Spectroscopy, crystal-field, and transition intensity analyses of the C3v(O2−) centre in Er3+ doped CaF2 crystals
Erbium ions in crystals show considerable promise for the technologies that will form the backbone of future networked quantum information technology. Despite advances in leveraging erbium’s fibre-compatible infrared transition for classical and quantum applications, the transitions are, in general,...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-12-01
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| Series: | Optical Materials: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590147824000779 |
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| Summary: | Erbium ions in crystals show considerable promise for the technologies that will form the backbone of future networked quantum information technology. Despite advances in leveraging erbium’s fibre-compatible infrared transition for classical and quantum applications, the transitions are, in general, not well understood. We present detailed absorption and laser site-selective spectroscopy of the C3v(O2−) centre in CaF2:Er3+ as an interesting erbium site case study. The 4I15/2Z1→4I13/2Y1 transition has a low-temperature inhomogeneous linewidth of 1 GHz with hyperfine structure observable from the 167Er isotope. A parametrized crystal-field Hamiltonian is fitted to 34 energy levels and the two ground state magnetic splitting factors. The wavefunctions are used to perform a transition intensity analysis and electric-dipole parameters are fitted to absorption oscillator strengths. Simulated spectra for the 4I11/2→4I15/2 and 4I13/2→4I15/2 inter-multiplet transitions are in excellent agreement with the experimentally measured spectra. The 4I13/2 excited state lifetime is 25.0ms and the intensity calculation is in excellent agreement with this value. |
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| ISSN: | 2590-1478 |