Resonant and non-resonant microcavity effects on nitrogen vacancy centres

Debojyoti Ray Chawdhury; Tulika Agrawal; Prem B. Bisht

doi:10.1117/12.3014208

10 June 2024 Resonant and non-resonant microcavity effects on nitrogen vacancy centres

Debojyoti Ray Chawdhury, Tulika Agrawal, Prem B. Bisht

Proceedings Volume 12991, Nanophotonics X; 129911K (2024) https://doi.org/10.1117/12.3014208
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

Nitrogen Vacancy (NV) centres in nanodiamonds (NDs) are excellent fluorophores. They find applications in bio-sensing, bio-imaging and as single photon emitters. The photoluminescence (PL) spectra of NV centres span over the visible-near IR region (500-900 nm). The spectra consist of temperature-dependent sharp characteristic peaks of neutral and negatively charged NV centres corresponding to Zero Phonon Line (ZPL) transition. When these NV centres are coupled with microcavities, sharp ripple-like resonant modes known as Whispering Gallery Modes (WGMs) are observed in the emission spectra. The time-resolved fluorescence of NV centres are found to be dependent on excitation and emission energies. The fluorescence decay of NV centres reveals the contribution of different charge states. In addition, jet-like structures (photonic nanojet, PNJs) are observed due to the non-resonant interaction of light and NV centre-coupled microcavity. The PNJs have been used to enhance the weak Raman scattering signal.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Debojyoti Ray Chawdhury, Tulika Agrawal, and Prem B. Bisht "Resonant and non-resonant microcavity effects on nitrogen vacancy centres", Proc. SPIE 12991, Nanophotonics X, 129911K (10 June 2024); https://doi.org/10.1117/12.3014208

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