Coupling Perovskite Quantum Dot Pairs in Solution using a Nanoplasmonic Assembly




Zhang, Hao
Moazzezi, Parinaz
Ren, Juanjuan
Henderson, Brett
Cordoba, Cristina
Yeddu, Vishal
Blackburn, Arthur M.
Saidaminov, Makhsud I.
Paci, Irina
Hughes, Stephen

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Nano Letters


Perovskite quantum dots (PQDs) provide a robust solution-based approach to efficient solar cells, bright light emitting devices, and quantum sources of light. Quantifying heterogeneity and understanding coupling between dots is critical for these applications. We use double-nanohole optical trapping to size individual dots and correlate to emission energy shifts from quantum confinement. We were able to assemble a second dot in the trap, which allows us to observe the coupling between dots. We observe a systematic red-shift of 1.1 ± 0.6 meV in the emission wavelength. Theoretical analysis shows that the observed shift is consistent with resonant energy transfer and is unusually large due to moderate-to-large quantum confinement in PQDs. This demonstrates the promise of PQDs for entanglement in quantum information applications. This work enables future in situ control of PQD growth as well as studies of the coupling between small PQD assemblies with quantum information applications in mind.



perovskite quantum dots, single-dot trapping, optical tweezer, optical assembly, heterogeneity, resonant energy transfer


Zhang, H., Moazzezi, P., Ren, J., Henderson, B., Cordoba, C., Yeddu, V., Blackburn, A. M., Saidaminov, M. I., Paci, I., Hughes, S., & Gordon, R. (2022). Coupling Perovskite Quantum Dot Pairs in Solution using a Nanoplasmonic Assembly. Nano Letters, 22(13), 5287–5293.