Waveguide-Integrated Colloidal Nanocrystal Supraparticle Lasers.

ABSTRACT: 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_xSe_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 osci

SUBMITTER: Alves PU 

PROVIDER: S-EPMC10683367 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature