Featured Publications
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High-sensitivity multichannel zero-to-ultralow field NMR with atomic magnetometer arrays
B. Andrews, et al. PNAS Nexus 4, 6 (2025)
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Enhanced Reactivity at the Oil-Water Interface Accelerates the Synthesis of Zymonic Acid in Microemulsions
B. Wallace, et al. Chem. Sci. (in press) (2025).
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Experimental observation of a time rondeau crystal: Temporal Disorder in Spatiotemporal Order
L. Moon, et al. Nature Physics (in press) (2025)
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Nanoscale engineering and dynamical stabilization of mesoscopic spin textures
K. Harkins, et al. Science Advances 11, 13, eadn9021 (2025)
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Room-temperature quantum sensing with photoexcited triplet electrons in organic crystals
H. Singh, et al. Phys. Rev. Research 7, 013192 (2025)
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Complex 3-dimensional microscale structures for quantum sensing applications
B. Blankenship, et al. Nano. Lett. 23, 9272 (2023)
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High-Field Magnetometry with Hyperpolarized Nuclear Spins
O, Sahin, et al. Nature Comm 13, 5486 (2022)
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Electron induced nanoscale nuclear spin relaxation probed by hyperpolarization injection
W. Beatrez, et al. Phys. Rev. Lett. 131, 010802 (2023)
Our Work Has Been Featured In
28. Room temperature “Optical Nanodiamond Hyperpolarizer”: physics, design and operation
A. Ajoy*, R. Nazaryan, E. Druga, K. Liu, A. Aguilar, B. Han, M. Gierth, J. T. Oon, B. Safvati, R. Tsang, J. H. Walton, D. Suter, C. A. Meriles, J. A. Reimer and A. Pines [PDF]
arXiv:1811.10218 — Rev. Sci. Instru. 91, 023106 (2020) .
Youtube video highlighting "Ultracompact Nanodiamond Hyperpolarizer".
27. Hyperpolarized relaxometry based nuclear T1 noise spectroscopy in hybrid diamond quantum register
A. Ajoy*, B. Safvati, R. Nazaryan, J. T. Oon, B. Han, P. Raghavan, R. Nirodi, A. Aguilar, K. Liu, X. Cai, X. Lv, E. Druga, C. Ramanathan, J. A. Reimer, C. A. Meriles, D. Suter, and A. Pines [PDF] [SI]
arXiv:1902.06204 — Nature Communications 10, 5160 (2019) .
26. 13C dynamic nuclear polarization in diamond via a microwave-free ‘integrated’ cross effect
J. Henshaw, D. Pagliero, P.R. Zangara, B. Franzoni, A. Ajoy, R. Acosta, J. Reimer, A. Pines, C. A. Meriles [PDF]
Proc. Natl. Acad. Sci. USA 116, 18334 (2019).
25. Cross-sensor feedback stabilization of an emulated quantum spin gyroscope
J.-C. Jaskula†, K. Saha†, A. Ajoy, D. J. Twitchen, M. Markham, and P. Cappellaro [PDF]
arXiv:1808.04494 — Phys. Rev. Applied 11, 054010 (2019)
24. Dynamic Hamiltonian engineering of 2D rectangular lattices in a one-dimensional ion chain
F. Rajabi, S. Motlakunta, C.-Y. Shih, N. Kotibhaskar, Q. Quraishi, A. Ajoy, and R. Islam [PDF]
arXiv:1808.06124 — npj Quantum Information 5, 32 (2019)
23. Two-electron-spin ratchets as a platform for microwave-free dynamic nuclear polarization of arbitrary material targets
P.R. Zangara, J. Henshaw, D. Pagliero, A. Ajoy, J. Reimer, A. Pines, C. Meriles [PDF]
arXiv:1904.08563 — Nano Letters 19, 2389 (2019)
22. Nanoscale vector DC magnetometry via ancilla assisted frequency up-conversion
Y. X. Liu†, A. Ajoy† and P. Cappellaro [PDF] [SI]
arXiv:1611.04691 — Phys. Rev. Lett. 122, 100501 (2019)
Spotlighted by MIT News
21. Wide dynamic range magnetic field cycler: Harnessing quantum control at low and high fields
YouTube video highlighting "Wide dynamic field cycling".
YouTube video highlighting "Printing coils for NMR".
A. Ajoy*, X. Lv, E. Druga, K. Liu, B. Safvati, A. Morabe, M. Fenton, R. Nazaryan, S. Patel, T. Sjolander, J. Reimer, D Sakellariou, C. Meriles and A. Pines [PDF]
arXiv:1808.06124 — Rev. Sci. Instru. 90, 013112 (2019)
20. Dynamics of frequency-swept nuclear spin optical pumping in powdered diamond at low magnetic fields
P.R. Zangara, S. Dhomkar, A. Ajoy, K. Liu, R. Nazaryan, D. Pagliero, D. Suter, J. Reimer, A. Pines, C. Meriles [PDF] [SI]
Proc. Natl. Acad. Sci., 1811994116, (2019).
19. Selective decoupling and Hamiltonian engineering in dipolar spin networks
A. Ajoy*†, U. Bissbort†, D. Poletti and P. Cappellaro [PDF] [SI]
arXiv:1710.03987 — Phys. Rev. Lett. 122, 013205 (2019)
18. Enhanced dynamic nuclear polarization via swept microwave frequency combs
Blurb here
A. Ajoy*, R. Nazaryan, K. Liu, X. Lv, B. Safvati, G. Wang, E. Druga, J. A. Reimer, D. Suter, C. Ramanathan, C. A. Meriles and A. Pines [PDF] [SI]
arXiv:1807.07664 — Proc. Natl. Acad. Sci., 1807125115, (2018).
17. Orientation independent room-temperature optical 13C hyperpolarization in powdered diamond
A. Ajoy*, K. Liu, R. Nazaryan, X. Lv, P. Zangara, B. Safvati, G. Wang, D. Arnold, G. Li, A. Lin, P. Raghavan, E. Druga, S. Dhomkar, D. Pagliero, J. Reimer, D. Suter, C. Meriles and A.Pines [PDF] [SI]
arXiv:1807.07664 — Science Advances 4, eaar5492 (2018).
Spotlighted by Berkeley News, LBNL News, MRS Bulletin, R&D Magazine, Technology Networks, Phys.org, MRC Biomedical Picture of the Day.
16. Multi-spin-assisted optical pumping of bulk 13C nuclear spin polarization in diamond
D. Pagliero, K.R. Koteswara Rao, P.R. Zangara, S. Dhomkar, H.H. Wong, A. Abril, N. Aslam, A. Parker, J. King, C.E. Avalos, A. Ajoy, J. Wrachtrup, A. Pines, C.A. Meriles [PDF]
arXiv:1711.07576 — Phys. Rev. B. 97, 024422 (2018).
Selected as an Editor's Suggestion.
15. A bright nanowire single photon source
L. Marseglia, K. Saha, A. Ajoy, T. Schroder, D. R. Englund, T. Teraji, J. Isoya, F. Jelezko, R. Walsworth, J. L. Pacheco, D. Perry, E. Bielejec and P. Cappellaro [PDF]
Optics Express 26, 80, (2018).
13. Quantum Interpolation for High Resolution Sensing
Blurb here
Spotlighted by MIT NEWS.
A. Ajoy, Y. X. Liu, K. Saha, L. Marseglia, J.-C. Jaskula, U. Bissbort and P. Cappellaro [PDF][SI]
arXiv:1604.01677 -- Proc. Natl. Acad. Sci. 114, 2149 (2017).
12. Substance from shadow: GN Ramachandran's contributions to medical imaging
Blurb Here
A. Kumar and A. Ajoy
Resonance 8, 741 (2016).
11. Atomic-scale nuclear spin imaging using quantum-assisted sensors in diamond
Spotlighted by MIT News and Chemistry World
A. Ajoy, U. Bissbort, M.D. Lukin, R.L. Walsworth and P. Cappellaro [PDF] [SI]
10. Decay of spin coherences in one-dimensional spin systems
G. Kaur, A. Ajoy and P. Cappellaro [PDF]
arXiv:1306.2620 — New J. Phys. 15, 093035 (2013).
