Bloch Oscillations of THz Acoustic Phonons in Coupled Nanocavity Structures

被引：41
|
作者：
Lanzillotti-Kimura, N. D. [1 ,2 ,3 ]
Fainstein, A. [1 ,2 ]
Perrin, B. [3 ]
Jusserand, B. [3 ]
Mauguin, O. [4 ]
Largeau, L. [4 ]
Lemaitre, A. [4 ]
机构：
[1] CNEA, Ctr Atom Bariloche, Rio Negro, Argentina
[2] CNEA, Inst Balseiro, Rio Negro, Argentina
[3] Univ Paris 06, CNRS, Inst Nanosci Paris, UMR 7588, F-74015 Paris, France
[4] CNRS, Lab Photon & Nanostruct, F-91460 Marcoussis, France
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 19期
关键词：
SUPERLATTICES; WAVE;
D O I：
10.1103/PhysRevLett.104.197402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Nanophononic Bloch oscillations and Wannier-Stark ladders have been recently predicted to exist in specifically tailored structures formed by coupled nanocavities. Using pump-probe coherent phonon generation techniques we demonstrate that Bloch oscillations of terahertz acoustic phonons can be directly generated and probed in these complex nanostructures. In addition, by Fourier transforming the time traces we had access to the proper eigenmodes in the frequency domain, thus evidencing the related Wannier-Stark ladder. The observed Bloch oscillation dynamics are compared with simulations based on a model description of the coherent phonon generation and photoelastic detection processes.
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页数：4
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