Femtogram Doubly Clamped Nanomechanical Resonators Embedded in a High-Q Two-Dimensional Photonic Crystal Nanocavity
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- 作者：Xiankai Sun ; Jiangjun Zheng ; Menno Poot ; Chee Wei Wong ; Hong X. Tang
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：May 9, 2012
- 年：2012
- 卷：12
- 期：5
- 页码：2299-2305
- 全文大小：423K
- 年卷期：v.12,no.5(May 9, 2012)
- ISSN：1530-6992
文摘
We demonstrate a new optomechanical device system which allows highly efficient transduction of femtogram nanobeam resonators. Doubly clamped nanomechanical resonators with mass as small as 25 fg are embedded in a high-finesse two-dimensional photonic crystal nanocavity. Optical transduction of the fundamental flexural mode around 1 GHz was performed at room temperature and ambient conditions, with an observed displacement sensitivity of 0.94 fm/Hz1/2. Comparison of measurements from symmetric and asymmetric double-beam devices reveals hybridization of the mechanical modes where the structural symmetry is shown to be the key to obtain a high mechanical quality factor. Our novel configuration opens the way for a new category of 鈥淣EMS-in-cavity鈥?devices based on optomechanical interaction at the nanoscale.