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Laser devices produced through solution-processed perovskite quantum dots (QDs) offer broad spectral tunability as well as ease of fabrication. Utilizing quasi-BIC modes, solution-processed QD laser devices have been demonstrated with a nanostructure coated in a thin-film gain media configuration. However, light leakage through thin-film guiding from the cavity side edges becomes more pronounced when shrinking the cavity size, posing challenges for the miniaturization of quasi-BIC-based lasers. Here, the fabrication of well-defined patterns of QDs via a solution process allows us to take advantage of the pattern edges to reduce losses through the cavity edges. We report a single-mode BIC laser by using CsPbBr3 QDs with a narrow linewidth below 0.1 nm. Importantly, we realize a miniaturized quasi-BIC laser with a size as small as 10×10 μm², making it the smallest among existing solution-processed BIC lasers. This work provides a strategy for developing ultra-compact BIC lasers via solution-processed gain media.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Bound states in the continuum, Perovskite, Solution-processed quantum dot, Nanolaser

Date published: 2024-02-22

Publisher: Wiley

Journal:

• Advanced Functional Materials (ISSN: 1616301X)

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Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1002/adfm.202314953

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Updated at: 2024-05-22 08:30:14 +0900

Published on MDR: 2024-05-22 08:30:14 +0900