Abstract
Metasurfaces precisely control the amplitude, polarization and phase of light, with applications spanning imaging, sensing, modulation and computing. Three crucial performance metrics of metasurfaces and their constituent resonators are the quality factor (Q factor), mode volume (Vm) and ability to control far-field radiation. Often, resonators face a trade-off between these parameters: a reduction in Vm leads to an equivalent reduction in Q, albeit with more control over radiation. Here we demonstrate that this perceived compromise is not inevitable: high quality factor, subwavelength Vm and controlled dipole-like radiation can be achieved simultaneously. We design high quality factor, very-large-scale-integrated silicon nanoantenna pixels (VINPix) that combine guided mode resonance waveguides with photonic crystal cavities. With optimized nanoantennas, we achieve Q factors exceeding 1,500 with Vm less than 0.1 \({(\lambda /{n}_{{{{\rm{air}}}}})}^{3}\). Each nanoantenna is individually addressable by free-space light and exhibits dipole-like scattering to the far-field. Resonator densities exceeding a million nanoantennas per cm2 can be achieved. As a proof-of-concept application, we show spectrometer-free, spatially localized, refractive-index sensing, and fabrication of an 8 mm × 8 mm VINPix array. Our platform provides a foundation for compact, densely multiplexed devices such as spatial light modulators, computational spectrometers and in situ environmental sensors.
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Data availability
The data that support the plots and other findings in the work are available in the article and the supplementary information file, and are available from the corresponding authors on reasonable request.
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The source code for the calculations conducted in this study is available from the corresponding authors on reasonable request.
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Acknowledgements
The authors thank D. McCoy, F. Pan, B. Bourgeois and A. Dai for insightful discussions. The authors acknowledge funding from a NSF Waterman Award (grant number 1933624), which supported the salary of J.A.D.; the MURI (grant number N00014-23-1-2567), which supported the chip design, fabrication and salary of V.D. and S.D.; and the US Department of Energy, Office of Basic Energy Sciences (DE-SC0021984), which supported the chip characterization and salary of S.A. and H.C.D. V.D. was additionally supported by the Office of the Vice Provost for Graduate Education at Stanford through the Stanford Graduate Fellowship in Science and Engineering. H.B.B. acknowledges support from the NSF OCE-PRF (grant number: 2205990), the HHMI Hanna H. Gray Fellowship and the Stanford Sustainability Accelerator. S.D. was additionally supported by the Department of Defense (DOD) through the National Defense Science and Engineering (NDSEG) Fellowship Program. Part of this work was performed in part in the nano@Stanford labs, which are supported by the National Science Foundation as part of the National Nanotechnology Coordinated Infrastructure under award ECCS-2026822. Part of this work was performed at the Stanford Nano Shared Facilities (SNSF), supported by the National Science Foundation under award ECCS-2026822.
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V.D., J.H., M.L. and J.A.D. conceived and designed the experiments. V.D. conducted the theory and numerical simulations. V.D., S.D., S.A., H.C.D. and P.M. fabricated the nanostructured samples. V.D., H.B.B. and S.D. performed the optical characterization experiments. V.D. and K.C. analysed the collected experimental data. A.S., F.S. and V.D. conducted the scanning electron microscopic characterizations. J.A.D. conceived the idea and supervised the project, along with M.L., J.H. and H.B.B. on relevant portions of the research. All authors contributed to the preparation of the manuscript.
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J.H., F.S. and J.A.D. are shareholders in Pumpkinseed Technologies, Inc. The remaining authors declare no competing interests.
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Dolia, V., Balch, H.B., Dagli, S. et al. Very-large-scale-integrated high quality factor nanoantenna pixels. Nat. Nanotechnol. (2024). https://doi.org/10.1038/s41565-024-01697-z
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DOI: https://doi.org/10.1038/s41565-024-01697-z