Coupling colloidal quantum dot supraparticle microlasers with surface plasmon resonances via plasmonic gold substrates

Isaac Noman; Charlotte Eling; Pedro Alves; Nicolas Laurand

doi:10.1117/12.3017364

10 June 2024 Coupling colloidal quantum dot supraparticle microlasers with surface plasmon resonances via plasmonic gold substrates

Isaac Noman, Charlotte Eling, Pedro Alves, Nicolas Laurand

Author Affiliations +

Proceedings Volume 12991, Nanophotonics X; 129910P (2024) https://doi.org/10.1117/12.3017364
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

The miniaturization of semiconductor lasers to the nanoscale is difficult because of increasing losses as the laser cavity size approaches the wavelength of light, with some recent efforts focusing on high-refractive index dielectric materials and plasmonics to try and overcome this challenge. With this in mind, we immobilize CdSe1-xSx/ZnS Colloidal Quantum Dot (CQD) supraparticle (SuP) microlasers onto gold nanoparticle (AuNP) coated glass substrates. We study the interaction of the absorption, the non-resonant luminescence, and the Whispering Gallery Modes (WGMs) of SuPs with the Localized Surface Plasmon Resonances (LSPRs) of a AuNP substrate. This interaction produces an increase in LSPR peak intensity of 10%. The luminescence and the WGM-to-non-resonant-luminescence ratio are both significantly increased (x2) under continuous wave excitation at the LSPR wavelength. Individual SuPs can also still act as microlasers when pulsed optically pumped on AuNPs outside the LSPR at 355 nm. These findings suggest this platform as a candidate for further development towards electrically driven cw optical energy sources, presenting us a solution processable route to device miniaturization.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Isaac Noman, Charlotte Eling, Pedro Alves, and Nicolas Laurand "Coupling colloidal quantum dot supraparticle microlasers with surface plasmon resonances via plasmonic gold substrates", Proc. SPIE 12991, Nanophotonics X, 129910P (10 June 2024); https://doi.org/10.1117/12.3017364

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