研究目的
To investigate the hyperfine structure and observe anticrossings in high-resolution optical absorption spectra of a 7LiYF4:Ho3+ single crystal under external magnetic fields, and to analyze these spectra to retrieve information on hyperfine interactions and lattice strains.
研究成果
The direct observation of hyperfine level anticrossings in optical spectra was achieved, with gaps ranging from 0.01 to 0.06 cm^-1. Modeling confirmed that anticrossings with Δm = 2 are due to transverse hyperfine interactions, while those with Δm = 0 are caused by random lattice strains. This provides insights into hyperfine structures and crystal quality, with potential applications in quantum information processing.
研究不足
The study is limited to a specific crystal (7LiYF4:Ho3+) and temperature (10 K). The resolution of the spectrometer and the quality of the crystal (e.g., presence of random strains) may affect the observability of fine spectral details. Cross-relaxation broadening and magnetic dipole interactions between ions could influence line widths.
1：Experimental Design and Method Selection:
High-resolution Fourier-transform spectroscopy was used to measure optical absorption spectra with a resolution up to 0.002 cm^-1 in the spectral range 5000–10000 cm^-1. The experiment involved applying external magnetic fields parallel to the crystal's c-axis to study hyperfine level anticrossings.
2：002 cm^-1 in the spectral range 5000–10000 cm^-The experiment involved applying external magnetic fields parallel to the crystal's c-axis to study hyperfine level anticrossings.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: A sample of dimensions 3 × 3 × 8 mm^3 was cut from a monoisotopic 7LiYF4:Ho3+ (0.1 at. %) single crystal. Data were collected at a temperature of 10 K using a closed-cycle helium cryostat.
3：1 at. %) single crystal. Data were collected at a temperature of 10 K using a closed-cycle helium cryostat.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Bruker 125HR Fourier spectrometer for spectroscopy, Cryomech ST-403 closed-cycle helium cryostat for temperature control, an external electromagnet for applying magnetic fields (0–530 mT), and the 7LiYF4:Ho3+ crystal sample.
4：Experimental Procedures and Operational Workflow:
The sample was placed in the cryostat with the magnetic field and incident radiation aligned along the c-axis. Transmission spectra were detected at 10 K, with magnetic fields varied to observe hyperfine anticrossings.
5：Data Analysis Methods:
Spectral envelopes were modeled using a Hamiltonian that includes free-ion energy, crystal-field, Zeeman, electron-deformation, and hyperfine interactions. Numerical diagonalization was performed to simulate energies and wave functions, and Lorentz line shapes were assumed for fitting experimental data.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
