Cavity-Defined van der Waals Plasmonic Nanolasers Enabled by Out-Of-Plane Dipole Coupling.

Yong Liu, Xiaoqin Liao, Xingxia Sun, Xiao Yi, Jiaxin Wu, Yi Li, Shula Chen, Anlian Pan

Abstract read

In one paragraph

Article in Advanced materials (Deerfield Beach, Fla.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Yong LiuHunan Institute of Optoelectronic Integration and Key Laboratory For Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.

Xiaoqin LiaoHunan Institute of Optoelectronic Integration and Key Laboratory For Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.

Xingxia SunScience and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, P. R. China.

Xiao YiHunan Institute of Optoelectronic Integration and Key Laboratory For Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.

Jiaxin WuHunan Institute of Optoelectronic Integration and Key Laboratory For Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.

Yi LiHunan Institute of Optoelectronic Integration and Key Laboratory For Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.

Shula ChenHunan Institute of Optoelectronic Integration and Key Laboratory For Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.

Anlian PanHunan Institute of Optoelectronic Integration and Key Laboratory For Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.ORCID https://orcid.org/0000-0003-3335-3067

Funding

China Postdoctoral Science Foundation BX20230115Key Program of Science and Technology Department of Hunan Province 2019XK2001Key Program of Science and Technology Department of Hunan Province 2020XK2001Key Research and Development Plan of Hunan Province 2023GK2012National Key R&D Program of China 2022YFA1204300National Natural Science Foundation of China 52221001National Natural Science Foundation of China 62090035National Natural Science Foundation of China 62175061National Natural Science Foundation of China 62474063

6 · The paper itself

Abstract

Plasmonic nanolasers enable deeply subwavelength coherent light sources but are often limited by rigid cavity designs and demanding gain conditions. Here, a cavity-defined plasmonic nanolaser platform is realized through van der Waals integration of layered Indium Selenide (InSe) gain media with lithographically engineered Au cavities separated by an ultrathin hexagonal boron nitride (hBN) spacer. Owing to the direct bandgap and predominantly out-of-plane (OP) emission dipole of InSe, efficient coupling to surface plasmon polariton (SPP) modes is achieved. Clear near-infrared (NIR) lasing characteristics, including a well-defined threshold, pronounced linewidth narrowing, and a drastic reduction of carrier lifetime, are observed under optical pumping. A plasmonic lasing regime below the optical-mode cutoff is identified, with lasing sustained for InSe thicknesses down to 79 nm, well beyond the limit of conventional photonic-mode lasers. Spatially resolved spectroscopy and numerical simulations reveal that the lasing feedback is governed by cavity-defined SPP modes. In addition, deterministic control of lasing behavior is achieved by engineering Au cavities with diverse geometries, establishing a versatile and general plasmonic nanolaser architecture.

Indexed as

2D semiconductorscavity‐defined feedbackout‐of‐plane dipoleplasmonic nanolasersurface plasmon polaritons

Identifiers

PMID42436610

DOI10.1002/adma.73996

PMCPMC13486251

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.