Spectral decoupling regulation through targeted ion migration in electro-optical resonators

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Spectral decoupling is crucial for managing light and heat, enabling applications like photo-thermal regulation and multiband camouflage.
• Independent control over non-adjacent electromagnetic spectrum bands, particularly visible and longwave infrared (LWIR), remains a significant challenge.

Purpose of the Study:

• To develop a novel spectral decoupling regulator (SDR) capable of independently controlling visible color and LWIR emissivity.
• To demonstrate the feasibility of electrochemical reconstruction for dynamic spectral modulation.

Main Methods:

• Fabrication of a bilayer electro-optical resonator acting as the SDR.
• Electrochemical reconstruction via targeted ion migration within the dielectric and reflective layers.
• Characterization of switchable visible color presentation and LWIR emissivity modulation (Δε_LWIR of 0.57).

Main Results:

• The SDR achieved independent and switchable control over visible color and LWIR emissivity.
• Demonstrated a wide-range LWIR regulation with a significant emissivity change (Δε_LWIR = 0.57).
• Successfully realized the re-combination of visible color and LWIR emissivity on a single surface.

Conclusions:

• The developed SDR offers a promising solution for independent spectral decoupling across non-adjacent bands.
• The technology holds potential for multispectral applications, including dynamic optical skin and advanced encryption encoding.
• This work paves the way for smart materials with tunable optical and thermal properties.