Flexible all-polymer waveguide for low threshold amplified spontaneous emission.

Area of Science:

• Materials Science
• Polymer Science
• Optoelectronics

Background:

• Conjugated polymers (CPs) offer unique optoelectronic properties.
• Flexible and biodegradable polymers like cellulose acetate (CA) are attractive for device fabrication.
• Developing all-polymer optical waveguides is crucial for flexible photonic applications.

Purpose of the Study:

• To fabricate all-polymer optical waveguides using a fluorescent conjugated polymer (poly(9,9-dioctylfluorene-alt-benzothiadiazole) or F8BT) and cellulose acetate (CA).
• To evaluate the optical properties, including optical loss and amplified spontaneous emission (ASE) threshold, of the fabricated waveguides.
• To assess the mechanical flexibility and optical stability of the waveguides after bending.

Main Methods:

• Fabrication of waveguides using hot embossing of patterned CA substrates.
• Processing of high-quality F8BT films via spin coating onto CA substrates.
• Characterization of optical loss, ASE threshold, and optical properties after mechanical bending.

Main Results:

• Successfully fabricated entirely plastic, flexible optical waveguides.
• Achieved low optical loss and a low threshold for amplified spontaneous emission (ASE).
• Demonstrated excellent optical properties that remain unaltered after bending.

Conclusions:

• The developed all-polymer waveguides exhibit promising optical and mechanical properties for flexible photonic devices.
• The combination of F8BT and CA offers a viable route for creating high-performance, adaptable plastic optical components.
• These flexible waveguides can be integrated into various advanced optoelectronic systems.