Octagonal Quasicrystal Defect Mode Laser-Based PVK: Ir(ppy)₃ Polymer Driven by Optical Pumping

Area of Science:

• Materials Science
• Optoelectronics
• Photonics

Background:

• Organic lasers offer tunable and cost-effective alternatives to traditional solid-state lasers.
• Quasicrystal structures provide unique light-confining properties for enhanced optical devices.

Purpose of the Study:

• To demonstrate a green-emitting organic quasicrystal microcavity laser.
• To investigate the lasing performance and threshold characteristics of the developed organic laser.

Main Methods:

• Fabrication of a microcavity laser using a conjugated polymer complex (PVK: Ir(ppy)₃).
• Utilizing a sandwich structure with distributed Bragg reflector (DBR), organic gain membrane, and silver (Ag) output layer.
• Incorporating an octagonal quasicrystal for in-plane light localization and optical pumping for excitation.

Main Results:

• Successful demonstration of a single-mode organic laser emitting at 521 nm.
• Achieved a narrow spectral linewidth with a Full Width at Half Maximum (FWHM) of 0.8 nm.
• Reduced the lasing threshold to a low value of 0.181 μJ/cm².

Conclusions:

• The study successfully presents an optically pumped organic quasicrystal microcavity laser.
• The device exhibits efficient single-mode lasing with a low threshold, highlighting the potential of quasicrystals in organic photonics.
• This work contributes to the development of advanced organic laser technologies with improved performance.