期刊
APPLIED PHYSICS LETTERS
卷 116, 期 16, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0002974
关键词
-
资金
- Research Grant Council of the Hong Kong SAR government [AoE/P-02/12]
Besides generating their own perfect absorption bands, the primary hybrid resonances of a hybrid membrane resonator (HMR) consisting of a decorated membrane resonator (DMR) backed by a cavity can also provide strong assistance for weak resonances to create secondary hybrid resonances and multiple-frequency perfect absorption by forming a low impedance region between the primary hybrid resonances. The weak resonances can be introduced by placing another DMR in front of a HMR or by using a DMR with an off-centered platelet in an HMR. In one such sample, five perfect absorption bands within the range of 200-1000Hz are experimentally observed with minimum reflection values ranging from 1.2% to 7%.
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