136 citations · 616 across the 25 of their papers we have counts for
25 papers
NaBiF: Er, Yb upconversion particle as a multi-functional bio-marker
Atanu Ghosh, Krishna Kumari Swain, Agniva Das +6
Lanthanide-doped upconversion particles (UCPs) have revolutionized optical bioimaging platforms because of their excellent photostability, non-toxicity, and utilization of near-inf…
Spin bath mediated long-lived coherent oscillations of NV centers in diamond
Akshat Rana, Pooja Lamba, Basanta Mistri +3
Decoherence is the biggest bottleneck in all quantum technologies. For nitrogen-vacancy (NV) centers in diamond, the loss of coherence is caused by the electron and nuclear spin ba…
Phonon-bottlenecked spin relaxation of Er:CaWO at milliKelvin temperatures
S. Rajendran, B. Mistri, P. K. Sharma +5
We study spin-lattice relaxation times of electron spins in Er:CaWO at millikelvin temperature, detected via their coupling to a low-mode volume superconducting resonato…
Clock-transition-enabled long electron spin coherence of telecom emitters in CeO
Basanta Mistri, Vishal Ranjan, Siddharth Dhomkar
Rare-earth-ion-doped crystals has emerged as a promising platform for quantum technologies, owing to their narrow telecom-band optical emission, long spin memory, and compatibility…
Stabilisation of NV centres in diamond nanopillars at low temperature
Ravi Kumar, Saksham Mahajan, Felix Donaldson +8
Degradation of near surface nitrogen vacancy (NV) centers in diamond under optical illumination has restricted their deployment in applications such as scanning NV magnetomety, par…
Demonstrating Noise-adapted Quantum Error Correction With Break-Even Performance
Vismay Joshi, Anubhab Rudra, Sourav Dutta +2
The promise of quantum computing is closer to reality today than ever before, thanks to rapid progress in the development of quantum hardware. Even as qubit lifetimes and gate fide…
Impact of irradiation conditions on the magnetic field sensitivity of spin defects in hBN nano flakes
Saksham Mahajan, Ravi Kumar, Aferdita Xhameni +8
We study centres generated by helium focused ion beam (FIB) irradiation in thin (70 nm) hBN nanoflakes, in order to investigate the effect of implantation…
Imaging of microwave magnetic field orientation using continuous-wave experiments on nitrogen-vacancy centers in diamond
Akshat Rana, Pooja Lamba, Atanu Ghosh +2
Imaging of microwave magnetic fields with nano-scale resolution has interesting applications. Specifically, detecting the orientation of the microwave fields is useful in condensed…
Inferring activity from the flow field around active colloidal particles using deep learning
Aditya Mohapatra, Aditya Kumar, Mayurakshi Deb +2
Active colloidal particles create flow around them due to non-equilibrium process on their surfaces. In this paper, we infer the activity of such colloidal particles from the flow…
Identifying optimal magnetic field configurations for decoherence mitigation of boron vacancies in hexagonal boron nitride
Basanta Mistri, Saksham Mahajan, Felix Donaldson +2
The negatively charged boron vacancy center in 2D hexagonal boron nitride has emerged as a promising quantum sensor. However, its sensitivity is constrained due to ubiquitous nucle…
Expedited Noise Spectroscopy of Transmon Qubits
Bhavesh Gupta, Vismay Joshi, Udit Kandpal +3
There has been tremendous progress in the physical realization of quantum computing hardware in recent times, bringing us closer than ever before to realizing the promise of quantu…
Donor-bound-exciton strain microscopy in silicon devices
Pierandrea Conti, Siddharth Dhomkar, Philipp Ross +2
We explore the effects of stress on silicon donor bound exciton () transitions in bulk silicon and in microfabricated silicon devices. We first study …
Stability of near surface nitrogen vacancy centers using dielectric surface passivation
Ravi Kumar, Saksham Mahajan, Felix Donaldson +8
We study the photo-physical stability of ensemble near-surface nitrogen vacancy (NV) centers in diamond under vacuum and air. The optically detected magnetic resonance contrast of…
Vector detection of AC magnetic fields by Nitrogen-Vacancy centers of single orientation in diamond
Pooja Lamba, Akshat Rana, Sougata Halder +3
Nitrogen-Vacancy (NV) centers in diamond have useful properties for detecting both AC and DC magnetic fields with high sensitivity at nano-scale resolution. Vector detection of AC…
Toward deep-learning-assisted spectrally-resolved imaging of magnetic noise
Fernando Meneses, David F. Wise, Daniela Pagliero +3
Recent progress in the application of color centers to nanoscale spin sensing makes the combined use of noise spectroscopy and scanning probe imaging an attractive route for the ch…
Plasmonics enabled atomically thin linearly polarized emitter at room temperature
Bidisha Roy, Maex Blauth, Siddharth Dhomkar +3
Two-dimensional transition metal di-chalcogenide semiconductors provide unique possibilities to investigate strongly confined excitonic physics and a plasmonic platform integrable…
Using deep learning to understand and mitigate the qubit noise environment
David F. Wise, John J. L. Morton, Siddharth Dhomkar
Understanding the spectrum of noise acting on a qubit can yield valuable information about its environment, and crucially underpins the optimization of dynamical decoupling protoco…
Dynamics of frequency-swept nuclear spin optical pumping in powdered diamond at low magnetic fields
Pablo R. Zangara, Siddharth Dhomkar, Ashok Ajoy +7
A broad effort is underway to improve the sensitivity of nuclear magnetic resonance through the use of dynamic nuclear polarization. Nitrogen-vacancy (NV) centers in diamond offer…
Spin readout via spin-to-charge conversion in bulk diamond nitrogen-vacancy ensembles
Harishankar Jayakumar, Siddharth Dhomkar, Jacob Henshaw +1
We demonstrate optical readout of ensembles of nitrogen-vacancy(NV) center spins in a bulk diamond sample via spin-to-charge conversion. A high power 594 nm laser is utilized to se…
Charge dynamics in near-surface, variable-density ensembles of nitrogen-vacancy centers in diamond
Siddharth Dhomkar, Harishankar Jayakumar, Pablo R. Zangara +1
Although the spin properties of superficial shallow nitrogen-vacancy (NV) centers have been the subject of extensive scrutiny, considerably less attention has been devoted to study…
Orientation independent room-temperature optical 13C hyperpolarization in powdered diamond
A. Ajoy, K. Liu, R. Nazaryan +15
Dynamic nuclear polarization via contact with electronic spins has emerged as an attractive route to enhance the sensitivity of nuclear magnetic resonance (NMR) beyond the traditio…
On-Demand Generation of Neutral and Negatively-Charged Silicon-Vacancy Centers in Diamond
Siddharth Dhomkar, Pablo R. Zangara, Jacob Henshaw +1
Point defects in wide-bandgap semiconductors are emerging as versatile resources for nanoscale sensing and quantum information science but our understanding of the photo-ionization…
Multi-spin-assisted optical pumping of bulk 13C nuclear spin polarization in diamond
Daniela Pagliero, K. R. Koteswara Rao, Pablo R. Zangara +11
One of the most remarkable properties of the nitrogen-vacancy (NV) center in diamond is that optical illumination initializes its electronic spin almost completely, a feature that…
Long-term data storage in diamond
Siddharth Dhomkar, Jacob Henshaw, Harishankar Jayakumar +1
The negatively-charged nitrogen-vacancy (NV-) center in diamond is the focus of widespread attention for applications ranging from quantum information processing to nanoscale metro…