A Geoscience Directed Quantum Sensing Lab in EESA
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In a stable magnetic field, a single-crystal synthetic diamond is positioned at the center of a microwave antenna and beneath a fiber optics that collects the fluorescence signal at the near field. A green excitation laser is used to prepare the spin state of the NV centers prior to the next quantum sensing steps.
The quantum states of NV centers are disturbed in the presence of controlled nuclear spins of analytes in a magnetic field. The red fluorescence emissions, shown here behind a long-pass filter, contain information of the quantum spin states and hence the chemical information from the analytes.
The sample holder is supported by a 5-axis stage to provide accurate geometrical control when positioned with the diamond between the poles of a high-stability electromagnet.