TUNABLE OPTICAL-DETECTION AND GENERATION OF TERAHERTZ PHONONS IN CAF2 AND SRF2

被引：27
作者：
EISFELD, W
RENK, KF
机构：
[1] Institut für Angewandte Physik, Universität Regensburg
来源：
APPLIED PHYSICS LETTERS | 1979年 / 34卷 / 08期
关键词：
D O I：
10.1063/1.90855
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A new method for tunable detection and generation of terahertz phonons is reported. It is based on our observation that the lowest energy level of excited Eu2+ ions in CaF2 and SrF2 crystals can be split by uniaxial stress into two levels with a variable separation up to 2.4 THz. Phonons are generated by one-phonon relaxation between these levels and detected by phonon-induced fluorescence radiation from the upper level. The detector is applied to study the spectral distribution of phonons generated by the heat-pulse technique.
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页码：481 / 483
页数：3
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