Publication date: 15th December 2025
Photonic structures sustain optical resonances that amplify light–matter interactions, enabling more efficient light management and, consequently, improved performance in optoelectronic devices. Nevertheless, emerging optoelectronic technologies rely on cost-effective and large-scale manufacturing techniques that can reduce expenses and boost production efficiency. To harness the remarkable attributes of nanophotonic structures for enhancing these devices, they must also be produced with high throughput processes.
In our research group, we employ soft nanoimprinting lithography, a versatile, rapid, and cost-efficient method for creating nanostructures from a diverse variety of materials. In soft nanoimprinting lithography, we make use of pre-patterned soft elastomeric stamps to fabricate photonic structures out of materials such as resists, biopolymers, colloids and nanomaterials in general. In all cases, the resulting photonic architectures can exhibit a resolution below 100 nm while covering large areas (typically 1 cm2).
During this presentation, I will demonstrate our utilization of pre-patterned stamps to induce the long-range alignment of different metal colloids and perovskite nanocrystals, to attain distinct optical properties, such as lattice resonances with high Q-factors. I will also show how nanoimprinting lithography can be used to produce chiral photonic architectures in an efficient and simple way. These chiral nanostructures support strong chiral resonances that are used to impart chirality to the emission of otherwise non chiral materials such as perovskite nanocrystals, quantum dots or dyes placed near the architecture and resulting in large values of circularly polarized photoluminescence reaching figures of merit (glum) beyond 1. [1,2]
This work has received funding from the Spanish Agencia Estatal de Investigación (AEI/MCIN MCIN/AEI/10.13039/501100011033) through grants PID2022-141956NB-I00 (OUTLIGHT), and CCEX2023-001263-S (Spanish Severo Ochoa Centre of Excellence program).
This research was also supported by the EIC PATHFINDER CHALLENGES project 101162112 (RADIANT), funded by the European Union.
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