Superkinetic Growth of Oval Organic Semiconductor Microcrystals for Chaotic Lasing

Synthesis of novel mesoscopic semiconductor architectures continually generates new photonic knowledge and applications. However, it remains a great challenge to synthesize semiconductor microcrystals with smoothly curved surfaces owing to the crystal growth anisotropy. Here, a superkinetic crystal growth method is developed to synthesize 2D oval organic semiconductor microcrystals. The solid source dispersion induces an exceptionally large molecular supersaturation for vapor deposition, which breaks the crystal growth anisotropy. The synthesized stadium-shaped organic semiconductor microcrystals naturally constitute fully chaotic optical microresonators. They support low-threshold lasing on high-quality-factor scar modes localized near the stadium boundary and directional laser emission assisted by the chaotic modes. These results will reshape the understanding of the crystal growth theory and provide valuable guidance for crystalline photonic materials design.

Automated summary

Novel mesoscopic semiconductor architectures are continuously synthesized using a superkinetic crystal growth method to produce 2D oval organic semiconductor microcrystals. These microcrystals break the crystal growth anisotropy and naturally form chaotic optical microresonators, supporting low-threshold lasing and directional laser emission assisted by chaotic modes. These results will reshape crystal growth theory understanding and guide the design of crystalline photonic materials.