Coherent guided acoustic phonons in GaN/AlN nanowire superlattices

被引：1
作者：
Iwai, Yuki [1 ]
Mizuno, Seiji [1 ]
机构：
[1] Hokkaido Univ, Div Appl Phys, Sapporo, Hokkaido 0608628, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2018年 / 57卷 / 07期
关键词：
MODES; GROWTH; DIODES; LAYER;
D O I：
10.7567/JJAP.57.07LB02
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We theoretically examine the coherent guided acoustic phonons generated and observed in a GaN/AlN nanowire superlattice by ultrafast pumpprobe spectroscopy. We consider the symmetry of the present nanowire superlattice and carry out the variational calculation of dispersion relations. By comparing numerical results with the results approximated using Rytov's equation, we examine the validity of the model used in the experimental explanation. The propagation processes of the guided coherent acoustic phonons previously observed are re-examined on the basis of our numerical results. (C) 2018 The Japan Society of Applied Physics
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页数：4
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