Development of diffraction binary grating using hot embossing processing with electroformed nickel mold for broadband IR optics

R. Kasztelanic, I. Kujawa, R. Stepien, A. J. Waddie, M. R. Taghizadeh, R. Buczynski

Research output: Contribution to journalArticle

Abstract

In this paper we report on cost-effective fabrication of glass diffractive optical elements dedicated to work over a spectral range from the visible to the mid-infrared. As a test we have developed of checker-board diffraction grating using the hot embossing process. The nickel (Ni) shim fabricated using low-cost electroforming method was used as a mold. We synthesised in-house a new composition of lead-free bismuth-silicate glass, labelled SAB-1A, with good rheological properties and high transmittance up to 3.5 μm. Glass composition and parameters of hot embossing process were optimised to accurately replicate the grating and separate the glass replica from the mold. The quality of the fabricated elements was discussed and examined using a white light interferometer and in experimental setup for generation of diffractive pattern at different wavelengths.

Original languageEnglish
Article number103293
JournalInfrared Physics and Technology
Volume107
Early online date1 Apr 2020
DOIs
Publication statusPublished - Jun 2020

Keywords

  • Cost-effective replication
  • Diffraction grating
  • Hot embossing
  • Micro-optics fabrication
  • Mid-infrared

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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