首页|High-excited-state splitting and multimode vibrational coupling in Mn4+-activated fluoride phosphor
High-excited-state splitting and multimode vibrational coupling in Mn4+-activated fluoride phosphor
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
Excited-states play a crucial role in the optical absorption and luminescence of solids and hence their accurate information is highly desired.Herein,we attempt to seize the excited-states information of Mn4+ions in K2SiF6 microcrystals via measuring and calculating their variable-temperature photoluminescence excitation(PLE)spectra.At cryogenic temperatures,an unpredicted splitting of the high-excited-state is observed.Moreover,the two-split high-excited-state levels are further revealed to primarily couple with the two hyperfine split modes of quasi-localized v2 vibration in the distorted Mn-F6 octahedral configuration,whereas the coupling strengths are found to be substantially different from each other.The slightly split vibrational mode is firmly supported by the low-temperature Raman spectra.Jahn-Teller lattice distortion is believed to be responsible for the observed splitting of the electronic high-excited-state and the quasi-localized vibrational mode.
splitting of excited-statephotoluminescence excitation spectrumelectron-phonon couplingJahn-Teller effect
Department of Optical Science and Engineering,School of Information Science and Technology,Fudan University,Shanghai 200438,China
Jiangsu Key Laboratory of Advanced Laser Materials and Devices,School of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou 221116,China
Division of Natural and Applied Sciences,Duke Kunshan University,Kunshan 215316,China
国家自然科学基金国家自然科学基金Science,Technologv,and Innovation Commission of Shenzhen MunicipalityScience,Technologv,and Innovation Commission of Shenzhen Municipality
万方数据
