Ultrafast photoluminescence and multiscale light amplification in nanoplasmonic cavity glass

Piotr Piotrowski (), Marta Buza, Rafał Nowaczyński, Nuttawut Kongsuwan, Hańcza B. Surma, Paweł Osewski, Marcin Gajc, Adam Strzep, Witold Ryba-Romanowski, Ortwin Hess () and Dorota A. Pawlak ()
Additional contact information
Piotr Piotrowski: Centre of Excellence ENSEMBLE3 sp. z o.o
Marta Buza: (Formerly at) Institute of Electronic Materials Technology
Rafał Nowaczyński: University of Warsaw
Nuttawut Kongsuwan: Quantum Technology Foundation (Thailand)
Hańcza B. Surma: Centre of Excellence ENSEMBLE3 sp. z o.o
Paweł Osewski: (Formerly at) Institute of Electronic Materials Technology
Marcin Gajc: (Formerly at) Institute of Electronic Materials Technology
Adam Strzep: Institute of Low Temperature and Structure Research PAS
Witold Ryba-Romanowski: Institute of Low Temperature and Structure Research PAS
Ortwin Hess: Trinity College Dublin
Dorota A. Pawlak: Centre of Excellence ENSEMBLE3 sp. z o.o

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Interactions between plasmons and exciton nanoemitters in plexcitonic systems lead to fast and intense luminescence, desirable in optoelectonic devices, ultrafast optical switches and quantum information science. While luminescence enhancement through exciton-plasmon coupling has thus far been mostly demonstrated in micro- and nanoscale structures, analogous demonstrations in bulk materials have been largely neglected. Here we present a bulk nanocomposite glass doped with cadmium telluride quantum dots (CdTe QDs) and silver nanoparticles, nAg, which act as exciton and plasmon sources, respectively. This glass exhibits ultranarrow, FWHM = 13 nm, and ultrafast, 90 ps, amplified photoluminescence (PL), λem≅503 nm, at room temperature under continuous-wave excitation, λexc = 405 nm. Numerical simulations confirm that the observed improvement in emission is a result of a multiscale light enhancement owing to the ensemble of QD-populated plasmonic nanocavities in the material. Power-dependent measurements indicate that >100 mW coherent light amplification occurs. These types of bulk plasmon-exciton composites could be designed comprising a plethora of components/functionalities, including emitters (QDs, rare earth and transition metal ions) and nanoplasmonic elements (Ag/Au/TCO, spherical/anisotropic/miscellaneous), to achieve targeted applications.

Date: 2024
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DOI: 10.1038/s41467-024-47539-3

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