Ge2Sb2Te5-based, ultrathin, all-dielectric tunable mid-wavelength infrared perfect absorber

Roy Avrahamy, Amiel A. Ishaaya, Mark Auslender

Research output: Contribution to journalConference articlepeer-review

Abstract

GST-225 (Ge2Sb2Te5) phase change material was recently experimentally reported to exhibit measurable photoconductivity, a well-defined bandgap, and reconfigurable continuous partial crystallization. Sequentially, here we propose an ultrathin, all-dielectric, metamaterial-design based on an asymmetrical optical micro-/nanocavity, enclosing a 10 nm thick GST-225 photoactive layer, inversely optimized for perfect tunable absorption in the mid-wavelength infrared. The perfect absorption, solely in GST-225, can be spectrally[1]tuned actively (thermally/electrically/optically) by varying the crystallinity, and geometrically using the design parameters, which is highly application beneficial.

Original languageAmerican English
Pages (from-to)928-929
Number of pages2
JournalInternational Conference on Metamaterials, Photonic Crystals and Plasmonics
StatePublished - 1 Jan 2021
Event11th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2021 - Warsaw, Poland
Duration: 20 Jul 202123 Jul 2021

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Materials Science (miscellaneous)
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

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