Measurement of pair interactions and 1.5 mu m emission from Er3+ ions in a C-82 fullerene cage

被引:41
作者
Macfarlane, RM [1 ]
Wittmann, G [1 ]
vanLoosdrecht, PHM [1 ]
deVries, M [1 ]
Bethune, DS [1 ]
Stevenson, S [1 ]
Dorn, HC [1 ]
机构
[1] VIRGINIA POLYTECH INST & STATE UNIV, DEPT CHEM, BLACKSBURG, VA 24061 USA
关键词
D O I
10.1103/PhysRevLett.79.1397
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Erbium ions encapsulated in the metallofullerene Er-2@C-82 emit near infrared fluorescence about 1.5 mu m, typical for I-4(13/2) --> I-4(15/2) transitions of Er3+. The similarity of spectra measured in glassy and polycrystalline media at 1.6 K, and the very narrow inhomogeneous linewidth (<1 cm(-1)), show that the fullerene cage provides a locally ordered environment for the two erbium ions, well isolated from the host medium. Spectral fine-structure is observed with line splittings of similar to 10 cm(-1). It is proposed that these splittings are dominated by exchange interaction between the two Er3+ ions involving a novel superexchange pathway through the C-82 cage.
引用
收藏
页码:1397 / 1400
页数:4
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