Tuning of SiV quantum emission in nitrogen-doped nanodiamonds by dual-color excitation

• URL: http://arxiv.org/abs/2509.06500v1
• Date: Mon, 08 Sep 2025 10:06:40 GMT
• Title: Tuning of SiV quantum emission in nitrogen-doped nanodiamonds by dual-color excitation
• Authors: A. A. Zhivopistsev, A. M. Romshin, A. V. Gritsienko, D. G. Pasternak, R. K. Bagramov, V. P. Filonenko, F. M. Maksimov, A. I. Chernov, A. M. Skomorokhov, N. I. Kargin, I. I. Vlasov,
• Abstract summary: We demonstrate a controlled sixfold enhancement of SiV- photoluminescence under dual-color excitation.<n>The measured dependencies of SiV- PL lifetime and intensity on excitation wavelength, together with the enhancement dependence on Ns concentration in the studied nanodiamonds, provide unambiguous evidence of the involvement of donor nitrogen in SiV-emission dynamics.<n>These results unlock a practical pathway toward engineering optically-controlled and scalable quantum emitters based on SiV-luminescent diamond nanoparticles.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The charge dynamics of silicon-vacancy (SiV) centers have been investigated for the first time in high-pressure high-temperature nanodiamonds (NDs) with varying concentrations of substitutional nitrogen (Ns). We demonstrate a controlled sixfold enhancement of SiV- photoluminescence (PL) under dual-color excitation, consisting of strong red (~660 nm) illumination combined with weak green (~530 nm) excitation. The measured dependencies of SiV- PL lifetime and intensity on excitation wavelength, together with the enhancement dependence on Ns concentration in the studied nanodiamonds, provide unambiguous evidence of the involvement of donor nitrogen in SiV-emission dynamics. Saturation curves and second-order PL intensity correlation measurements further indicate suppression of the population of the optically inactive SiV2- state upon the addition of green excitation. These results unlock a practical pathway toward engineering optically-controlled and scalable quantum emitters based on SiV-luminescent diamond nanoparticles.

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