Optical properties of color centers in nanodiamonds fabricated by detonation process

Yuto Makino; Yoshiki Saito; Masaaki Ashida

doi:10.1117/12.3008384

20 September 2023 Optical properties of color centers in nanodiamonds fabricated by detonation process

Yuto Makino, Yoshiki Saito, Masaaki Ashida

Proceedings Volume 12606, Optical Manipulation and Structured Materials Conference; 126061G (2023) https://doi.org/10.1117/12.3008384
Event: Optics and Photonics International Congress, 2023, Yokohama, Japan

Abstract

Nanodiamonds (NDs) containing silicon- or germanium-vacancy centers (SiV- or GeV-NDs, respectively) have shown promising potential as fluorescent markers for bioapplications. Recently fabrications of ~10 nm-sized SiV- and GeV-NDs were demonstrated by a detonation process that enables practical-scale NDs production. In the present study, the optical properties of the SiV- and GeV-NDs, a recent addition to the family of fluorescent NDs, were spectroscopically investigated. Their luminescence bands including each zero-phonon line commonly have small Debye-Waller factors (0.47 and 0.20, respectively) and broad linewidths (32 and 59 meV, respectively) at room temperature, comparing with those of typical SiV and GeV centers. These differences in the optical properties were due to the effects of lattice distortions and surface potentials from tiny-sized diamonds. The SiV- and GeV-NDs fabricated by the detonation process are interesting materials not only in the biomedical field but also in the study of optical manipulation.

Citation Download Citation

Yuto Makino, Yoshiki Saito, and Masaaki Ashida "Optical properties of color centers in nanodiamonds fabricated by detonation process", Proc. SPIE 12606, Optical Manipulation and Structured Materials Conference, 126061G (20 September 2023); https://doi.org/10.1117/12.3008384

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