Binary-phase zone-plate arrays based on hybrid solgel glass

J. T. Rantala, P. Äyräs, R. Levy, S. Honkanen, M. R. Descour, N. Peyghambarian

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

An organically modified silane zirconate-based solgel material is used for the fabrication of binary-phase zone-plate arrays. The synthesized hybrid solgel material has a negative tone under UV exposure and can be patterned by a UV-lithography process. The transmittance of the material is nearly 100%, and the refractive index is 1.52. Two different diffractive lens arrays with focal lengths of 5 and 42 cm have been fabricated. The average roughness of the zone surface is less than 20 nm. The diffraction efficiencies of the lens arrays are measured as a function of modulation depth and exposure dose. A diffraction efficiency of 30% is achieved.

Original languageEnglish (US)
Pages (from-to)1939-1941
Number of pages3
JournalOptics letters
Volume23
Issue number24
DOIs
StatePublished - Dec 15 1998

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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