Lasing from Brillouin Zone Folding Guided Resonances

Lasing from Brillouin Zone Folding Guided Resonances

ACS Nano

10.1021/acsnano.5c08419

https://doi.org/10.1021/acsnano.5c08419

Matthew R. Chua, Lu ding, Xiao Liang, Corentin Dabard, Wudeng Wang, Syed Akhil, Emek Goksu Durmusoglu, Febiana Tjiptoharsono, Hilmi Volkan Demir, Ramón Paniagua-Domínguez, Arseniy I. Kuznetsov

26 September 2025

Chua, M. R., Ding, L., Liang, X., Dabard, C., Wang, W., Akhil, S., Durmusoglu, E. G., Tjiptoharsono, F., Demir, H. V., Paniagua-Domínguez, R., & Kuznetsov, A. I. (2025). Lasing from Brillouin Zone Folding Guided Resonances. ACS Nano, 19(39), 34677–34685. https://doi.org/10.1021/acsnano.5c08419

High-quality factor (Q-factor) nanophotonic cavities are critical components in applications such as lasing and nonlinear optics. However, to obtain out-of-plane lasing emission and a low lasing threshold, the lasing mode must fulfill the contradictory requirement of coupling to the light cone while maintaining a high Q-factor. One relatively unexplored method to design such modes consists of using a Brillouin Zone folding guided resonance (BZF-GR) as the high Q-factor mode for lasing. In such a design, guided modes are “folded” into the light cone via periodic perturbations, allowing fine control of the Q-factor throughout momentum space. In this paper, we experimentally demonstrate the use of such a BZF-GR to achieve vertical emission lasing from a nanophotonic cavity with colloidal quantum dots as a gain medium. The lowest lasing threshold fluence under nanosecond pump is (20.4 ± 0.3) μJ cm–2. When considering the absorption, this value falls to (4.08 ± 0.08) μJ cm–2. This work presents a method of designing lasing modes that may be further developed for use in low-threshold nanoscale lasers.

Publisher Copyright

This research / project is supported by the National Research Foundation - National Research Foundation Investigatorship programme
Grant Reference no. : NRF-NRFI10-2024-0003

This research / project is supported by the Agency for Science, Technology and Research - Manufacturing, Trade, and Connectivity Programmatic Fund
Grant Reference no. : M21J9b0085

This research / project is supported by the TUBA-Turkish Academy of Sciences - National Leader Researchers Program (121C266)
Grant Reference no. : TUBITAK 2247-A

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see 10.1021/acsnano.5c08419.

https://oar.a-star.edu.sg/communities-collections/articles/22355

1936-0851
1936-086X

Institute of Materials Research and Engineering