Coupling colloidal quantum dot supraparticle microlasers with surface plasmon resonances via plasmonic gold substrates
Noman, Isaac and Eling, Charlotte and dos Santos Alves, Pedro and Laurand, Nicolas (2024) Coupling colloidal quantum dot supraparticle microlasers with surface plasmon resonances via plasmonic gold substrates. Proceedings of SPIE: The International Society for Optical Engineering, 12991. 129910P. ISSN 0277-786X (https://doi.org/10.1117/12.3017364)
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Abstract
The miniaturisation 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 localised 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 miniaturisation.
ORCID iDs
Noman, Isaac, Eling, Charlotte ORCID: https://orcid.org/0000-0002-3819-2728, dos Santos Alves, Pedro ORCID: https://orcid.org/0000-0003-3447-6878 and Laurand, Nicolas ORCID: https://orcid.org/0000-0003-0486-4300;-
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Item type: Article ID code: 90493 Dates: DateEvent10 June 2024Published1 April 2024AcceptedNotes: Copyright © 2024 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. Subjects: Science > Physics > Plasma physics. Ionized gases Department: Faculty of Science > Physics > Institute of Photonics
Technology and Innovation Centre > Photonics
Faculty of Science > PhysicsDepositing user: Pure Administrator Date deposited: 06 Sep 2024 01:14 Last modified: 02 Oct 2024 16:01 URI: https://strathprints.strath.ac.uk/id/eprint/90493