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Open Access
Peer-reviewed
Research Article
* E-mail: cah77@usc.edu (CAH); phillips@pboc.caltech.edu (RP)
Affiliations Department of Physics and Astronomy, University of Southern California, Los Angeles, California, United States of America, Department of Applied Physics, California Institute of Technology, Pasadena, California, United States of America
Affiliation Department of Applied Physics, California Institute of Technology, Pasadena, California, United States of America
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