256 citations · 1.1k across the 23 of their papers we have counts for
27 papers
Chiral sensing with achiral anisotropic metasurfaces
Sotiris Droulias, Lykourgos Bougas
Recently, we proposed a metasurface design for chiral sensing that (i) results in enhanced chiroptical signals by more than two orders of magnitude for ultrathin, subwavelength, ch…
Rapid parameter estimation of discrete decaying signals using autoencoder networks
Jim C. Visschers, Dmitry Budker, Lykourgos Bougas
In this work we demonstrate the use of neural networks for rapid extraction of signal parameters of discretely sampled signals. In particular, we use dense autoencoder networks to…
Rapid parameter determination of discrete damped sinusoidal oscillations
Jim C. Visschers, Emma Wilson, Thomas Conneely +2
We present different computational approaches for the rapid extraction of the signal parameters of discretely sampled damped sinusoidal signals. We compare time- and frequency-doma…
Probing topological spin structures using light-polarization and magnetic microscopy
Till Lenz, Georgios Chatzidrosos, Zhiyuan Wang +12
We present an imaging modality that enables detection of magnetic moments and their resulting stray magnetic fields. We use wide-field magnetic imaging that employs a diamond-based…
Rapid online solid-state battery diagnostics with optically pumped magnetometers
Yinan Hu, Geoffrey Z. Iwata, Lykourgos Bougas +7
Solid state battery technology is motivated by the desire to deliver flexible power storage in a safe and efficient manner. The increasingly widespread use of batteries from mass-p…
Action potentials induce biomagnetic fields in Venus flytrap plants
Anne Fabricant, Geoffrey Z. Iwata, Sönke Scherzer +6
Upon stimulation, plants elicit electrical signals that can travel within a cellular network analogous to the animal nervous system. It is well-known that in the human brain, volta…
Photoluminescence at the ground state level anticrossing of the nitrogen-vacancy center in diamond
Viktor Ivády, Huijie Zheng, Arne Wickenbrock +9
The nitrogen-vacancy center (NV center) in diamond at magnetic fields corresponding to the ground state level anticrossing (GSLAC) region gives rise to rich photoluminescence (PL)…
Continuous-Wave Cavity Ring-Down Polarimetry
Jim C. Visschers, Oleg Tretiak, Dmitry Budker +1
We present a new cavity-based polarimetric scheme for highly sensitive and time-resolved measurements of birefringence and dichroism, linear and circular, that employs rapidly-puls…
Absolute chiral sensing in dielectric metasurfaces with signal reversals
Sotiris Droulias, Lykourgos Bougas
Sensing molecular chirality at the nanoscale has been a long-standing challenge due to the inherently weak nature of chiroptical signals, and nanophotonic approaches have proven fr…
Noncovalent force spectroscopy using wide-field optical and diamond-based magnetic imaging
Sean Lourette, Lykourgos Bougas, Metin Kayci +2
A realization of the force-induced remnant magnetization spectroscopy (FIRMS) technique of specific biomolecular binding is presented where detection is accomplished with wide-fiel…
,-odd Faraday rotation on atoms and molecules in intra-cavity absorption spectroscopy as an alternative way to search for the ,-odd effects in nature
D. V. Chubukov, L. V. Skripnikov, L. Bougas +1
Present limit on the electron electric dipole moment (EDM) is based on the electron spin precession measurement. We propose an alternative approach - observation of the $\mathca…
A surface plasmon platform for angle-resolved chiral sensing
Sotiris Droulias, Lykourgos Bougas
Chiral sensitive techniques have been used to probe the fundamental symmetries of the universe, study biomolecular structures, and even develop safe drugs. As chiral signals are in…
Variable single-axis magnetic-field generator using permanent magnets
Oleg Tretiak, Peter Blümler, Lykourgos Bougas
We present a design for producing precisely adjustable and alternating single-axis magnetic fields based on nested Halbach dipole pairs consisting of permanent magnets only. Our de…
Infrared laser magnetometry with a NV doped diamond intracavity etalon
Yannick Dumeige, Jean-François Roch, Fabien Bretenaker +8
We propose an hybrid laser system consisting of a semiconductor external cavity laser associated to an intra-cavity diamond etalon doped with nitrogen-vacancy color centers. We con…
Eddy-current imaging with nitrogen-vacancy centers in diamond
Georgios Chatzidrosos, Arne Wickenbrock, Lykourgos Bougas +4
We demonstrate microwave-free eddy-current imaging using nitrogen-vacancy centers in diamond. By detecting the eddy-current induced magnetic field of conductive samples, we can dis…
Diamond magnetic microscopy of malarial hemozoin nanocrystals
Ilja Fescenko, Abdelghani Laraoui, Janis Smits +6
Magnetic microscopy of malarial hemozoin nanocrystals was performed using optically detected magnetic resonance imaging of near-surface diamond nitrogen-vacancy centers. Hemozoin c…
Sawtooth wave adiabatic passage slowing of dysprosium
Niels Petersen, Florian Mühlbauer, Lykourgos Bougas +3
We report on sawtooth wave adiabatic passage (SWAP) slowing of bosonic and fermionic dysprosium isotopes by using a 136 kHz wide transition at 626 nm. A beam of precooled atoms is…
Widefield imaging of superconductor vortices with electron spins in diamond
Yechezkel Schlussel, Till Lenz, Dominik Rohner +11
Understanding the mechanisms behind high- Type-II superconductors (SC) is still an open task in condensed matter physics. One way to gain further insight into the microscopi…
Nondestructive in-line sub-picomolar detection of magnetic nanoparticles in flowing complex fluids
Lykourgos Bougas, Lukas D. Langenegger, Carlos A. Mora +5
Over the last decades, the use of magnetic nanoparticles in research and commercial applications has increased dramatically. However, direct detection of trace quantities remains a…
Measuring molecular parity nonconservation using nuclear magnetic resonance spectroscopy
James Eills, John W. Blanchard, Lykourgos Bougas +3
The weak interaction does not conserve parity and therefore induces energy shifts in chiral enantiomers that should in principle be detectable in molecular spectra. Unfortunately,…
Miniature cavity-enhanced diamond magnetometer
Georgios Chatzidrosos, Arne Wickenbrock, Lykourgos Bougas +5
We present a highly sensitive miniaturized cavity-enhanced room-temperature magnetic-field sensor based on nitrogen-vacancy (NV) centers in diamond. The magnetic resonance signal i…
Level anti-crossing magnetometry with color centers in diamond
Huijie Zheng, Georgios Chatzidrosos, Arne Wickenbrock +7
Recent developments in magnetic field sensing with negatively charged nitrogen-vacancy centers (NV) in diamond employ magnetic-field (MF) dependent features in the photoluminescenc…
Highly spin-polarized deuterium atoms from the UV dissociation of Deuterium Iodide
D. Sofikitis, P. Glodic, G. Koumarianou +5
We report the production of highly spin-polarized Deuterium atoms via photodissociation of deuterium iodide at 270 nm. The velocity distribution of both the deuterium and iodine ph…
Microwave-free magnetometry with nitrogen-vacancy centers in diamond
Arne Wickenbrock, Huijie Zheng, Lykourgos Bougas +5
We use magnetic-field-dependent features in the photoluminescence of negatively charged nitrogen-vacancy centers to measure magnetic fields without the use of microwaves. In partic…