A functionality switchable meta-device: from perfect reflection to perfect absorption

Aqib Raza Shah, Muhammad Ashar Naveed, Sumbel Ijaz, Arbab Abdur Rahim, Muhammad Zubair, Yehia Massoud, Muhammad Qasim Mehmood*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Tunable meta-devices trigger immense interest in many applications like biosensing, thermal camouflage, radiative cooling, thermal emitting, infrared imaging, and energy harvesting. This paper presents a polarization-independent broadband tunable absorbing and reflecting meta-device using a phase change material Germanium-Antimony-Tellurium (GST). The proposed design manifests high absorptivity >80% over a broadband range of wavelength spanning the mid-IR regime. Furthermore, by changing the phase of GST material from crystalline to amorphous with the help of external stimuli, the absorbance of the device was reduced to almost zero in the range from 4 μm to 12 μm. To previse the angular constancy of the meta-absorber, the absorptivity was scrutinized under different incidence angles in both transverse magnetic (TM) and transverse electric (TE) polarizations which manifested the robustness of the proposed meta-absorber. As a result, the proposed absorber has tunable broadband absorbance and angular stability, which proclaim great potential in applications such as thermal camouflage, radiation detection, thermal emitter, and stealth technology, etc.

Original languageEnglish (US)
Article number095514
JournalPhysica Scripta
Issue number9
StatePublished - Sep 1 2023

Bibliographical note

Funding Information:
Yehia Massoud acknowledges the research funding to the Innovative Technologies Laboratories (ITL) from King Abdullah University of Science and Technology (KAUST), Saudi Arabia.

Publisher Copyright:
© 2023 IOP Publishing Ltd


  • absorption
  • broadband
  • germanium-antimony-tellurium (GST)
  • meta-absorber
  • phase change materials (PCMs)
  • tunability

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics


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