Organizers: Samir Bali, Miami University of Ohio, USA, and Harold Metcalf, Stony Brook University, USA
The Laser Science Symposium on Undergraduate Research has been a feature of the annual meeting of the Division of Laser Science of the American Physical Society (APS-DLS) for twenty years, and has showcased the research of more than 500 students during that time. Students’ presentations often describe their work during the previous summer. The NSF has played a vital role by providing the research opportunities for many of the students through its REU programs, as well as by direct support of the event. The symposium has been generously supported by the DLS, OSA, NSF, SPS, and Univ. MD (JQI), along with corporate sponsors Thorlabs, Photonics Industries, and East Coast Optical Technologies.
Presider: Amy Sullivan, University of Colorado
LM4G – 1 Using photoassociation to control atom population in an optical lattice clock, Brett Merriman, Haoran Li, Jonathan Dolde, Xin Zheng, Shimon Kolkowitz, Department of Physics, University of Wisconsin – Madison, WI 53706. Atomic interactions in optical lattice clocks can hinder clock performance, but can be mitigated by deterministically load- ing at most one atom per lattice site. We analyze how to achieve a filling of zero or one atom per lattice site using the 1S0- 3P1 photoassociation transition of strontium with realistic experimental parameters. Financial support provided by Wis- consin Alumni Research Foundation, NIST, John Templeton Foundation, ARO, and Packard Foundation.
LM4G – 2 Coherent Population Trapping (CPT) Interrogation in Atomic Clocks. Dahlia Ghoshal1, Juniper Pol- lock2, Azure Hansen2, William McGehee2, John Kitching2, 1) Columbia University, New York, NY 10027, 2) NIST, Boul- der, CO 80305. Ramsey interrogation is generally considered more robust than continuous-wave (CW) interrogation for CPT clocks. However, power broadening and buffer gas collisions can create regimes in which CW offers better clock stability. We numerically simulate both techniques in a lambda system in rubidium to find their respective optimal re- gimes. Supported by NIST.
LM4G – 3 Designing a Deep-Sea Atomic Clock for Geological Research and Exploration, Liam Brennan1, Leo Hollberg2 , 1) University of Florida, Gainesville, FL 32611, 2) Stanford University, Stanford, CA 94305. We designed an underwater Cesium-based Atomic Clock system for use in exploration, navigation, and geological research. This system will operate under high pressures, low temperatures, and utilize only small amounts of power for lengthy durations of time. Supported by Stanford University and The Leadership Alliance.
LM4G – 4 Developing a network of synthetically coupled mechanical oscillators to demonstrate topological ef- fects, Ritika Anandwade1, Ellen Carlson2, Yaashnaa Singhal1, Michael Castle1, Caitlyn Battle-McDonald3, Sai Paladugu1, Shraddha Agarwal1, Bryce Gadway1, 1) University of Illinois at Urbana-Champaign, Urbana, IL 61801, 2) Haverford College, Haverford, PA 19041, 3) Smith College, Northampton, MA 01063. Energy exchange between harmonic oscilla- tors coupled in a network provides a mechanical analog to explore lattice transport phenomena. Using laser-based position monitoring and external driving by magnetic fields, we implement a new platform of synthetic mechanical network. Os- cillators are tuned and coupled through remote feedback-control. We will present preliminary results. This material is based upon work supported by the NSF.
LM4G – 5 Observation and characterization of stochastic resonance in directed propagation of cold atoms, Kefeng Jiang, Alexander Staron, Ajithamithra Dharmasiri, Anthony Rapp, Samir Bali, Department of Physics, Miami University, Oxford, OH 45056. We report on the observation and first experimental characterization of stochastic resonance in a modulated optical lattice, i.e., a resonant enhancement in the conversion of random atomic recoils from spontaneous emis- sion into directed motion. We study the dependence of stochastic resonance on modulation depth and lattice well depth. Funded by Army Research Office (ARO).
LM4G – 6 Modeling photoassociation in a multiplexed strontium optical lattice clock, Haoran Li, Brett Merriman, Jonathan Dolde, Xin Zheng, Shimon Kolkowitz Department of Physics, University of Wisconsin – Madison WI 53706. We have modeled the process of removing pairs of strontium atoms with a 1S0 – 3P1 photoassociation transition until one or zero atom is left on each lattice site. We also constructed a low-noise photodiode that will be used for intensity noise sup- pression of our lattice laser. Financial support provided by: Wisconsin Alumni Research Foundation, NIST, John Temple- ton Foundation, ARO, and Packard Foundation.
LM4G – 7 Analytic Calculation of Wannier Functions for Optical Lattice Experiments, Max L. Prichard, Peter E. Dotti, David M. Weld, University of California, Santa Barbara, Santa Barbara, CA 93106. We demonstrate the calcula- tion of Maximally Localized Wannier Functions for general 2-D optical lattice experiments by mapping the procedure to an eigenvalue problem. We find this method to be more robust than numerical optimization methods and easily general- izable to higher dimensions and more complicated lattices. Supported by NSF, CAIQUE, and UCSB MRL.
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