A5031130325- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Diamond and Carbon-based Materials Research
- Advanced NMR Techniques and Applications
- Dark Matter and Cosmic Phenomena
- High-pressure geophysics and materials
- Advanced MRI Techniques and Applications
- Advanced Frequency and Time Standards
- Atomic and Molecular Physics
- Quantum, superfluid, helium dynamics
- Solid-state spectroscopy and crystallography
- Advanced Fiber Laser Technologies
- Mechanical and Optical Resonators
- Force Microscopy Techniques and Applications
- NMR spectroscopy and applications
- Electron Spin Resonance Studies
- Geophysics and Sensor Technology
- Magnetic Field Sensors Techniques
- Molecular spectroscopy and chirality
- Nuclear physics research studies
- Particle physics theoretical and experimental studies
- Radioactive Decay and Measurement Techniques
- Electronic and Structural Properties of Oxides
- Advanced Chemical Physics Studies
University of California, Berkeley
2016-2025
Johannes Gutenberg University Mainz
2016-2025
Helmholtz Institute Mainz
2016-2025
GSI Helmholtz Centre for Heavy Ion Research
2019-2025
University of Applied Sciences Mainz
2021-2024
Czech Academy of Sciences, Institute of Physics
2024
Boston University
2023
California State University, East Bay
2009-2023
Lawrence Berkeley National Laboratory
2012-2022
University of Delaware
2018-2022
Advances in atomic physics, such as cooling and trapping of atoms molecules developments frequency metrology, have added orders magnitude to the precision atom-based clocks sensors. Applications extend beyond physics this article reviews using these new techniques address important challenges look for variations fundamental constants, search interactions standard model particle test principles general relativity.
The authors review the history, current status, physical mechanisms, experimental methods, and applications of nonlinear magneto-optical effects in atomic vapors. They begin by describing pioneering work Macaluso Corbino over a century ago on linear (in which properties medium do not depend light power) vicinity resonances. These are then contrasted with various phenomena that have been studied both theoretically experimentally since late 1960s. In recent years, field magneto-optics has...
The dynamics of resonant light propagation in rubidium vapor a cell with antirelaxation wall coating are investigated. We change the polarization input and measure time dependence after cell. observed shown to be analogous those electromagnetically induced transparency. Spectral pulse delays is found similar that nonlinear magneto-optic rotation. Delays up $\ensuremath{\approx}13\mathrm{ms}$ observed, corresponding $8\mathrm{m}/\mathrm{s}$ group velocity. Fields few microgauss used control
The temperature dependence of the magnetic-resonance spectra nitrogen-vacancy (${\mathrm{NV}}^{\ensuremath{-}}$) ensembles in range 280--330 K was studied. Four samples prepared under different conditions were analyzed with ${\mathrm{NV}}^{\ensuremath{-}}$ concentrations ranging from 10 ppb to 15 ppm. For all samples, axial zero-field splitting (ZFS) parameter $D$ found vary significantly temperature, $T$, as $dD/dT=\ensuremath{-}74.2(7)\text{ }\text{ }\mathrm{kHz}/\mathrm{K}$. transverse...
Nitrogen-vacancy (NV) centers in millimeter-scale diamond samples were produced by irradiation and subsequent annealing under varied conditions. The optical spin-relaxation properties of these characterized using confocal microscopy, visible infrared absorption, optically detected magnetic resonance. sample with the highest ${\text{NV}}^{\ensuremath{-}}$ concentration, approximately 16 ppm $(2.8\ifmmode\times\else\texttimes\fi{}{10}^{18}\text{ }{\text{cm}}^{\ensuremath{-}3})$, was prepared...
We propose an experiment to search for QCD axion and axionlike-particle dark matter. Nuclei that are interacting with the background matter acquire time-varying CP-odd nuclear moments such as electric dipole moment. In analogy magnetic resonance, these cause precession of spins in a material sample presence field. Precision magnetometry can be used precession. An initial phase this could cover many orders magnitude parameter space beyond current astrophysical laboratory limits. And...
We present an experimental study of the longitudinal electron-spin relaxation time (${T}_{1}$) negatively charged nitrogen-vacancy (NV) ensembles in diamond. ${T}_{1}$ was studied as a function temperature from 5 to 475 K and magnetic field 0 630 G for several samples with various NV nitrogen concentrations. Our studies reveal three processes responsible relaxation. Above room temperature, two-phonon Raman process dominates; below we observe Orbach-type activation energy 73(4) meV, which...
We describe a Cs atomic magnetometer operating in the spin-exchange-relaxation-free (SERF) regime. With vapor cell temperature of $103\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ we achieve intrinsic magnetic resonance widths $\ensuremath{\Delta}B=17\text{ }\ensuremath{\mu}\text{G}$ corresponding to an electron spin-relaxation rate $300\text{ }{\text{s}}^{\ensuremath{-}1}$ when spin-exchange is ${\ensuremath{\Gamma}}_{\text{SE}}=14\text{ }000\text{ }{\text{s}}^{\ensuremath{-}1}$....
We demonstrate lifetimes of atomic populations and coherences in excess 60 seconds alkali vapor cells with inner walls coated an alkene material. This represents two orders magnitude improvement over the best paraffin coatings. Such anti-relaxation properties will likely lead to substantial improvements clocks, magnetometers, quantum memory, enable sensitive studies collisional effects precision measurements fundamental symmetries.
We report new limits on ultralight scalar dark matter (DM) with dilaton-like couplings to photons that can induce oscillations in the fine-structure constant alpha. Atomic dysprosium exhibits an electronic structure two nearly degenerate levels whose energy splitting is sensitive changes Spectroscopy data for isotopes of over a two-year span analyzed coherent angular frequencies below 1 rad/s. No signal consistent DM coupling identified, leading constraints photon wide mass range. Under...
Abstract The cosmological relaxion can address the hierarchy problem, while its coherent oscillations constitute dark matter in present universe. We consider possibility that forms gravitationally bound objects we denote as stars. density of these stars would be higher than local density, resulting enhanced signals table-top detectors, among others. Furthermore, raise may trapped by an external gravitational potential, such Earth or Sun. This leads to formation halos even greater density....
Numerous theories extending beyond the standard model of particle physics predict existence bosons that could constitute dark matter (DM) permeating universe. In halo (SHM) galactic velocity distribution bosonic DM field defines a characteristic coherence time $\tau_c$. Until recently, laboratory experiments searching for fields have been in regime where measurement $T$ significantly exceeds $\tau_c$, so null results interpreted as constraints on coupling to particles with amplitude $\Phi_0$...
Abstract Molecules containing short-lived, radioactive nuclei are uniquely positioned to enable a wide range of scientific discoveries in the areas fundamental symmetries, astrophysics, nuclear structure, and chemistry. Recent advances ability create, cool, control complex molecules down quantum level, along with recent upcoming species production at several facilities around world, create compelling opportunity coordinate combine these efforts bring precision measurement extreme nuclei. In...
Application of nonlinear magneto-optical (Faraday) rotation to magnetometry is investigated. Our experimental setup consists a modulation polarimeter that measures the polarization plane laser beam resonant with transitions in Rb. Rb vapor contained an evacuated cell antirelaxation coating enables atomic ground-state survive many thousand wall collisions. This leads ultranarrow features $(\ensuremath{\sim}{10}^{\ensuremath{-}6} \mathrm{G})$ magnetic-field dependence optical rotation. The...
Several dispersionlike features in the magnetic field dependence of nonlinear magneto-optic effect were observed an experiment performed on rubidium atoms contained a vapor cell with antirelaxation coating. The narrowest feature has effective resonance width $\ensuremath{\gamma}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}g\ensuremath{\mu}\ensuremath{\Delta}{B}_{z}\ensuremath{\approx}2\ensuremath{\pi}\ifmmode\times\else\texttimes\fi{}1.3\mathrm{Hz}$, where...
We report measurements of the optical properties 1042 nm transition negatively charged nitrogen-vacancy (NV) centers in type-1b diamond. The results indicate that upper level this couples to ${m}_{s}=\ifmmode\pm\else\textpm\fi{}1$ sublevels $^{3}E$ excited state and is short lived with a lifetime $\ensuremath{\lesssim}1\text{ }\text{ns}$. lower shown have temperature-dependent 462(10) ns at 4.4 K 219(3) 295 K. light-polarization dependence absorption confirms between orbitals ${A}_{1}$ $E$...
Significant attention has been recently focused on the realization of high precision nanothermometry using spin-resonance temperature shift negatively charged nitrogen-vacancy (${\mathrm{NV}}^{\ensuremath{-}}$) center in diamond. However, precise physical origins is yet to be understood. Here, shifts center's optical and spin resonances are observed a model developed that identifies origin each combination thermal expansion electron-phonon interactions. Our results provide insight into...
We report an approach for the detection of magnetic resonance imaging without superconducting magnets and cryogenics: optical atomic magnetometry. This technique possesses a high sensitivity independent strength static field, extending applicability to low fields eliminating artifacts associated with fields. By coupling remote-detection scheme, thereby improving filling factor sample, we obtained time-resolved flow images water temporal resolution 0.1 s spatial resolutions 1.6 mm...
We demonstrate an all-optical magnetometer capable of measuring the magnitude and direction a magnetic field using nonlinear magneto-optical rotation in cesium vapor. Vector capability is added by effective modulation along orthogonal axes subsequent demodulation magnetic-resonance frequency. This provided ac Stark shift induced circularly polarized laser beams. The sensor exhibits demonstrated rms noise floor $\ensuremath{\sim}65\text{ }\text{ }\mathrm{fT}/\sqrt{\mathrm{Hz}}$ measurement...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation V. M. Acosta, E. Bauch, A. Jarmola, L. J. Zipp, P. Ledbetter, D. Budker; Broadband magnetometry by infrared-absorption detection of nitrogen-vacancy ensembles in diamond. Appl. Phys. Lett. 25 October 2010; 97 (17): 174104. https://doi.org/10.1063/1.3507884 Download citation file: Ris (Zotero) Reference Manager...