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16 papers
Single-Spin Nitrogen-Vacancy Hybrid Magnetometer with Enhanced Static Field Sensitivity
Vinaya K. Kavatamane, Dewen Duan, Hadi Zadeh-Haghighi +2
Precision sensing and imaging of weak static magnetic fields are crucial for a variety of emerging nanoscale applications. While nitrogen-vacancy (NV) centers in diamond provide ex…
Magnetic sensing at zero field with a single nitrogen-vacancy center
Till Lenz, Arne Wickenbrock, Fedor Jelezko +2
Single nitrogen-vacancy (NV) centers are widely used as nanoscale sensors for magnetic and electric fields, strain and temperature. Nanoscale magnetometry using NV centers allows f…
Tapered ultra-high Numerical Aperture optical fiber tip for Nitrogen Vacancy ensembles based endoscope in a fluidic environment
Dewen Duan, Vinaya Kumar Kavatamane, Sri Ranjini Arumugam +3
Fixing a diamond containing a high density of Nitrogen-Vacancy (NV) center ensembles on the apex of a multimode optical fiber (MMF) extends the applications of NV-based endoscope s…
Efficient nitrogen-vacancy centers' fluorescence excitation and collection from micrometer-sized diamond by a tapered optical fiber
Dewen Duan, Guanxiang Du, Vinaya Kumar Kavatamane +4
Efficiently excite nitrogen-vacancy (NV) centers in diamond and collect their fluorescence significantly benefit the fiber-optic-based NV sensors. Here, using a tapered optical fib…
Enhancing fluorescence excitation and collection from the nitrogen-vacancy center in diamond through a micro-concave mirror
Dewen Duan, Vinaya Kumar Kavatamane, Sri Ranjini Arumugam +7
We experimentally demonstrate a simple and robust optical fibers based method to achieve simultaneously efficient excitation and fluorescence collection from Nitrogen-Vacancy (NV)…
Dynamical sensitivity control of a single-spin quantum sensor
Andrii Lazariev, Silvia Arroyo-Camejo, Ganesh Rahane +2
The Nitrogen-Vacancy (NV) defect in diamond is a unique quantum system that offers precision sensing of nanoscale physical quantities beyond the current state-of-the-art. Here we p…