Hypersonic rugate filters based on porous silicon

被引：19
|
作者：
Thomas, L. [1 ]
Aliev, G. N. [1 ]
Snow, P. A. [1 ]
机构：
[1] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 17期
基金：
英国工程与自然科学研究理事会;
关键词：
REFLECTANCE; DEPTH;
D O I：
10.1063/1.3506582
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Periodic solid state structures exhibit transmission stopbands for waves of certain frequencies. We demonstrate porous silicon based rugate filters with 40 dB rejection first-order stopbands for longitudinal acoustic waves at hypersonic frequencies and the predicted suppression of higher order bands. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3506582]
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页数：3
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