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Low Noise and Drift Reconfigurable Solution-Processed Chalcogenide Phase Change Metasurfaces.

Mahirah Zaini¹, Abbas Sheikh Ansari¹, Joshua Perkins¹

¹Nanoscale Optics Lab, Electrical and Computer Engineering Dept, University of Alberta, Edmonton, AB T6G 2R3, Canada.

|July 25, 2025

Summary

This summary is machine-generated.

A new cost-effective method synthesizes chalcogenide phase change materials (PCMs) using solution processing. These materials enable high-performance reconfigurable optoelectronic devices and metasurfaces, lowering production costs.

Keywords:

metamaterials phase change reconfigurable solution‐processed spin coat thermo‐optic

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Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Chalcogenide glasses are key for reconfigurable optoelectronic devices due to their phase transition properties.
Current fabrication methods, like physical vapor deposition (PVD), are expensive and complex.
There is a need for cost-effective, scalable synthesis of chalcogenide phase change materials (PCMs).

Purpose of the Study:

To develop a cost-effective, solution-processed method for synthesizing chalcogenide PCMs.
To demonstrate the performance of solution-processed antimony sulfide (Sb2S3) films.
To introduce the first reconfigurable phase change chalcogenide metasurface fabricated from solution-processed films.

Main Methods:

Solution-processed synthesis of chalcogenide phase change materials (PCMs).
Deposition of optical-grade antimony sulfide (Sb2S3) films onto various substrates.
Fabrication and characterization of reconfigurable phase change chalcogenide metasurfaces.

Main Results:

Achieved subwavelength-thickness Sb2S3 films with non-volatile phase change modulation comparable to PVD methods.
Demonstrated significantly lower volatile thermo-optic response, reducing noise and drift.
Successfully patterned solution-processed PCM films into polarization-sensitive nanograting metasurfaces with period-dependent resonances and large modulation contrasts.

Conclusions:

Solution-processed chalcogenide PCMs offer a cost-effective alternative to PVD methods for optoelectronic applications.
These materials enable high-performance reconfigurable metasurfaces suitable for displays and advanced photonic platforms.
The liquid deposition technique facilitates integration with emitters and nanoparticles for novel hybrid composites.