Temporal dynamics of quasi-BIC near fields in plasmonic-dielectric metasurfaces

Femius Koenderink; Radoslaw Kolkowski

doi:10.1117/12.3027470

3 October 2024 Temporal dynamics of quasi-BIC near fields in plasmonic-dielectric metasurfaces

Femius Koenderink, Radoslaw Kolkowski

Author Affiliations +

Proceedings Volume PC13110, Active Photonic Platforms (APP) 2024; PC131100A (2024) https://doi.org/10.1117/12.3027470
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

Controlling near-field in space and time is crucial to applications of high-Q nonlocal metasurfaces, for instance for their use in nonlinear frequency conversion. We discuss near-field interferometric autocorrelation (IAC) measurements that reveal the dynamics of optical fields of quasi-bound states in the continuum (quasi-BICs) in plasmonic-dielectric metasurfaces. Using two-photon excited luminescence (TPEL) from quantum dots as local probes, our IAC measurements probe resonant near-field enhancement. Femtosecond laser pulse excitation of quasi-BICs produces coherent oscillations visible in TPEL, offering insights into resonances and their temporal beating. We discuss application scenarios for frequency-converting nonlinear metasurfaces in XUV generation and wafer metrology, as well as strategies for achieving high metasurface Q factors in metallic and dielectric systems.

Conference Presentation

Citation Download Citation

Femius Koenderink and Radoslaw Kolkowski "Temporal dynamics of quasi-BIC near fields in plasmonic-dielectric metasurfaces", Proc. SPIE PC13110, Active Photonic Platforms (APP) 2024, PC131100A (3 October 2024); https://doi.org/10.1117/12.3027470

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KEYWORDS

Near field

Extreme ultraviolet

Femtosecond pulse shaping

Near field optics

Quantum enhancement

Quantum fields

Quantum probes

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