Nitrogen-Vacancy (NV) Centre
Definition
A point defect in diamond where a nitrogen atom is adjacent to a lattice vacancy; the electron spin of the NV centre is sensitive to magnetic fields and can be manipulated with laser light and microwaves at room temperature, enabling nanoscale magnetometry.
- Host material
- Diamond
- Defect
- Nitrogen atom adjacent to a lattice vacancy
- Property
- Electron spin sensitive to magnetic fields
- Operating temperature
- Room temperature
- Application
- Nanoscale magnetometry
Common questions
Why is room-temperature operation significant for NV centre sensing?+
Most quantum sensing approaches need cryogenic cooling to preserve a usable signal, limiting them to laboratory settings. An NV centre's spin state stays coherent enough to read out at room temperature, making portable magnetic sensing feasible.
How mature is NV centre magnetometry for forensic casework?+
It is still an emerging technique being explored for mapping magnetic signatures in trace evidence and imaging currents or ferromagnetic particles below the resolution of conventional magnetometers, not yet routine in casework.
Related terms
- Convolutional Neural Network (CNN)
- A deep learning architecture that learns hierarchical spatial features from image data by passing the input through successive layers of learnable filters;...
- ENFSI AI Position Paper
- The 2023 European Network of Forensic Science Institutes policy document specifying that AI tools used in forensic casework must have published blind-test...
- EU AI Act
- The European Union's comprehensive AI regulation, fully effective from 2026. Classifies deep-fake generators used for impersonation as high-risk; requires that AI-generated content...
- FMR and FNMR
- False Match Rate (probability that a non-matching pair is accepted as a match) and False Non-Match Rate (probability that a genuine matching...
- Haemoglobin Species
- The forms of haemoglobin relevant to bloodstain ageing: oxyhaemoglobin (HbO2, fresh), deoxyhaemoglobin (Hb), methaemoglobin (Met-Hb), haemichrome, and haematin; each has a distinct...
- Hyperspectral Imaging
- An imaging technique that captures a full reflectance spectrum (typically hundreds of narrow wavelength bands from UV to near-IR) at every pixel...
- NAFIS
- National Automated Fingerprint Identification System: India's centralised fingerprint database operated by the NCRB, launched 2022, designed to aggregate state police and CFSL...
- OSAC
- Organization of Scientific Area Committees for Forensic Science: established by NIST and DOJ in 2014, it develops consensus forensic standards through structured...
- SQUID
- Superconducting Quantum Interference Device; an ultra-sensitive magnetometer exploiting quantum flux quantisation in a superconducting loop; requires cryogenic cooling but can detect magnetic...
- Terahertz (THz) Radiation
- Electromagnetic radiation in the frequency range approximately 0.1 to 10 THz (wavelengths 30 micrometres to 3 mm), situated between microwave and mid-infrared;...
- THz Time-Domain Spectroscopy (THz-TDS)
- A technique using ultrashort laser pulses to generate and detect broadband THz pulses; provides both amplitude and phase spectra, enabling complex refractive-index...