• 文献标题:   Graphene mechanical oscillators with tunable frequency
  • 文献类型:   Article
  • 作  者:   CHEN CY, LEE S, DESHPANDE VV, LEE GH, LEKAS M, SHEPARD K, HONE J
  • 作者关键词:  
  • 出版物名称:   NATURE NANOTECHNOLOGY
  • ISSN:   1748-3387 EI 1748-3395
  • 通讯作者地址:   Columbia Univ
  • 被引频次:   137
  • DOI:   10.1038/NNANO.2013.232
  • 出版年:   2013

▎ 摘  要

Oscillators, which produce continuous periodic signals from direct current power, are central to modern communications systems, with versatile applications including timing references and frequency modulators(1-7). However, conventional oscillators typically consist of macroscopic mechanical resonators such as quartz crystals, which require excessive off-chip space. Here, we report oscillators built on micrometre-size, atomically thin graphene nanomechanical resonators, whose frequencies can be electrostatically tuned by as much as 14%. Self-sustaining mechanical motion is generated and transduced at room temperature in these oscillators using simple electrical circuitry. The prototype graphene voltage-controlled oscillators exhibit frequency stability and a modulation bandwidth sufficient for the modulation of radiofrequency carrier signals. As a demonstration, we use a graphene oscillator as the active element for frequency-modulated signal generation and achieve efficient audio signal transmission.