Full-color plasmonic random lasers for wearable applications.

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Wearable sensors are crucial for health monitoring, demanding devices with advanced optical and mechanical properties.
• Developing cost-effective and customizable light-emitting components for wearable applications remains a challenge.

Purpose of the Study:

• To create a simple, cost-effective method for producing full-color random lasers for wearable sensors.
• To investigate the potential of plasmonic effects in enhancing laser performance for flexible devices.

Main Methods:

• Utilized a spin-coating technique to fabricate flexible thin-film polymer random lasers.
• Integrated gain media (RhB, uranine, S420) and silver nanowires (Ag NWs) into a polyethylene glycol matrix.
• Investigated full-color emission by manipulating the gain film composition and evaluated device flexibility and biocompatibility.

Main Results:

• Achieved low threshold, narrow linewidth, and stable emission from plasmonic random lasers under optical excitation.
• Successfully generated monochromatic, dichromatic, and full-color emissions with a broad color gamut (superior to sRGB).
• Demonstrated high stability and resistance to interference, even with skin cream contact, confirming device robustness.

Conclusions:

• A simple and flexible preparation strategy for wearable full-spectrum light-emitting lasers has been proposed.
• Plasmonic-enhanced polymer random lasers offer a promising platform for customized, high-performance wearable sensors.
• The developed technology enables the creation of advanced wearable devices with tunable and stable full-color emission.