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Title: Phonon-mediated temperature dependence of Er3+ optical transitions in Er2O3

Journal Article · · Communications Physics
ORCiD logo [1];  [1];  [2]; ORCiD logo [2];  [3]; ORCiD logo [4];  [5];  [6];  [7]; ORCiD logo [8];  [1];  [1];  [2]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [9];  [1]
  1. Vanderbilt Univ., Nashville, TN (United States)
  2. Univ. of Texas, Austin, TX (United States)
  3. Vanderbilt Univ., Nashville, TN (United States); Western Michigan Univ., Kalamazoo MI (United States)
  4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  5. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  6. Fisk Univ., Nashville, TN (United States)
  7. Vanderbilt Univ., Nashville, TN (United States); Maria Curie-Sklodowska Univ., Lublin (Poland)
  8. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
  9. Vanderbilt Univ., Nashville, TN (United States); Rutgers Univ., Piscataway, NJ (United States)

Characterization of the atomic level processes that determine optical transitions in emerging materials is critical to the development of new platforms for classical and quantum networking. Such understanding often emerges from studies of the temperature dependence of the transitions. We report measurements of the temperature dependent Er3+ photoluminescence in single crystal Er2O3 thin films epitaxially grown on Si(111) focused on transitions that involve the closely spaced Stark-split levels. Radiative intensities are compared to a model that includes relevant Stark-split states, single phonon-assisted excitations, and the well-established level population redistribution due to thermalization. This approach, applied to the individual Stark-split states and employing Er2O3 specific single-phonon-assisted excitations, gives good agreement with experiment. This model allows us to demonstrate the difference in the electron-phonon coupling of the 4S3/2 and 2H11/2 states of Er3+ in E2O3 and suggests that the temperature dependence of Er3+ emission intensity may vary significantly with small shifts in the wavelength (~0.1 nm) of the excitation source.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC05-00OR22725; 89233218CNA000001
OSTI ID:
2317763
Journal Information:
Communications Physics, Vol. 7; ISSN 2399-3650
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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