Results 61 to 70 of about 15,911 (209)

Toward improved loading, cooling, and trapping of molecules in magneto-optical traps

New Journal of Physics, 2023
Recent experiments have demonstrated direct cooling and trapping of diatomic and triatomic molecules in magneto-optical traps (MOTs). However, even the best molecular MOTs to date still have density 10 ^−5 times smaller than in typical atomic MOTs.
T K Langin, D DeMille
doaj   +1 more source

Wet Ball Milling Synthesis of Iron Oxide Nanoparticles for High‐Efficiency, Controllable Magnetic Hyperthermia in Ovarian Cancer

Advanced Materials Technologies, EarlyView.
A wet ball‐milling method is presented to synthesize iron magnetic nanoparticles and evaluate their magnetic hyperthermia performance. Optimized particles (∼270 nm, Ms ∼114 emu/g) achieve ∼50°C heating under clinically safe alternating magnetic fields, while pulsed‐field operation enables controlled temperature regulation (∼30°C).
Shahriar Mostufa, Bahareh Rezaei, Md Shahriar, Karla Mercedes Paz González, Anil Kumar, Changxue Xu, Yun Suk Eo, Ioannis H. Karampelas, Jenifer Gómez‐Pastora, Rui He, Kai Wu   +10 more
wiley   +1 more source

Narrow-line magneto-optical cooling and trapping of strongly magnetic atoms [PDF]

, 2008
Laser cooling on weak transitions is a useful technique for reaching ultracold temperatures in atoms with multiple valence electrons. However, for strongly magnetic atoms a conventional narrow-line magneto-optical trap (MOT) is destabilized by ...
Andrew J. Berglund, H. Wallis, H. J. Metcalf, Jabez J. McClelland, James L. Hanssen, P. D. Lett, R. W. Fox, Y. Castin   +7 more
core   +1 more source

Patterned Rydberg excitation and ionization with a spatial light modulator

New Journal of Physics, 2015
We demonstrate the ability to excite atoms at well-defined, programmable locations in a magneto-optical trap, either to the continuum (ionization), or to a Rydberg state.
R M W van Bijnen, C Ravensbergen, D J Bakker, G J Dijk, S J J M F Kokkelmans, E J D Vredenbregt   +5 more
doaj   +1 more source

Steady-state magneto-optical trap of fermionic strontium on a narrow-line transition

Physical Review Research, 2021
A steady-state magneto-optical trap (MOT) of fermionic strontium atoms operating on the 7.5-kHz-wide ^{1}S_{0}-^{3}P_{1} transition is demonstrated. This MOT contains 8.4×10^{7}atoms, a loading rate of 1.3×10^{7}atoms/s, and an average temperature of ...
Rodrigo González Escudero, Chun-Chia Chen (陳俊嘉), Shayne Bennetts, Benjamin Pasquiou, Florian Schreck   +4 more
doaj   +1 more source

Magnetic Droplet Manipulation on Open Surfaces

Advanced Materials Technologies, EarlyView.
Recent advances in the manipulation of magnetic droplets demonstrate various manipulations on open surfaces, including transport, splitting, merging, and force‐controlled motion, enabled by magnetic particles and external fields. ABSTRACT Manipulation of liquids on a smaller scale enables applications in various fields, particularly diagnostics and ...
Robab Jahangir, Vahid Nasirimarekani
wiley   +1 more source

Absorption-induced trapping in an anisotropic magneto-optical trap

Optics Express, 2007
We report on a simple anisotropic magneto-optical trap for neutral atoms that produces a large sample of cold atoms confined in a cylindrically-shaped volume with a high aspect ratio (100:1). Due to the large number of trapped atoms, the laser beams that propagate along the optically thick axis of the trap to cool the atoms are substantially attenuated.
Greenberg, Joel A., Oria, M., Dawes, Andrew M.C., Gauthier, Daniel J.   +3 more
openaire   +2 more sources

Broadband Directional Thermal Radiation with Asymmetric Femtosecond Laser‐Processed Surfaces

Advanced Optical Materials, EarlyView.
Femtosecond laser processing is used to scalably create self‐organized angled microstructures which exhibit highly directional emissivity that occurs for all polarizations. Laser parameters are tuned to alter the surface features, control the direction of emission, and enhance the directional emissivity. Electromagnetic modeling is performed to analyze
Andrew Butler, Andrew Reicks, Jack Schulz, Patrick Hayden, Alireza Kalantari Dehaghi, Kira Marr, Linxiao Zhu, Christos Argyropoulos, Craig Zuhlke   +8 more
wiley   +1 more source

1D Magneto-Optical Trap of Polyatomic Molecules

Physical Review Letters, 2020
We demonstrate a 1D magneto-optical trap of the polar free radical calcium monohydroxide (CaOH). A quasi-closed cycling transition is established to scatter $\sim 10^3$ photons per molecule, predominantly limited by interaction time. This enables radiative laser cooling of CaOH while compressing the molecular beam, leading to a significant increase in ...
Louis Baum, Nathaniel B. Vilas, Christian Hallas, Benjamin L. Augenbraun, Shivam Raval, Debayan Mitra, John M. Doyle   +6 more
openaire   +4 more sources

A compact high-flux grating chip cold atom source

New Journal of Physics
Diffraction gratings have simplified the optical implementation of magneto-optical traps (MOTs) to require only a single input beam, however reaching high atom number and fast loading has proven to be a challenge.
Hendrik Heine, Aidan S Arnold, Melanie S Le Gonidec, Paul F Griffin, Erling Riis, Waldemar Herr, Ernst M Rasel   +6 more
doaj   +1 more source