Dielectric Fano Nanoantennas for Enabling Sub‐Nanosecond Lifetimes in NV‐Based Single Photon Emitters

Dielectric Fano Nanoantennas for Enabling Sub‐Nanosecond Lifetimes in NV‐Based Single Photon Emitters

Advanced Functional Materials

10.1002/adfm.202425343

https://doi.org/10.1002/adfm.202425343

Shu An, Dmitry kalashnikov, Wenqiao Shi, Zackaria Mahfoud, Ah Bian Chew, Yan Liu, Jing Wu, Di Zhu, Weibo Gao, Cheng‐Wei Qiu, Victor Leong, Zhaogang Dong

dielectric metasurfaces, fano resonance, NV center, purcell enhancement, single photon emitter

16 February 2025

An, S., Kalashnikov, D., Shi, W., Mahfoud, Z., Chew, A. B., Liu, Y., Wu, J., Zhu, D., Gao, W., Qiu, C., Leong, V., & Dong, Z. (2025). Dielectric Fano Nanoantennas for Enabling Sub‐Nanosecond Lifetimes in NV‐Based Single Photon Emitters. Advanced Functional Materials. Portico. https://doi.org/10.1002/adfm.202425343

Solid‐state quantum emitters are essential sources of single photons, and enhancing their emission rates is of paramount importance for applications in quantum communications, computing, and metrology. One approach is to couple quantum emitters with resonant photonic nanostructures, where the emission rate is enhanced due to the Purcell effect. Dielectric nanoantennas are promising as they provide strong emission enhancement compared to plasmonic ones, which suffer from high Ohmic loss. Here, a dielectric Fano resonator is designed and fabricated based on a pair of silicon (Si) ellipses and a disk, which supports the mode hybridization between quasi‐bound‐states‐in‐the‐continuum (quasi‐BIC) and Mie resonance. The performance of the developed resonant system is demonstrated by interfacing it with single photon emitters (SPEs) based on nitrogen‐vacancy (NV) centers in nanodiamonds (NDs). It is observed that the interfaced emitters have a Purcell enhancement factor of ≈10, with sub‐ns emission lifetime and a polarization contrast of 9. The results indicate a promising method for developing efficient and compact single‐photon sources for integrated quantum photonics applications.

Publisher Copyright

This research / project is supported by the Agency for Science, Technology and Research - Career Development Award
Grant Reference no. : C210112019

This research / project is supported by the Agency for Science, Technology and Research - Manufacturing, Trade, and Connectivity (MTC) Individual Research Grant
Grant Reference no. : M21K2c0116

This research / project is supported by the Agency for Science, Technology and Research - Manufacturing, Trade, and Connectivity (MTC) Individual Research Grant
Grant Reference no. : M22K2c0088

This research / project is supported by the National Research Foundation, Singapore - Quantum Engineering Programme 2.0
Grant Reference no. : NRF2021-QEP2-03-P09

This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : NRF-CRP30-2023-0003

This research is supported by core funding from: Agency for Science, Technology and Research Delta Q 2.0
Grant Reference no. : C230917005

This is the peer reviewed version of the following article: An, S., Kalashnikov, D., Shi, W., Mahfoud, Z., Chew, A. B., Liu, Y., Wu, J., Zhu, D., Gao, W., Qiu, C., Leong, V., & Dong, Z. (2025). Dielectric Fano Nanoantennas for Enabling Sub‐Nanosecond Lifetimes in NV‐Based Single Photon Emitters. Advanced Functional Materials. Portico, which has been published in final form at https://doi.org/10.1002/adfm.202425343. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

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