU - Rantala, Juha

AU - Kärkkäinen, Ari

AU - Hiltunen, Jussi

AU - Keränen, M.

AU - Kololuoma, Terho

AU - Descour, Michael

PY - 2001

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AB - Liquid-phase deposition of sol-gel method derived hybrid glass materials is utilized for fabrication of UV-light-sensitive thin films. The hybrid glass material undergoes a surface-relief deformation when exposed to UV light. The observed deformation phenomenon is in the form of a physical expansion of the exposed areas. The UV light induced surface expansion of the hybrid glass film was used to fabricate near-sinusoidal diffraction gratings with periods of 24 microm, 18 microm, 12 microm, and 9 microm. The maximum deformation when the material was patterned as a diffraction grating was 0.685 microm. The hybrid glass material features an index of refraction of 1.52 at 632.8 microm, rms surface roughness of 2.2 +/- 0.8 microm after processing, and extinction coefficients of 1.2 x 10-3 microm-1 and 0.47 x 10-3 mm-1 at wavelengths of 633 nm and 1550 nm, respectively.

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