Coherent optical phonon generation in Bi3Ge4O12

被引：5
作者：
Chen, Z. [1 ]
Gao, Y. [1 ]
Minch, B. C. [1 ]
DeCamp, M. F. [1 ]
机构：
[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2011年 / 23卷 / 38期
关键词：
TIME-DOMAIN SPECTROSCOPY; TERAHERTZ SPECTROSCOPY; LIGHT-PULSES; THZ PHONONS; WATER-VAPOR; SCATTERING; BI4GE3O12; BISMUTH;
D O I：
10.1088/0953-8984/23/38/385402
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Time-domain spectroscopy of coherent optical phonons in bismuth germinate (Bi4Ge3O12) is presented. Utilizing both impulsive stimulated Raman scattering and time-domain terahertz spectroscopy, more than 12 unique vibrational states ranging in frequency from 2 to 11 THz are identified, each with coherent lifetimes ranging from 1 to 20 ps. These modes are highly sensitive to crystal orientation and demonstrate frequency shifts on picosecond timescales consistent with an anharmonic lattice potential.
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页数：6
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