Phase Change Metasurfaces by Continuous or Quasi-Continuous Atoms for Active Optoelectronic Integration.

Area of Science:

• Nanophotonics and Metasurfaces
• Optoelectronics and Integrated Photonics

Background:

• Metasurfaces are advanced nanophotonic devices enabling versatile wave regulation with subwavelength thickness.
• Dynamic control of wave-matter interaction is crucial for integrated photonics and optoelectronics, but fixed performance limits current devices.
• Existing active photonic devices utilize MEMS, semiconductors, liquid crystals, or phase change materials (PCMs).

Purpose of the Study:

• To review recent progress in phase change metasurfaces for dynamic wave control (amplitude, phase, wavefront).
• To focus on metasurfaces with continuous or quasi-continuous atoms for enhanced optoelectronic integration.
• To highlight the potential of PCMs for CMOS-compatible active photonic devices.

Main Methods:

• Review of current literature on phase change metasurfaces.
• Analysis of dynamic wave control capabilities (amplitude and phase).
• Focus on PCMs integrated with metasurfaces for active photonic functionalities.

Main Results:

• Phase change metasurfaces demonstrate significant potential for dynamic wave control.
• PCMs offer a promising route for creating active metasurfaces compatible with CMOS fabrication.
• Continuous or quasi-continuous atomic structures are favored for seamless optoelectronic integration.

Conclusions:

• Phase change metasurfaces are a viable and promising candidate for active photonic devices.
• These devices enable dynamic control of light, essential for advanced integrated photonics and optoelectronics.
• Further development of PCMs in metasurfaces will accelerate progress in compact, reconfigurable optical systems.