Thin-Film Magnetless Faraday Rotators for Compact Heterogeneous Integrated Optical Isolators (Postprint)
Abstract
This report describes the fabrication, characterization, and transfer of ultra-compact thin-film magnetless Faraday rotators to silicon photonic substrates. Thin films of magnetization latching bismuth-substituted rare-earth iron garnets were produced from commercially available materials by mechanical lapping, dice polishing, and crystal-ion-slicing. Eleven-mu-thick films were shown to retain the 45Faraday rotation of the bulk material to within 2at 1.55 mu wavelength without repoling. Anti-reflection coated films evince 0:09 dB insertion loses and better than -20 dB extinction ratios. Lower extinction ratios than the bulk are ascribed to multimode propagation. Significantly larger extinction ratios are predicted for single-mode waveguides. Faraday rotation, extinction ratios, and insertion loss tests on He-ion implanted slab waveguides of the same material yielded similar results. The work culminated with bond alignment and transfer of 7 mu -thick crystal-ion-sliced 50 x 480 mu 2 films onto silicon photonic substrates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 27, 2017
- Accession Number
- AD1040405
Entities
People
- Andrea Pollick
- Dolendra Karki
- M. Levy
- Vincent Stenger
Organizations
- Michigan Technological University