India unveils indigenous Quantum Diamond Microscope for advanced magnetic imaging

India has unveiled its first indigenous Quantum Diamond Microscope (QDM), a breakthrough in quantum sensing technology, for advanced magnetic field imaging.

Development Details

The QDM was developed by the P-Quest Group at IIT Bombay, led by Professor Kasturi Saha, under the National Quantum Mission (NQM) of the Department of Science and Technology (DST). It was announced at the Emerging Science Technology and Innovation Conclave (ESTIC 2025) on October 31, 2025, with Union Minister Dr. Jitendra Singh, Principal Scientific Adviser Prof. Ajay K. Sood, and DST Secretary Prof. Abhay Karandikar present.

Technology Overview

The microscope uses nitrogen-vacancy (NV) centers in diamond—atomic-scale defects that maintain quantum coherence at room temperature and sense magnetic, electric, and thermal changes via optically detected magnetic resonance (ODMR). This enables nanoscale 3D magnetic field imaging with widefield visualization, akin to optical microscopy.

Key Applications

QDM supports non-destructive testing of semiconductor chips by mapping buried current paths and multilayer structures in integrated circuits, batteries, and microelectronics. It also holds promise for neuroscience, materials research, biological imaging, and geological studies, with plans for AI/ML integration.

Significance

This innovation marks India's first patent in quantum diamond microscopy, positioning the country among global leaders in quantum technology.