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Controlling photonic structures using optical forces

机译：利用光学力控制光子结构

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摘要

The use of optical forces to manipulate small objects is well known. Applications include the manipulation of living cells by optical tweezers and optical cooling in atomic physics2. The miniaturization of optical systems (to the micro and nanoscale) has resulted in very compliant systems with masses of the order of nanograms, rendering them susceptible to optical forces. Optical forces have been exploited to demonstrate chaotic quivering of microcavities, optical cooling of mechanical modes, actuation of a tapered-fibre waveguide and excitation of the mechanical modes of silicon nano-beams. Despite recent progress in this field, it is challenging to manipulate the optical response of photonic structures using optical forces; this is because of the large forces that are required to induce appreciable changes in the geometry of the structure. Here we implement a resonant structure whose optical response can be efficiently statically controlled using relatively weak attractive and repulsive optical forces. We demonstrate a static mechanical deformation of up to 20 nanometres in a silicon nitride structure, using three milliwatts of continuous optical power. Because of the sensitivity of the optical response to this deformation, such optically induced static displacement introduces resonance shifts spanning 80 times the intrinsic resonance linewidth.
机译：使用光学力来操纵小物体是众所周知的。应用包括通过光镊操作活细胞和原子物理学中的光冷却2。光学系统的微型化（微米和纳米级）已导致质量非常顺应的系统具有纳克数量级的质量，使它们容易受到光学力的影响。已经利用光学力来证明微腔的混沌颤振，机械模的光学冷却，锥形光纤波导的致动以及硅纳米束的机械模的激发。尽管在该领域有新进展，但是利用光力操纵光子结构的光学响应仍然是一个挑战。这是因为需要很大的力才能导致结构的几何形状发生明显变化。在这里，我们实现了一种共振结构，该结构可以使用相对较弱的吸引力和排斥力有效地静态控制光学响应。我们演示了使用三毫瓦的连续光功率，在氮化硅结构中静态机械变形高达20纳米。由于光学响应对这种变形的敏感性，这种光学感应的静态位移会引入共振位移，其跨度是固有共振线宽的80倍。

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  • 来源
    《Nature》 |2009年第7273期|633-636|共4页
  • 作者

    Gustavo S. Wiederhecker; Long Chen; Alexander Gondarenko; Michal Lipson;

  • 作者单位

    School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA;

    School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA;

    School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA;

    School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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