Pressure Effects on Spectra of Tunable Laser Crystal GSGG:Cr3+ II: Energy Spectra at Normal Pressure, Low and Room Temperatures  

Pressure Effects on Spectra of Tunable Laser Crystal GSGG：Cr^3＋ Ⅱ：Energy Spectra at Normal Pressure,Low and Room Temperatures

作　　者：ZHANGJi－Ping MADong－Ping 等 

机构地区：[1]DepartmentofAppliedPhysics,SichuanUniversity,Chengdu610065,China [2]InternationalCentreforMaterialsPhysics,theChineseAcademyofSciences,Shenyang110015,China

出　　处：《Communications in Theoretical Physics》2003年第3期349-358,共10页理论物理通讯（英文版）

摘　　要：With the strong-field scheme and trigonal bases, the complete d<SUP>3</SUP> energy matrix in a trigonally distorted cubic-field has been constructed. By diagonalizing this matrix, the normal-pressure energy spectra and wavefunctions of GSGG:Cr<SUP>3+</SUP> at 70 K and 300 K have been calculated without the electron-phonon interaction (EPI), respectively. Further, the contributions to energy spectra from EPI at two temperatures have also been calculated, where temperature-independent terms of EPI are found to be dominant. The sum of aforementioned two parts gives rise to the total energy spectrum. The calculated results are in good agreement with all the optical-spectral experimental data and the experimental results of and . It is found that the contribution from EPI to R<SUB>1</SUB> line of GSGG:Cr<SUP>3+</SUP> with taking into account spin-orbit interaction (H<SUB>so</SUB>) and trigonal field (V<SUB>trig</SUB>) is much larger than the one with neglecting H<SUB>so</SUB> and V<SUB>trig</SUB>, and accordingly it is essential for the calculation of the EPI effect to take first into account H<SUB>so</SUB> and V<SUB>trig</SUB>. The admixture of base-wavefunctions,and , the average energy separation and their variations with temperature have been calculated and discussed.

关 键 词：crystal fields optical properties spin-orbital interaction electron-phonon interaction coupling beween t(2)(2)(T-3(1))e(4)T(2) and t(2)(3) E-2 tunable laser crystal 

分 类 号：TN248[电子电信—物理电子学]