3 papers
cond-mat.mtrl-sci2026
Optical Spectroscopy of Waveguide coupled Er ensembles in CaWO and YVO
Fabian Becker, Anna Selzer, Lorenz J. J. Sauerzopf +4
We present an optical study of near-surface Er ensembles in waveguide-integrated CaWO and YVO, investigating how nanophotonic coupling modifies rare-earth spectrosco…
cond-mat.mtrl-sci2025
Zeeman Spectroscopy of Vacancy-Charge-Compensated Er3+ Sites in CaWO4 under Vector Magnetic Fields
Fabian Becker, Sudip KC, Lorenz J. J. Sauerzopf +4
We present polarization-resolved optical absorption measurements on Er3+ ions in CaWO4 under vector magnetic fields, focusing on charge-compensated sites arising from local Ca2+ va…
cond-mat.mes-hall2024
Spectroscopic Investigations of Multiple Environments in Er:CaWO4 through Charge Imbalance
Fabian Becker, Catherine L. Curtin, Sudip KC +4
We present a detailed spectroscopic study of the and Er multiplets of Er:CaWO grown without a co-dopant. Using photoluminesce…