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Self-organized lasers from reconfigurable colloidal assemblies

Trivedi, Manish; Saxena, Dhruv; Ng, Wai Kit; Sapienza, Riccardo; Volpe, Giorgio; (2022) Self-organized lasers from reconfigurable colloidal assemblies. Nature Physics , 18 pp. 939-944. 10.1038/s41567-022-01656-2. Green open access

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Abstract

Non-equilibrium assemblies, where units are able to harness available energy to perform tasks, can often self-organize into dynamic materials that uniquely blend structure with functionality and responsiveness to their environment. The integration of similar features in photonic materials remains challenging but is desirable to manufacture active, adaptive and autonomous photonic devices. Here we show the self-organization of programmable random lasers from the reversible out-of-equilibrium self-assembly of colloids. The random lasing originates from the optical amplification of light undergoing multiple scattering within the dissipative colloidal assemblies and therefore depends crucially on their self-organization behaviour. Under external light stimuli, these dynamic random lasers are responsive and present a continuously tuneable laser threshold. They can therefore reconfigure and cooperate by emulating the ever-evolving spatiotemporal relationship between structure and functionality that is typical of many non-equilibrium assemblies.

Type: Article
Title: Self-organized lasers from reconfigurable colloidal assemblies
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/s41567-022-01656-2
Publisher version: https://doi.org/10.1038/s41567-022-01656-2
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10152128
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