Two-dimensional Wrinkle Resonators for Random Lasing in Organic Glasses

Area of Science:

• Photonics and optical engineering
• Materials science for optoelectronic devices

Background:

• Random lasers offer unique light emission properties.
• Disordered structures can act as effective scattering resonators.
• Slab waveguides provide a platform for integrated photonic devices.

Purpose of the Study:

• To design and fabricate random lasers using disordered wrinkling patterns in slab waveguides.
• To investigate the lasing properties of a spirobifluorene-based active material within these structures.
• To demonstrate the tunability and performance of random lasers fabricated with this approach.

Main Methods:

• Fabrication of slab waveguides with 2D disordered wrinkling patterns via thermal annealing.
• Integration of 2,2',7,7'-tetraphenyl-9,9'-spirobifluorene as the active laser medium.
• Photopumping experiments to characterize optical emission and lasing behavior.

Main Results:

• Successful creation of random lasers utilizing wrinkled slab waveguides.
• Observation of a transition from amplified spontaneous emission to multiple-peak laser spectra.
• Achieved narrow laser linewidths as low as 0.1 nm.

Conclusions:

• The developed wrinkled slab waveguide structure is effective for random laser design.
• Tailorable wrinkling periodicity allows for control over laser characteristics.
• This approach demonstrates a viable method for fabricating efficient random lasers.