scholarly journals Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond

Nanophotonics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 393-401
Author(s):  
Raymond A. Wambold ◽  
Zhaoning Yu ◽  
Yuzhe Xiao ◽  
Benjamin Bachman ◽  
Gabriel Jaffe ◽  
...  
Keyword(s):  
Time Domain ◽  
Silicon Layer ◽  
Optical Power ◽  
Nitrogen Vacancy ◽  
Diamond Surface ◽  
Far Field ◽  
Fabrication Errors ◽  
Nv Center ◽  
Nitrogen Vacancy Centers ◽  
Bulk Diamond

AbstractWe designed a nanoscale light extractor (NLE) for the efficient outcoupling and beaming of broadband light emitted by shallow, negatively charged nitrogen-vacancy (NV) centers in bulk diamond. The NLE consists of a patterned silicon layer on diamond and requires no etching of the diamond surface. Our design process is based on adjoint optimization using broadband time-domain simulations and yields structures that are inherently robust to positioning and fabrication errors. Our NLE functions like a transmission antenna for the NV center, enhancing the optical power extracted from an NV center positioned 10 nm below the diamond surface by a factor of more than 35, and beaming the light into a ±30° cone in the far field. This approach to light extraction can be readily adapted to other solid-state color centers.

scholarly journals Nitrogen-Terminated Diamond Surface for Nanoscale NMR by Shallow Nitrogen-Vacancy Centers

2019 ◽  
Vol 123 (6) ◽  
pp. 3594-3604 ◽  
Author(s):  
Sora Kawai ◽  
Hayate Yamano ◽  
Takahiro Sonoda ◽  
Kanami Kato ◽  
Jorge J. Buendia ◽  
...  
Keyword(s):  
Nitrogen Vacancy ◽  
Diamond Surface ◽  
Nitrogen Vacancy Centers

scholarly journals A biocompatible technique for magnetic field sensing at (sub)cellular scale using Nitrogen-Vacancy centers

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Ettore Bernardi ◽  
Ekaterina Moreva ◽  
Paolo Traina ◽  
Giulia Petrini ◽  
Sviatoslav Ditalia Tchernij ◽  
...  
Keyword(s):  
Small Volume ◽  
Optical Power ◽  
Nitrogen Vacancy ◽  
Small Scale ◽  
Nitrogen Vacancy Centers ◽  
Magnetic Sensitivity ◽  
Sensitivity Changes ◽  
Set Up ◽  
Spin Resonances ◽  
Lock In

Abstract We present an innovative experimental set-up that uses Nitrogen-Vacancy centres in diamonds to measure magnetic fields with the sensitivity of $\eta =68\pm 3~\mathrm{nT}/\sqrt{\mathrm{Hz}}$ η = 68 ± 3 nT / Hz at demonstrated (sub)cellular scale. The presented method of magnetic sensing, utilizing a lock-in based ODMR technique for the optical detection of microwave-driven spin resonances induced in NV centers, is characterized by the excellent magnetic sensitivity at such small scale and the full biocompatibility. The cellular scale is obtained using a NV-rich sensing layer of 15 nm thickness along z axis and a focused laser spot of $(10 \times 10)~\mu\mathrm{m}^{2}$ ( 10 × 10 ) μ m 2 in x-y plane. The biocompatibility derives from an accurate choice of the applied optical power. For this regard, we also report how the magnetic sensitivity changes for different applied laser power and discuss the limits of the sensitivity sustainable with biosystem at such small volume scale. As such, this method offers a whole range of research possibilities for biosciences.

scholarly journals Efficient generation of nitrogen vacancy centers by laser writing close to the diamond surface with a layer of silicon nanoballs

2020 ◽  
Vol 22 (1) ◽  
pp. 013006 ◽  
Author(s):  
Youying Rong ◽  
Zhiping Ju ◽  
Qiang Ma ◽  
Shikang Liu ◽  
Chengda Pan ◽  
...  
Keyword(s):  
Nitrogen Vacancy ◽  
Diamond Surface ◽  
Laser Writing ◽  
Efficient Generation ◽  
Nitrogen Vacancy Centers

scholarly journals Divergent effects of laser irradiation on ensembles of nitrogen-vacancy centers in bulk and nano-diamonds: implications for biosensing

2021 ◽  
Author(s):  
Domingo Olivares Postigo ◽  
Federico Gorrini ◽  
Valeria Bitonto ◽  
Johannes Ackermann ◽  
Rakshyakar Giri ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Laser Power ◽  
Surface Effects ◽  
Nitrogen Vacancy ◽  
Spin Order ◽  
Surface Areas ◽  
Nitrogen Vacancy Centers ◽  
Fluorescent Nanodiamonds ◽  
Optically Detected ◽  
Bulk Diamond

Ensembles of negatively charged nitrogen vacancy centers (NV-) in diamond have been proposed for sensing of magnetic fields and paramagnetic agents, and as a source of spin-order for the hyperpolarization of nuclei in magnetic resonance applications. To this end, strongly fluorescent nanodiamonds represent promising materials, with large surface areas and dense ensembles of NV-. However, surface effects tend to favor the less useful neutral form, the NV0 centers. Here, we study the fluorescence properties and optically detected magnetic resonance (ODMR) of NV- centers as a function of laser power in strongly fluorescent bulk diamond and in nanodiamonds obtained by nanomilling the native material. In bulk diamond, we find that increasing laser power increases ODMR contrast, consistent with a power-dependent increase in spin-polarization. Surprisingly, in nanodiamonds we observe a non-monotonic behavior, with a decrease in ODMR contrast at higher laser power that can be ascribed to more efficient NV-→NV0 photoconversion in nanodiamonds compared to bulk diamond, resulting in depletion of the NV- pool. We also studied this phenomenon in cell cultures following internalization of NDs in macrophages. Our findings show that surface effects in nanodiamonds substantially affect the NV properties and provide indications for the adjustment of experimental parameters.

Controlling the fluorescence properties of nitrogen vacancy centers in nanodiamonds

Nanoscale ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 1770-1783 ◽  
Author(s):  
Christian Laube ◽  
Thomas Oeckinghaus ◽  
Jan Lehnert ◽  
Jan Griebel ◽  
Wolfgang Knolle ◽  
...  
Keyword(s):  
Formation Process ◽  
Nitrogen Vacancy ◽  
Fluorescence Properties ◽  
Surface Parameters ◽  
Nv Center ◽  
Nitrogen Vacancy Centers

Controlled enhancement of NV center fluorescence in nanodiamonds via control over the formation process and surface parameters.

scholarly journals Ground-State Depletion Nanoscopy of Nitrogen-Vacancy Centres in Nanodiamonds

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Jelle Storterboom ◽  
Martina Barbiero ◽  
Stefania Castelletto ◽  
Min Gu
Keyword(s):  
Single Molecule ◽  
Ground State ◽  
Nitrogen Concentration ◽  
Super Resolution ◽  
Optical Power ◽  
Stimulated Emission ◽  
Nitrogen Vacancy ◽  
Resolution Imaging ◽  
Localisation Microscopy ◽  
Bulk Diamond

AbstractThe negatively charged nitrogen-vacancy ($${\text{NV}}^{ - }$$ NV - ) centre in nanodiamonds (NDs) has been recently studied for applications in cellular imaging due to its better photo-stability and biocompatibility if compared to other fluorophores. Super-resolution imaging achieving 20-nm resolution of $${\text{NV}}^{ - }$$ NV - in NDs has been proved over the years using sub-diffraction limited imaging approaches such as single molecule stochastic localisation microscopy and stimulated emission depletion microscopy. Here we show the first demonstration of ground-state depletion (GSD) nanoscopy of these centres in NDs using three beams, a probe beam, a depletion beam and a reset beam. The depletion beam at 638 nm forces the $${\text{NV}}^{ - }$$ NV - centres to the metastable dark state everywhere but in the local minimum, while a Gaussian beam at 594 nm probes the $${\text{NV}}^{ - }$$ NV - centres and a 488-nm reset beam is used to repopulate the excited state. Super-resolution imaging of a single $${\text{NV}}^{ - }$$ NV - centre with a full width at half maximum of 36 nm is demonstrated, and two adjacent $${\text{NV}}^{ - }$$ NV - centres separated by 72 nm are resolved. GSD microscopy is here applied to $${\text{NV}}^{ - }$$ NV - in NDs with a much lower optical power compared to bulk diamond. This work demonstrates the need to control the NDs nitrogen concentration to tailor their application in super-resolution imaging methods and paves the way for studies of $${\text{NV}}^{ - }$$ NV - in NDs’ nanoscale interactions.

scholarly journals Optical far-field super-resolution microscopy using nitrogen vacancy center ensemble in bulk diamond

2016 ◽  
Vol 109 (11) ◽  
pp. 111107 ◽  
Author(s):  
Shen Li ◽  
Xiang-dong Chen ◽  
Bo-Wen Zhao ◽  
Yang Dong ◽  
Chong-Wen Zou ◽  
...  
Keyword(s):  
Super Resolution ◽  
Nitrogen Vacancy ◽  
Far Field ◽  
Nitrogen Vacancy Center ◽  
Bulk Diamond ◽  
Super Resolution Microscopy ◽  
Vacancy Center

Luminescence landscapes of nitrogen-vacancy centers in diamond: quasi-localized vibrational resonances and selective coupling

2019 ◽  
Vol 7 (26) ◽  
pp. 8086-8091 ◽  
Author(s):  
Zhicheng Su ◽  
Zeyang Ren ◽  
Yitian Bao ◽  
Xiangzhou Lao ◽  
Jinfeng Zhang ◽  
...  
Keyword(s):  
Photoluminescence Spectrum ◽  
Room Temperature ◽  
Near Field ◽  
Nitrogen Vacancy ◽  
Atomic Arrangement ◽  
Local Atomic Arrangement ◽  
Nv Center ◽  
Nitrogen Vacancy Centers ◽  
Vibrational Resonances

77 K micro-photoluminescence spectrum, room-temperature near-field photoluminescence image, and a local atomic arrangement of the nitrogen-vacancy (NV) center in diamond.

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