Article

Sensing electric fields using single diamond spins

03/2011;
Source: arXiv

ABSTRACT The ability to sensitively detect charges under ambient conditions would be a
fascinating new tool benefitting a wide range of researchers across
disciplines. However, most current techniques are limited to low-temperature
methods like single-electron transistors (SET), single-electron electrostatic
force microscopy and scanning tunnelling microscopy. Here we open up a new
quantum metrology technique demonstrating precision electric field measurement
using a single nitrogen-vacancy defect centre(NV) spin in diamond. An AC
electric field sensitivity reaching ~ 140V/cm/\surd Hz has been achieved. This
corresponds to the electric field produced by a single elementary charge
located at a distance of ~ 150 nm from our spin sensor with averaging for one
second. By careful analysis of the electronic structure of the defect centre,
we show how an applied magnetic field influences the electric field sensing
properties. By this we demonstrate that diamond defect centre spins can be
switched between electric and magnetic field sensing modes and identify
suitable parameter ranges for both detector schemes. By combining magnetic and
electric field sensitivity, nanoscale detection and ambient operation our study
opens up new frontiers in imaging and sensing applications ranging from
material science to bioimaging.

1 Bookmark
 · 
94 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: The electrification of polymethyl methacrylate films is studied by scanning force microscopy. Charged areas generated by contact electrification are always found to be larger than those generated by corona discharge, and are surprisingly much larger than the area of contact. After each single contact made with the metal tip on the insulator charge was transferred, the sign of which was arbitrary. It is argued that charge already flows and spreads into the insulator at the time of metal-insulator contact.
    Physical review. B, Condensed matter 03/1992; 45(7):3861-3864. · 3.77 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We present a novel approach to the detection of weak magnetic fields that takes advantage of recently developed techniques for the coherent control of solid-state electron spin quantum bits. Specifically, we investigate a magnetic sensor based on Nitrogen-Vacancy centers in room-temperature diamond. We discuss two important applications of this technique: a nanoscale magnetometer that could potentially detect precession of single nuclear spins and an optical magnetic field imager combining spatial resolution ranging from micrometers to millimeters with a sensitivity approaching few femtotesla/Hz$^{1/2}$. Comment: 29 pages, 4 figures
    Nature Physics 05/2008; · 19.35 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We have studied the Stark effect involving the spin transition in the 3A ground state of the N-V defect center in type Ib diamond, using techniques for optical detection of spin echoes. Electric-field-induced modulations of the Hahn-echo decays are reported. The results are characteristic of a linear Stark effect, which proves that the defect lacks inversion symmetry. The spin-Hamiltonian parameters characterizing the linear Stark effect of the N-V center triplet state are R3D=0.35±0.02 Hz cm/V and R2E=17±2.5 Hz cm/V.
    Chemical Physics Letters 01/1990; 168:529-532. · 2.15 Impact Factor

Full-text (2 Sources)

View
23 Downloads
Available from
May 30, 2014