Sensing with near-infrared laser trapped fluorescent nanodiamonds

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Hauptverfasser:	Dervillez, Arthur, Kalantarifard, Fatemeh, Troise, Luca, Huck, Alexander, Berg-Sørensen, Kirstine
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	Applied Physics
Online-Zugang:	Acceder al recurso
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author	Dervillez, Arthur Kalantarifard, Fatemeh Troise, Luca Huck, Alexander Berg-Sørensen, Kirstine
author_facet	Dervillez, Arthur Kalantarifard, Fatemeh Troise, Luca Huck, Alexander Berg-Sørensen, Kirstine
contents	Biosensing based on optically trapped fluorescent nanodiamonds potentially allows to resolve biochemical processes inside living cells at a desired intracellular location. Towards this goal, we investigate near infrared (NIR) laser irradiation at 1064 nm on fluorescent nanodiamonds (FNDs) containing nitrogen-vacancy (NV) centers. The 1064 nm NIR wavelength is a popular choice for optical trapping because of its low absorption in bio-samples. By conducting comprehensive experiments, we aim to understand if and how NIR exposure influences the fluorescence and sensing capabilities of FNDs and to determine the potential implications for the use of FNDs in various sensing applications. Our experiments exposed FNDs to varying intensities of NIR laser light while carefully monitoring their optical and magnetic properties. Key measurements included all-optical fluorescence relaxation, optical spectroscopy, and optically detected magnetic resonance (ODMR) spectra. The findings reveal how increased NIR laser power correlates with alterations in ODMR central frequency but also that charge state dynamics under NIR irradiation of NV centers play a role. We demonstrate that FND biosensing works well with a protocol involving both NIR and green light, while mitigating the effect of NIR.
format	Preprint
id	arxiv_https___arxiv_org_abs_2501_07263
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Sensing with near-infrared laser trapped fluorescent nanodiamonds Dervillez, Arthur Kalantarifard, Fatemeh Troise, Luca Huck, Alexander Berg-Sørensen, Kirstine Applied Physics Biosensing based on optically trapped fluorescent nanodiamonds potentially allows to resolve biochemical processes inside living cells at a desired intracellular location. Towards this goal, we investigate near infrared (NIR) laser irradiation at 1064 nm on fluorescent nanodiamonds (FNDs) containing nitrogen-vacancy (NV) centers. The 1064 nm NIR wavelength is a popular choice for optical trapping because of its low absorption in bio-samples. By conducting comprehensive experiments, we aim to understand if and how NIR exposure influences the fluorescence and sensing capabilities of FNDs and to determine the potential implications for the use of FNDs in various sensing applications. Our experiments exposed FNDs to varying intensities of NIR laser light while carefully monitoring their optical and magnetic properties. Key measurements included all-optical fluorescence relaxation, optical spectroscopy, and optically detected magnetic resonance (ODMR) spectra. The findings reveal how increased NIR laser power correlates with alterations in ODMR central frequency but also that charge state dynamics under NIR irradiation of NV centers play a role. We demonstrate that FND biosensing works well with a protocol involving both NIR and green light, while mitigating the effect of NIR.
title	Sensing with near-infrared laser trapped fluorescent nanodiamonds
topic	Applied Physics
url	https://arxiv.org/abs/2501.07263

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