Reducing support loss in micromechanical ring resonators using phononic band-gap structures

被引：36

作者：

Hsu, Feng-Chia ^{[1
]}

Hsu, Jin-Chen ^{[2
]}

Huang, Tsun-Che ^{[1
]}

Wang, Chin-Hung ^{[1
]}

Chang, Pin ^{[1
]}

机构：

[1] Ind Technol Res Inst S, Tainan 709, Taiwan

[2] Natl Yunlin Univ Sci & Technol, Dept Mech Engn, Touliu 64002, Yunlin, Taiwan

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2011年 / 44卷 / 37期

关键词：

ANCHOR LOSS; ABSORPTION; WAVES; SOUND;

D O I：

10.1088/0022-3727/44/37/375101

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In micromechanical resonators, energy loss via supports into the substrates may lead to a low quality factor. To eliminate the support loss, in this paper a phononic band- gap structure is employed. We demonstrate a design of phononic-crystal (PC) strips used to support extensional wine-glass mode ring resonators to increase the quality factor. The PC strips are introduced to stop elastic-wave propagation by the band-gap and deaf-band effects. Analyses of resonant characteristics of the ring resonators and the dispersion relations, eigenmodes, and transmission properties of the PC strips are presented. With the proposed resonator architecture, the finite-element simulations show that the leaky power is effectively reduced and the stored energy inside the resonators is enhanced simultaneously as the operating frequencies of the resonators are within the band gap or deaf bands. Realization of a high quality factor micromechanical ring resonator with minimized support loss is expected.

引用

页数：10

共 43 条

[21] Support Loss Suppression in Micromechanical Resonators by the use of Phononic Band Gap Structures [J].