Study of Photoluminescence Mechanism of Rare Earth Ions in Compound-Semiconductors by Means of Magneto-Circular Photoluminescence

磁环光致发光研究化合物半导体中稀土离子的光致发光机理

• 批准号: 02452074
• 负责人: SATO Katsuaki
• 金额: $ 4.03万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452074/
• 关键词: magnetocircular dichroism of absorption; magnetocircular photoluminescence; Al_2O_3 : Cr^<3+>; CaS : Eu^<2+>; CuAlS_<> : Tb^<3+>; f-d transition; f-f transition; electron spin resonance; Al_2O_3:Cr; CaS:Eu; CuAlS_2:Tb; 磁気円二色性発光スペクトル; 磁気円二色性吸収ス

A system of spectroscopic measurement for manetocircular dichroism of absorption(MCDA)and for magnatocircular photoluminescence(MCPL)was constructed using a photoelastic modulator.Using this technique, MCPL, as well as MCDA spectra in ruby (Al_2O_3 : Cr^<3+>) at 25 K were measured. These spectra were analyzed in terms of the ligand-field theory. However, the analysis failed to explain the observed MCPL lineshape of R_1-line.Spectra of MCPL and MCDA were also measured in a CaS : Eu^<2+> single crystal prepared by floating-zone technique in an arc-image furnace. Fine structures observed in MCPL and MCDA were assigned to three zero-phonon lines(ZPL)of f-d transition and phonon-side lines associated with the ZPL.Tb-doped single crystals of CuAlS_2 were grown by the chemical transport technique. PL spectra measured in these crystals showed a broad yellow band of host crystal and several Tb^<3+>-lines superposed on the band. Excited state of the Tb-origin energy level was found by the MCDA spectrum, although PLE(photoluminescence excitation)and optical absorption spectra showed no lines associated with the excited state of Tb^<3+>.Thus MCPL and MCDA techniques turns out to be a powerful tool for the characterization of electronic structures of rare-earth and transition ions in compound-semiconductors.

利用光弹调制器建立了红宝石（Al_2O_3：Cr^<3+>）的磁圆吸收二色性（MCDA）和磁圆光致发光（MCPL）光谱测量系统，测量了25 K下红宝石的MCPL和MCDA光谱。这些光谱进行了分析的配位场理论。在电弧成像炉中用浮区法制备了CaS：Eu^<2+>单晶，测量了MCPL和MCDA的光谱。在MCPL和MCDA中观察到的精细结构被归属为三条f-d跃迁的零声子线（ZPL）和与ZPL相关的声子边线。在这些晶体中测量的PL光谱显示了主体晶体的宽黄色带和叠加在该带上的几条Tb^<3+>-线。MCDA谱发现了Tb原子的激发态，而PLE谱和光吸收谱没有发现Tb^<3+>激发态的谱线，因此MCPL和MCDA技术成为表征化合物半导体中稀土离子和过渡离子电子结构的有力工具。

项目成果

Y. Kudo, A. Kojima, Y. Takada, I. Aksenov and K. Sato: ""Photoluminescence Spectra in Tb-Doped Single Crystals of CuAlS_2"" Jpn. J. Appl. Phys.31. (1992)

Y. Kudo、A. Kojima、Y. Takada、I. Aksenov 和 K. Sato：“CuAlS_2 掺铽单晶中的光致发光光谱”Jpn。

I.Aksenov,Y.Kudo,K.Sato: "ESR of Tb^<3+> Ion in CuAlS_2" Jpn.J.Appl.Phys.

I.Aksenov、Y.Kudo、K.Sato：“CuAlS_2 中 Tb^<3> 离子的 ESR”Jpn.J.Appl.Phys。

K. Sato and M. Hirai: ""Anomalous Behavior of the Magnetocircular Photoluminescence Line Shape of R-Lines in Ruby (Al_2O_3 : Cr)"" J. Magn. & Magn. Mater.

K. Sato 和 M. Hirai：“红宝石中 R 线的磁圆光致发光线形状的异常行为 (Al_2O_3 : Cr)”J. Magn。

I. Aksenov, Y. Kudo and K. Sato: ""Electron Spin Resonance of Tb^<3+> Ion in CuAlS_2"" Jpn. J. Appl. Phys.

I. Aksenov、Y. Kudo 和 K. Sato：“CuAlS_2 中 Tb^<3 > 离子的电子自旋共振”Jpn。

K.Sato,M.Hirai and T.Tamaki: "Magnetic-Field Dependence of Magneto circular Photoluminescence Spectra in Ruby" J.Phys.Soc.Jpn.

K.Sato、M.Hirai 和 T.Tamaki：“红宝石中磁圆形光致发光光谱的磁场依赖性”J.Phys.Soc.Jpn。