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Mironov AE, Hewitt JD, Eden JG. Spin Polarization of Rb and Cs np ^{2}P_{3/2} (n=5, 6) Atoms by Circularly Polarized Photoexcitation of a Transient Diatomic Molecule. Phys Rev Lett. 2017;118(11):113201doi: 10.1103/PhysRevLett.118.113201.
Mironov, A. E., Hewitt, J. D., & Eden, J. G. (2017). Spin Polarization of Rb and Cs np ^{2}P_{3/2} (n=5, 6) Atoms by Circularly Polarized Photoexcitation of a Transient Diatomic Molecule. Physical review letters, 118(11), 113201. https://doi.org/10.1103/PhysRevLett.118.113201
Mironov, A E, et al. "Spin Polarization of Rb and Cs np ^{2}P_{3/2} (n=5, 6) Atoms by Circularly Polarized Photoexcitation of a Transient Diatomic Molecule." Physical review letters vol. 118,11 (2017): 113201. doi: https://doi.org/10.1103/PhysRevLett.118.113201
Mironov AE, Hewitt JD, Eden JG. Spin Polarization of Rb and Cs np ^{2}P_{3/2} (n=5, 6) Atoms by Circularly Polarized Photoexcitation of a Transient Diatomic Molecule. Phys Rev Lett. 2017 Mar 17;118(11):113201. doi: 10.1103/PhysRevLett.118.113201. Epub 2017 Mar 15. PMID: 28368639.
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Phys Rev Lett. 2017 Mar 17;118(11):113201. doi: 10.1103/PhysRevLett.118.113201. Epub 2017 Mar 15.

Spin Polarization of Rb and Cs np ^{2}P_{3/2} (n=5, 6) Atoms by Circularly Polarized Photoexcitation of a Transient Diatomic Molecule.

Physical review letters

A E Mironov, J D Hewitt, J G Eden

Affiliations

  1. Laboratory for Optical Physics and Engineering, Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801, USA.
  2. Department of Engineering and Physics, Abilene Christian University, Abilene, Texas 79699, USA.

PMID: 28368639 DOI: 10.1103/PhysRevLett.118.113201

Abstract

We report the selective population of Rb or Cs np ^{2}P_{3/2} (n=5, 6; F=4, 5) hyperfine states by the photodissociation of a transient, alkali-rare gas diatomic molecule. Circularly polarized (σ^{-}), amplified spontaneous emission (ASE) on the D_{2} line of Rb or Cs (780.0 and 852.1 nm, respectively) is generated when Rb-Xe or Cs-Xe ground state collision pairs are photoexcited by a σ^{+}-polarized optical field having a wavelength within the D_{2} blue satellite continuum, associated with the B^{2}Σ_{1/2}^{+}←X^{2}Σ_{1/2}^{+} (free←free) transition of the diatomic molecule. The degree of spin polarization of Cs (6p ^{2}P_{3/2}), specifically, is found to be dependent on the interatomic distance (R) at which the excited complex is born, a result attributed to the structure of the B^{2}Σ_{1/2}^{+} state. For Cs-Xe atomic pairs, tuning the wavelength of the optical field from 843 to 848 nm varies the degree of circular polarization of the ASE from 63% to almost unity because of the perturbation, in the 5≤R≤6  Å interval, of the ^{2}Σ_{1/2}^{+} potential by a dσ molecular orbital associated with a higher ^{2}Λ electronic state. Monitoring only the Cs 6p ^{2}P_{3/2} spin polarization reveals a previously unobserved interaction of CsXe (B^{2}Σ_{1/2}^{+}) with the lowest vibrational levels of a ^{2}Λ state derived from Cs (5d)+Xe. By inserting a molecular intermediate into the alkali atom excitation mechanism, these experiments realize electronic spin polarization through populating no more than two np ^{2}P_{3/2} hyperfine states, and demonstrate a sensitive spectroscopic probe of R-dependent state-state interactions and their impact on interatomic potentials.

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