Self-organized lasers of reconfigurable colloidal assemblies

TL;DR

This paper demonstrates the self-organization of reconfigurable colloidal assemblies that function as dynamic random lasers, mimicking living systems' adaptive and responsive behaviors through reversible out-of-equilibrium self-assembly.

Contribution

It introduces a novel approach to creating active, adaptive laser systems using programmable colloidal self-assembly, bridging biological inspiration with photonic technology.

Findings

Random lasing depends on colloidal self-organization.

Lasers are tunable and responsive to external stimuli.

Assemblies can reconfigure and emulate living matter behaviors.

Abstract

Biological cells self-organize into living materials that uniquely blend structure with functionality and responsiveness to the environment. The integration of similar life-like features in man-made materials remains challenging, yet desirable to manufacture active, adaptive and autonomous systems. Here we show the self-organization of programmable random lasers from the reversible out-of-equilibrium self-assembly of colloids. Random lasing originates from the optical amplification of light undergoing multiple scattering within the dissipative colloidal assemblies and therefore is crucially dependent on their self-organization behavior. Under external light stimuli, these dynamic random lasers are responsive and present a continuously tunable laser threshold. They can thus reconfigure and cooperate by emulating the ever-evolving spatiotemporal relationship between structure and functionality typical of living matter.