Waveguide-Integrated Colloidal Nanocrystal Supraparticle Lasers.

Autor: Alves PU; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K., Guilhabert BJE; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K., McPhillimy JR; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K., Jevtics D; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K., Strain MJ; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K., Hejda M; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K., Cameron D; Department of Physics, SUPA, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG, U.K., Edwards PR; Department of Physics, SUPA, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG, U.K., Martin RW; Department of Physics, SUPA, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG, U.K., Dawson MD; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K., Laurand N; Institute of Photonics, Department of Physics, SUPA, Technology and Innovation Centre, University of Strathclyde, 99 George Street, Glasgow G1 1RD, U.K.
Jazyk: angličtina
Zdroj: ACS applied optical materials [ACS Appl Opt Mater] 2023 Nov 15; Vol. 1 (11), pp. 1836-1846. Date of Electronic Publication: 2023 Nov 15 (Print Publication: 2023).
DOI: 10.1021/acsaom.3c00312
Abstrakt: Supraparticle (SP) microlasers fabricated by the self-assembly of colloidal nanocrystals have great potential as coherent optical sources for integrated photonics. However, their deterministic placement for integration with other photonic elements remains an unsolved challenge. In this work, we demonstrate the manipulation and printing of individual SP microlasers, laying the foundation for their use in more complex photonic integrated circuits. We fabricate CdS x Se 1-x /ZnS colloidal quantum dot (CQD) SPs with diameters from 4 to 20 μm and Q-factors of approximately 300 via an oil-in-water self-assembly process. Under a subnanosecond-pulse optical excitation at 532 nm, the laser threshold is reached at an average number of excitons per CQD of 2.6, with modes oscillating between 625 and 655 nm. Microtransfer printing is used to pick up individual CQD SPs from an initial substrate and move them to a different one without affecting their capability for lasing. As a proof of concept, a CQD SP is printed on the side of an SU-8 waveguide, and its modes are successfully coupled to the waveguide.
Competing Interests: The authors declare no competing financial interest.
(© 2023 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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