Inter-Stark Energy Levels and Effects of Temperature on Sharp Emission Lines of Nd3+ in LiYF4

• Published in: Physica status solidi. A, Applied research Vol. 173; no. 2; pp. 521 - 534
• Main Authors: Sardar, D. K., Yow, R. M.
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag 01-06-1999; WILEY‐VCH Verlag; Wiley-VCH
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron states; Exact sciences and technology; Level splitting and interactions; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other solid inorganic materials; Photoluminescence; Physics; Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect; Spin-orbit coupling, zeeman, stark, and strain splitting, jahn-teller effect; Temperature dependence; Yttrium fluorides; Inorganic compounds; Neodymium additions; Ternary compounds; Optical transition; Fluorescence; Lithium fluorides; Stark effect; Experimental study
• ISSN: 0031-8965; 1521-396X
• DOI: 10.1002/(SICI)1521-396X(199906)173:2<521::AID-PSSA521>3.0.CO;2-1

The inter‐Stark components of the 4I9/2 and 4I11/2 manifolds have been characterized using the room‐temperature fluorescence spectra for the 4F3/2 → 4I9/2 and 4F3/2 → 4I11/2 transitions of Nd3+ in LiYF4 laser crystal. The thermal effects on the linewidths, positions, and line shifts of the inter‐Stark transitions of the 908 (R1 → X5) and 1052.4 (R1 → Y2) nm lines within the respective intermanifold transitions of 4F3/2 → 4I9/2 t and 4F3/2 → 4I11/2 t have been also investigated. The linewidths of these transitions are found to increase with increasing temperature. The 908 nm line is found to shift toward the shorter wavelength, while the 1052.4 nm line has shifted toward the longer wavelength. The experimental results of the temperature‐dependent widths and shifts of these sharp spectral lines are explained using the phonon–ion interaction theory which assumes the Debye model for phonons in crystalline solids.