Fine embossing of chalcogenide glasses - a new fabrication route for photonic integrated circuits

A. B. Seddon, W. J. Pan, D. Furniss, C. A. Miller, H. Rowe, D. Zhang, E. McBrearty, Y. Zhang, A. Loni, P. Sewell, T. M. Benson

Research output: Journal PublicationArticlepeer-review

51 Citations (Scopus)

Abstract

For the first time embossing of ribs, from 1 to 10 μm wide and ∼10 mm long, has been carried out in chalcogenide glass layers sputtered onto semiconductor wafer substrates, with potential to act as monomode waveguides; these features have been similarly embossed in the surface of bulk chalcogenide glasses. The embossing shows very good replication of the GaAs mould patterning to 1 μm definition, with evidence also for sub-micron replication. For the embossing, thin coatings of the chalcogenide glasses were sputtered onto wafer substrates as follows: (i) a 6 μm layer of Ge17As18Se65 (at.%) onto porous Si-on-Si wafer substrates and (ii) a 4 μm layer of Ge15As15Se17Te53 onto uncoated GaAs substrates. The Ge17As18Se65 sputtered glass layer on porous Si-on-Si was demonstrated to slab waveguide at 1.55 μm wavelength; it was designed to achieve monomode waveguiding at 1.55 μm after embossing, for the 5 μm wide rib. The series of ribs, 1-10 μm wide, were successfully embossed in the Ge17As18Se65 glass sputtered layer on porous Si-on-Si, but cracking of the glass layer occurred during the embossing process. Successful embossing of ribs without the glass layer cracking was achieved for the Ge15As15Se17Te53 sputtered glass layer on uncoated GaAs. Due to its relative simplicity, it is likely that hot embossing of this type of glass-based matrix offers an extremely promising route for producing high-resolution, guided-wave optical components and circuitry at low-cost, high-volume, and for a wide wavelength range.

Original languageEnglish
Pages (from-to)2515-2520
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume352
Issue number23-25
DOIs
Publication statusPublished - 15 Jul 2006
Externally publishedYes

Keywords

  • Chalcogenides
  • Optical microscopy
  • Optical properties
  • Planar waveguides
  • Processing
  • Scanning electron microscopy
  • Sputtering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Fine embossing of chalcogenide glasses - a new fabrication route for photonic integrated circuits'. Together they form a unique fingerprint.

Cite this