Download file (1.66 MB)
Download as zip (1.6 MB)

Collection

Citation

Description:

Enhancing light–matter interactions with photonic structures is critical in classical and quantum nanophotonics. Recently, Moiré twisted bilayer optical materials have been proposed as a promising means toward a tunable platform for nanophotonic devices. However, the realization of Moiré photonic crystal (PhC) cavities has been challenging, due to a lack of advanced nanofabrication techniques and availability of stand-alone transparent membranes. Here, we leverage the properties of the van der Waals material hexagonal boron nitride to realize Moiré bilayer PhC cavities. We design and fabricate a range of devices with controllable twist angles, with flatband modes in the visible spectral range (∼450 nm). Optical characterization confirms the presence of spatially periodic cavity modes originating from the engineered dispersion relation (flatband). Our findings present a major step toward harnessing a two-dimensional van der Waals material for the next generation of on chip, twisted nanophotonic systems.

Rights:

• In Copyright
  

  This document is the Accepted Manuscript version of a Published Article that appeared in final form in Nano Letters, copyright © 2025 American Chemical Society. To access the final published article see https://doi.org/10.1021/acs.nanolett.5c03959.

Keyword: Moiré photonic crysta, Hexagonal boron nitride, Flatband

Date published: 2025-10-01

Publisher: American Chemical Society (ACS)

Journal:

• Nano Letters (ISSN: 15306984) vol. 25 issue. 39 p. 14459-14466

Funding:

• National Research Foundation of Korea 2022M3H4A1A04096396
• National Research Foundation of Korea RS-2023-00254055
• Air Force Office of Scientific Research FA2386-25-1-4044
• Australian Research Council CE200100010
• Australian Research Council DP240103127
• Australian Research Council FT220100053
• Office of Naval Research Global N62909-22-1-2028
• Japan Society for the Promotion of Science 21H05233
• Japan Society for the Promotion of Science 23H02052

Manuscript type: Author's version (Accepted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1021/acs.nanolett.5c03959

Related item:

Other identifier(s):

Contact agent:

Updated at: 2026-06-26 14:16:31 +0900

Published on MDR: 2026-09-17 08:25:43 +0900