Eng, J. J. H., Liu, Y., Shang, Q., Paniagua-Dominguez, R., Cai, H., Dong, Z., & Gao, W. (2026). Polarized and Directional Single-Photon Emission in WSe2 Enhanced by q‑BIC Nanoantennae. Nano Letters, 26(22), 7322–7330. https://doi.org/10.1021/acs.nanolett.6c01015
Abstract:
Atomically thin transitionmetal dichalcogenides
(TMDs)arepromisingplatformsforquantumphotonicsowingto
their ability tohost strain-inducedsingle-photonemitters(SPEs)
thatcanbeintegratedwithphotonicnanostructures.However, the
typicallyrandompolarizationandnear-isotropicemissionof these
emitters present challenges for controlled photon routing and
photonic integration. Here, we demonstrate polarized and
directional single-photonemission fromWSe2 coupled toanall
dielectric nanoantenna supporting a quasi-bound state in the
continuum(q-BIC). Relative to off-antenna emitters, antenna
coupledemitters exhibit similar linear polarizationandmodified
far-field radiation patterns. Time-resolved photoluminescence
measurements indicated an effective Purcell factor of ∼10,
consistent with coupling to the q-BICmode. Together, these
resultsdemonstratethatq-BICnanoantennaeprovideaneffectiveapproachforengineeringthepolarization,emissiondirection,and
radiativedynamicsofTMD-basedSPEs, offeringapathwaytowardengineeredemitter−photoninterfaces inintegratedquantum
photonicsystems.
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Funding Info:
This research / project is supported by the A*STAR - Career Development Fund
Grant Reference no. : C243512003
This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : NRF-CRP22 2019-0004, NRF-CRP30-2023-0003, NRF-CRP31-0001
This research / project is supported by the National Research Foundation - ITC
Grant Reference no. : NRF2023-ITC004-001
This research / project is supported by the National Research Foundation - Mid-Sized Grant
Grant Reference no. : NRF-MSG-2023-0002
This research / project is supported by the Ministry of Education - Academic Research Fund Tier 2
Grant Reference no. : MOE T2EP50221-0005, MOE-T2EP50222-0018