Abstract
We report observations of crystal defect induced modifications in the laser-excited Er3+ photoluminescence spectra of single-crystal Er2O3 thin films. These include marked enhancement of transition intensities known to be weak or nonexistent in as-grown samples. In this Letter, we examine the temperature and defect density dependence of the measurements and suggest photophysical processes that may account for these unexpected results.
| Original language | English |
|---|---|
| Article number | 231102 |
| Journal | Applied Physics Letters |
| Volume | 126 |
| Issue number | 23 |
| DOIs | |
| State | Published - Jun 9 2025 |
Funding
The work at Vanderbilt Univeristy was supported by the funds from the School of Arts and Science. A portion of this research was conducted at the Vanderbilt Institute of Nanoscale Science and Engineering. Dr. Kalman Varga was supported by the National Science Foundation (NSF) under Grant No. DMR-2217759. The work at the University of Texas was supported by the Air Force Office of Scientific Research under Grant No. FA9550-18-1-0053. Photoluminescence microscopy was supported by the Center for Nanophase Materials Sciences (CNMS2023-B-02065), a U.S. Department of Energy Office of Science User Facility. This work was performed, in part, at the Center for Integrated Nanotechnologies (CINT2023BU0094), an Office of Science User Facility operated by the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action-equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under Contract No. 89233218CNA000001.