Modulation of nitrogen vacancy charge state and fluorescence in nanodiamonds using electrochemical potential

The negatively charged nitrogen vacancy (NV−) center in diamond has attracted strong interest for a wide range of sensing and quantum information processing applications. To this end, recent work has focused on controlling the NV charge state, whose stability strongly depends on its electrostatic environment. Here, we demonstrate that the charge state and fluorescence dynamics of single NV centers in nanodiamonds with different surface terminations can be controlled by an externally applied potential difference in an electrochemical cell. The voltage dependence of the NV charge state can be used to stabilize the NV− state for spin-based sensing protocols and provides a method of charge state-dependent fluorescence sensing of electrochemical potentials. We detect clear NV fluorescence modulation for voltage changes down to 100 mV, with a single NV and down to 20 mV with multiple NV centers in a wide-field imaging mode. These results suggest that NV centers in nanodiamonds could enable parallel optical detection of biologically relevant electrochemical potentials.

Download Full-text

Quantum-entanglement storage and extraction in quantum network node

International Journal of Quantum Information ◽

10.1142/s0219749918500090 ◽

2018 ◽

Vol 16 (01) ◽

pp. 1850009 ◽

Cited By ~ 1

Author(s):

ZhuoYu Shan ◽

Yong Zhang

Keyword(s):

Information Processing ◽

Quantum Information ◽

Quantum Entanglement ◽

Information Technologies ◽

Quantum Information Processing ◽

Bell State ◽

Nitrogen Vacancy ◽

Quantum Network ◽

Nuclear Spins ◽

Nv Centers

Quantum computing and quantum communication have become the most popular research topic. Nitrogen-vacancy (NV) centers in diamond have been shown the great advantage of implementing quantum information processing. The generation of entanglement between NV centers represents a fundamental prerequisite for all quantum information technologies. In this paper, we propose a scheme to realize the high-fidelity storage and extraction of quantum entanglement information based on the NV centers at room temperature. We store the entangled information of a pair of entangled photons in the Bell state into the nuclear spins of two NV centers, which can make these two NV centers entangled. And then we illuminate how to extract the entangled information from NV centers to prepare on-demand entangled states for optical quantum information processing. The strategy of engineering entanglement demonstrated here maybe pave the way towards a NV center-based quantum network.

Download Full-text

Spin coherent quantum transport of electrons between defects in diamond

Nanophotonics ◽

10.1515/nanoph-2019-0144 ◽

2019 ◽

Vol 8 (11) ◽

pp. 1975-1984 ◽

Cited By ~ 3

Author(s):

Lachlan M. Oberg ◽

Eric Huang ◽

Prithvi M. Reddy ◽

Audrius Alkauskas ◽

Andrew D. Greentree ◽

...

Keyword(s):

Quantum Transport ◽

Large Scale ◽

Quantum Information Processing ◽

Nitrogen Vacancy ◽

Small Scale ◽

Spin Quantum ◽

Quantum Bus ◽

On Chip ◽

Coherent Quantum ◽

Nv Centers

AbstractThe nitrogen-vacancy (NV) color center in diamond has rapidly emerged as an important solid-state system for quantum information processing. Whereas individual spin registers have been used to implement small-scale diamond quantum computing, the realization of a large-scale device requires the development of an on-chip quantum bus for transporting information between distant qubits. Here, we propose a method for coherent quantum transport of an electron and its spin state between distant NV centers. Transport is achieved by the implementation of spatial stimulated adiabatic Raman passage through the optical control of the NV center charge states and the confined conduction states of a diamond nanostructure. Our models show that, for two NV centers in a diamond nanowire, high-fidelity transport can be achieved over distances of order hundreds of nanometers in timescales of order hundreds of nanoseconds. Spatial adiabatic passage is therefore a promising option for realizing an on-chip spin quantum bus.

Download Full-text

Atomic Scale Magnetic Sensing and Imaging Based on Diamond NV Centers

Magnetometers - Fundamentals and Applications of Magnetism ◽

10.5772/intechopen.84204 ◽

2020 ◽

Cited By ~ 1

Author(s):

Myeongwon Lee ◽

Jungbae Yoon ◽

Donghun Lee

Keyword(s):

Magnetic Sensors ◽

Nitrogen Vacancy ◽

Atomic Scale ◽

Wide Field ◽

Spin Coherence ◽

Solid State Physics ◽

Operation Condition ◽

Wide Range ◽

Wide Field Of View ◽

Nv Center

The development of magnetic sensors simultaneously satisfying high magnetic sensitivity and high spatial resolution becomes more important in a wide range of fields including solid-state physics and life science. The nitrogen-vacancy (NV) center in diamond is a promising candidate to realize nanometer-scale magnetometry due to its excellent spin coherence properties, magnetic field sensitivity, atomic-scale size and versatile operation condition. Recent experiments successfully demonstrate the use of NV center in various sensing and imaging applications. In this chapter, we review the basic sensing mechanisms of the NV center and introduce imaging applications based on scanning magnetometry and wide field-of-view optics.

Download Full-text

NV-Diamond Magnetometer Using Electron Irradiation

MRS Proceedings ◽

10.1557/opl.2013.22 ◽

2013 ◽

Vol 1511 ◽

Cited By ~ 3

Author(s):

Edwin Kim ◽

Victor M. Acosta ◽

Erik Bauch ◽

Dmitry Budker ◽

Philip R. Hemmer

Keyword(s):

Electron Spin ◽

Electron Irradiation ◽

Spin Transition ◽

High Sensitivity ◽

Future Generation ◽

Nitrogen Vacancy ◽

Logic Device ◽

Wide Range ◽

Nv Center ◽

Nv Centers

ABSTRACTNitrogen-vacancy (NV) center in diamond is an emerging system for quantum-logic device and sensor applications. The key feature of the NV center is the ability of spin manipulation at room temperature. We apply a wide range of electron irradiation to generate the NV centers in nitrogen-rich diamond for creating best sensitivity. The NV0 and NV─ concentrations in electron irradiated diamond are determined from optical spectra. Additionally, electron spin resonance (ESR) has also proven to be an effective method for probing the electron spin transition between |ms=±1> and |ms=0> states of the NV centers. A study of ESR frequency shift and signal broadening and magnetometer sensitivity as a function of electron irradiation dose has been conducted. The research presented herein is a demonstration of minimum detectable magnetic field tailoring required for future-generation high-sensitivity diamond magnetometry.

Download Full-text

Long-term data storage in diamond

Science Advances ◽

10.1126/sciadv.1600911 ◽

2016 ◽

Vol 2 (10) ◽

pp. e1600911 ◽

Cited By ~ 35

Author(s):

Siddharth Dhomkar ◽

Jacob Henshaw ◽

Harishankar Jayakumar ◽

Carlos A. Meriles

Keyword(s):

Charge State ◽

Data Storage ◽

Storage Capacity ◽

Quantum Information Processing ◽

Super Resolution ◽

Nitrogen Vacancy ◽

Three Dimensions ◽

Long Term Storage ◽

Digital Video Disk

The negatively charged nitrogen vacancy (NV−) center in diamond is the focus of widespread attention for applications ranging from quantum information processing to nanoscale metrology. Although most work so far has focused on the NV− optical and spin properties, control of the charge state promises complementary opportunities. One intriguing possibility is the long-term storage of information, a notion we hereby introduce using NV-rich, type 1b diamond. As a proof of principle, we use multicolor optical microscopy to read, write, and reset arbitrary data sets with two-dimensional (2D) binary bit density comparable to present digital-video-disk (DVD) technology. Leveraging on the singular dynamics of NV− ionization, we encode information on different planes of the diamond crystal with no cross-talk, hence extending the storage capacity to three dimensions. Furthermore, we correlate the center’s charge state and the nuclear spin polarization of the nitrogen host and show that the latter is robust to a cycle of NV− ionization and recharge. In combination with super-resolution microscopy techniques, these observations provide a route toward subdiffraction NV charge control, a regime where the storage capacity could exceed present technologies.

Download Full-text

Deep learning enhanced individual nuclear-spin detection

npj Quantum Information ◽

10.1038/s41534-021-00377-3 ◽

2021 ◽

Vol 7 (1) ◽

Cited By ~ 1

Author(s):

Kyunghoon Jung ◽

M. H. Abobeih ◽

Jiwon Yun ◽

Gyeonghun Kim ◽

Hyunseok Oh ◽

...

Keyword(s):

Deep Learning ◽

Nuclear Spin ◽

Quantum Information Processing ◽

Nuclear Interaction ◽

Spin Systems ◽

Nitrogen Vacancy ◽

Atomic Scale ◽

Automatic Identification ◽

Nuclear Spins ◽

Wide Range

AbstractThe detection of nuclear spins using individual electron spins has enabled diverse opportunities in quantum sensing and quantum information processing. Proof-of-principle experiments have demonstrated atomic-scale imaging of nuclear-spin samples and controlled multi-qubit registers. However, to image more complex samples and to realize larger-scale quantum processors, computerized methods that efficiently and automatically characterize spin systems are required. Here, we realize a deep learning model for automatic identification of nuclear spins using the electron spin of single nitrogen-vacancy (NV) centers in diamond as a sensor. Based on neural network algorithms, we develop noise recovery procedures and training sequences for highly non-linear spectra. We apply these methods to experimentally demonstrate the fast identification of 31 nuclear spins around a single NV center and accurately determine the hyperfine parameters. Our methods can be extended to larger spin systems and are applicable to a wide range of electron-nuclear interaction strengths. These results pave the way towards efficient imaging of complex spin samples and automatic characterization of large spin-qubit registers.

Download Full-text

Chemical control of the charge state of nitrogen-vacancy centers in diamond

Physical Review B ◽

10.1103/physrevb.83.081304 ◽

2011 ◽

Vol 83 (8) ◽

Cited By ~ 198

Author(s):

M. V. Hauf ◽

B. Grotz ◽

B. Naydenov ◽

M. Dankerl ◽

S. Pezzagna ◽

...

Keyword(s):

Charge State ◽

Chemical Control ◽

Nitrogen Vacancy ◽

Nitrogen Vacancy Centers

Download Full-text

Localized chemical switching of the charge state of nitrogen-vacancy luminescence centers in diamond

Applied Physics Letters ◽

10.1063/1.4883229 ◽

2014 ◽

Vol 105 (6) ◽

pp. 063103 ◽

Cited By ~ 23

Author(s):

Toby W. Shanley ◽

Aiden A. Martin ◽

Igor Aharonovich ◽

Milos Toth

Keyword(s):

Charge State ◽

Nitrogen Vacancy ◽

Luminescence Centers

Download Full-text

Orthopteran DCMD neuron: a reevaluation of responses to moving objects. I. Selective responses to approaching objects

Journal of Neurophysiology ◽

10.1152/jn.1992.68.5.1654 ◽

1992 ◽

Vol 68 (5) ◽

pp. 1654-1666 ◽

Cited By ~ 147

Author(s):

F. C. Rind ◽

P. J. Simmons

Keyword(s):

Moving Objects ◽

Temporal Frequency ◽

Angular Acceleration ◽

Spike Rate ◽

Single Peak ◽

Wide Field ◽

Movement Detector ◽

Star Wars ◽

Wide Range ◽

Real Objects

1. The "descending contralateral movement detector" (DCMD) neuron in the locust has been challenged with a variety of moving stimuli, including scenes from a film (Star Wars), moving disks, and images generated by computer. The neuron responds well to any rapid movement. For a dark object moving along a straight path at a uniform velocity, the DCMD gives the strongest response when the object travels directly toward the eye, and the weakest when the object travels away from the eye. Instead of expressing selectivity for movements of small rather than large objects, the DCMD responds preferentially to approaching objects. 2. The neuron shows a clear selectivity for approach over recession for a variety of sizes and velocities of movement both of real objects and in simulated movements. When a disk that subtends > or = 5 degrees at the eye approaches the eye, there are two peaks in spike rate: one immediately after the start of movement; and a second that builds up during the approach. When a disk recedes from the eye, there is a single peak in response as the movement starts. There is a good correlation between spike rate and angular acceleration of the edges of the image over the eye. 3. When an object approaches from a distance sufficient for it to subtend less than one interommatidial angle at the start of its approach, there is a single peak in response. The DCMD tracks the approach, and, if the object moves at 1 m/s or faster, the spike rate increases throughout the duration of object movement. The size of the response depends on the speed of approach. 4. It is unlikely that the DCMD encodes the time to collision accurately, because the response depends on the size as well as the velocity of an approaching object. 5. Wide-field movements suppress the response to an approaching object. The suppression varies with the temporal frequency of the background pattern. 6. Over a wide range of contrasts of object against background, the DCMD gives a stronger response to approaching than to receding objects. For low contrasts, the selectivity is greater for objects that are darker than the background than for objects that are lighter.

Download Full-text

Investigation of evaporation of sessile droplets using luminescent nano-probes and other applications of NV centers in diamond

EPJ Web of Conferences ◽

10.1051/epjconf/201819002008 ◽

2018 ◽

Vol 190 ◽

pp. 02008

Author(s):

Taras Plakhotnik ◽

Haroon Aman

Keyword(s):

Fluid Mechanics ◽

Spatial Resolution ◽

High Spatial Resolution ◽

Solid Substrate ◽

Model System ◽

Nitrogen Vacancy ◽

Dynamic Processes ◽

Nitrogen Vacancy Centers ◽

Nv Centers

The paper describes application of diamond nano crystals to research on dynamic processes in small (less than 1 mm across) evaporating droplets deposited on a solid substrate. Such droplets are used as a model system for testing proposed bio applications of nitrogen-vacancy centers in diamond. We demonstrate that a high spatial resolution of our methods reveals unexpected features of the evaporation and fluid mechanics in such droplets.

Download Full-text