Positions are available for Postdocs, Graduate Students, and Undergraduate Students interested in working in an upstart AMO research lab. Please contact Prof. Leanhardt for more information.
The 2010 Michigan Quantum Summer School, August 2 – 13, 2010.
The 2008 Michigan Quantum Summer School, June 16 – 27, 2008.
The 2011 Michigan Physics Olympiad, May 7, 2011. Physics Bowl Demonstration Quiz: slides
The 2010 Michigan Physics Olympiad, May 8, 2010. Physics Bowl Demonstration Quiz: slides
The 2009 Michigan Physics Olympiad, May 9, 2009. Physics Bowl Demonstration Quiz: slides
The 2008 Michigan Physics Olympiad, May 3, 2008. Physics Bowl Demonstration Quiz: slides
The 2010 Midwest Cold Atom Workshop, November 13, 2010.
[click image to download poster pdf] M. Stephens, J. Lee, and A.E. Leanhardt, Laser Spectroscopy of Tungsten Carbide Molecules in Search of an Electron Electric Dipole Moment, Rackham Summer Institute, University of Michigan, Aug. 9, 2011.
[click image to download poster pdf] J. Lee, J. Chen, and A.E. Leanhardt, An Electron Electric Dipole Moment Search in the 3Δ1 Ground State of Tungsten Carbide Molecules, Atomic Physics Gordon Research Conference, West Dover, VT, June 26 – July 1, 2011.
[click image to download poster pdf] S. Degenkolb, E.A. Alden, A.E. Leanhardt, and T.E. Chupp, High Precision Polarized Gas Magnetometry: Applications to Neutron EDM Measurements, Atomic Physics Gordon Research Conference, West Dover, VT, June 26 – July 1, 2011.
[click image to download poster pdf] Y.S. Rumala and A.E. Leanhardt, Multiple Beam Interference in Spiral Phase Plates, DAMOP XLII, Altanta, GA, June 13 – 17, 2011.
[click image to download movie avi] Classic physics demonstration – from the bear's perspective. (left) A bear hangs in a tree. In order to hit the bear, an arrow must be aimed well above the bear's position such that it will arc down and hit the target. (right) A bear hangs in a tree, but releases from the branch the moment the arrow is shot. In order to hit the bear, the arrow must be aimed directly at the bear's position such that it will arc down and hit the target well below its starting height. Notice the read laser sight pointed directly at the camera.
Saturday Morning Physics. Prof. Leanhardt giving his Saturday Morning Physics lecture A Brief History of Telling Time.
[click image to download poster pdf] E.A. Alden, C.M. Steiner, K.R. Moore, and A.E. Leanhardt, Tripartite Entanglement in Two-Photon Cascades, Midwest Cold Atom Workshop, University of Michigan, Nov. 13, 2010.
[click image to download poster pdf] J. Lee, J. Chen, and A.E. Leanhardt, An Electron Electric Dipole Moment Search in the X3Δ1 Ground State of Tungsten Carbide Molecules, Midwest Cold Atom Workshop, University of Michigan, Nov. 13, 2010.
[click image to download poster pdf] K.R. Moore, E.A. Alden, and A.E. Leanhardt, Developing an Optical Atomic Clock with a Neutral Mercury Vapor, Midwest Cold Atom Workshop, University of Michigan, Nov. 13, 2010.
Concentric Electrodes. Assembly of concentric ring electrodes.
[click image to download poster pdf] K.R. Moore, E.A. Alden, and A.E. Leanhardt, Nonlinear Optics with an Atomic Ytterbium Vapor, DAMOP XLI, Rice University, May 25 – 29, 2010.
Supersonic Expansion Nozzle. Testing liquid nitrogen cooling for supersonic expansion nozzle.
Near IR Photodiode. InGaAs photodiode for detecting 1479 nm spontaneous emission on the 3D2 → 3P1 transition in atomic Yb.
[click image to download poster pdf] E.A. Alden, K.R. Moore, and A.E. Leanhardt, Photon Polarization and Photon-Atom Entanglement in Atomic Yb, Midwest Cold Atom Workshop, University of Chicago, Nov. 21, 2009.
[click image to download poster pdf] J. Lee, J. Chen, R. Paudel, P. Tarlé, R. Smith, and A.E. Leanhardt, A Supersonic Gas Jet Seeded with Tungsten Carbide Molecules, Midwest Cold Atom Workshop, University of Chicago, Nov. 21, 2009.
[click image to download poster pdf] Y.S. Rumala and A.E. Leanhardt, "Angular" Kaptiza-Dirac Scattering using Optical Vortices, Midwest Cold Atom Workshop, University of Chicago, Nov. 21, 2009.
7S3 → 7P4 Transition in W. Laser induced fluorescence spectrum of atomic tungsten isotopes [182W (I=0), 183W (I=1/2), 184W (I=0), 186W (I=0)] evaporated from a resistively heated filament. The hyperfine constant of the 7P4 excited state was estimated to be 438 MHz.
Yb Spectroscopy Chamber. Vacuum chamber for nonlinear optics experiments with an atomic beam of Yb atoms.
Axial Electric Field Electrodes. A mechanical test of electrodes to generate a uniform electric field coaxial with a tungsten carbide molecular beam.
[click image to download poster pdf] E.A. Alden, Y.S. Rumala, and A.E. Leanhardt, Atom Optics and Quantum Optics with a Ytterbium Gas, Atomic Physics Gordon Research Conference, Tilton, NH, June 28 – July 3, 2009
Optical Vortex Phase Plate. Phase plates capable of creating optical vortices with winding numbers 1 and 2 at a variety of wavelengths.
1S0 → 3D2 Two-Photon Transition in Yb. Detected 556 nm fluorescence count rate for the Yb 1S0 → 3D2 two-photon transition at 808.017 nm. The detected fluorescence comes from the decay path: 3D2 → 3P1 → 1S0.
When it rains, it pours... Emily braves the lab flood with her trusty umbrella.
Laser Induced Fluorescence Spectroscopy Setup. (top view) An atomic and/or molecular beam expands into vacuum through a conical nozzle (far right), passes through a skimmer, and enters a laser induced fluorescence spectroscopy chamber (black). The spectroscopy laser enters through the windows on top and bottom of the image and fluorescence photons are imaged below the setup onto a photomultiplier tube (PMT).
[click image to download poster pdf] J. Lee and A.E. Leanhardt, A Supersonic Gas Jet Seeded with Tungsten Carbide Molecules, Midwest Cold Atom Workshop, Argonne National Laboratory, Nov. 15, 2008.
[click image to download poster pdf] Y.S. Rumala, E.A. Alden, and A.E. Leanhardt, Construction of an Ytterbium Laser Cooling and Trapping Apparatus, Midwest Cold Atom Workshop, Argonne National Laboratory, Nov. 15, 2008.
Atomic Tungsten Absorption Spectroscopy. Absorption spectroscopy on the 7S3 → 7P4 transition of tungsten atoms near a resistively heated filament at ~3000 K.
WC Spectroscopy Laser. Frequency-doubled Ti:Saph setup (867 nm → 433.5 nm) for tungsten carbide molecular spectrscopy.
Red ↔ Green LEDs. Fundamental theorem of electronics: all circuits will expand to fill their proto boards.
DC Electric Quadrupole Waveguide. Quadrupole electrodes designed to guide ground state tungsten carbide (WC) molecules. For scale, the electrodes are mounted on an 8" CF flange.
Yb atomic beam. Ytterbium beamline with Zeeman slower and MOT coils installed showing (right) 399 nm fluorescence from the Yb atomic beam arriving in the cooling and trapping region.
[click image to download poster pdf] J. Lee, R. Paudel, and A.E. Leanhardt, A Supersonic Gas Jet Seeded with Tungsten Carbide Molecules, ICAP XXI, University of Connecticut, July 27 – Aug. 1, 2008.
Spin-flip Zeeman slower. Magnetic field profile testing of a spin-flip Zeeman slower for Yb atoms. Yb atoms will travel from right to left through the coils against a counter-propagating 399 nm laser beam.
W+CH4 → WC + 2H2. Quadrupole mass spectrum of tungsten atoms (mass 182-186) and tungsten carbide molecules (mass 194-198) formed by evaporating a tungsten filament in the presence of methane gas.
[click image to download poster pdf] J. Lee, R. Paudel, and A.E. Leanhardt, A Supersonic Gas Jet Seeded with Tungsten Atoms, Michigan Quantum Summer School, University of Michigan, June 16 – 27, 2008.
[click image to download poster pdf] Y.S. Rumala, C. Li, and A.E. Leanhardt, Construction of a Yb Laser Cooling and Trapping Apparatus, Michigan Quantum Summer School, University of Michigan, June 16 – 27, 2008.
Ar + W supersonic beam. A tungsten filament is resistively heated to over 3000 K in the presence of an argon buffer gas. The resulting W vapor is entrained in a supersonic jet formed by allowing the argon gas to flow through a nozzle into vacuum. For beam diagnostics, the resulting Ar + W supersonic jet sputters onto copper foils (shown above) placed at various distances downstream.
Yb atomic beam. Ytterbium metal is vaporized in vacuum by running current through a tantalum heating tube (electrical feedthru shown at far left). The atoms are probed with resonant laser light at 399 nm and absorption signals are shown in the inset for Yb atoms in the oven chamber (blue) and trapping chamber (yellow).
