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Frontiers of Engineering Reports on Leading-Edge Engineering from the 2009 Symposium (2010) / Chapter Skim
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Nano-Opto-Mechanics: Using Light Forces in Guided-Wave Nanostructures--Matt Eichenfield, Ryan M. Camacho, Jasper Chan, Qiang Lin, Jessie Rosenberg, Amir H. Safavi-Naeini, and Oskar Painter
Pages 57-66

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 57...
... It is now widely understood that optical gradient forces, as opposed to the scattering radiation pressure force, can be used in guided-wave nanostructures to generate very large optomechanical couplings to micro- or nano-mechanical motion (Eichenfield et al., 2009a)
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From page 58...
... -over-optical communication to the study of mesoscopic quantum systems. INTRODUCTION TO OPTOMECHANICAL CRYSTALS Periodicity applied to the propagation of light gives rise to photonic crystals that can be used to engineer broad- and narrow-band dispersion, to confine opti cal modes to small volumes with high optical quality factors, and to build planar lightwave circuits (Yablonovitch, 1987)
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From page 59...
... The three bands that form defect modes that are discussed in this paper are colored. The bottom-most mode is from the X point of the red band; the Γ points of the green and blue bands correspond to the middle and top mechanical modes, respectively.
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From page 60...
... , one can calculate the derivative of the resonant frequency of a structure's optical modes, with respect to the α-parameterization of a surface deformation perpendicular to the surface of the structure. An example of the power of the perturbative method to engineer the opto mechanical coupling strength, is shown in Figure 3, in which the optomechanical coupling strength of the fundamental accordian mechanical mode at ~1.5 GHz is a function of beam width.
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From page 61...
... (c) Localized, optomechanically coupled mechanical modes of the nanobeam OMC.
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From page 62...
... The narrower mechanical mode envelope results in drastically different optomechanical coupling contributions from those with the wider beam. Source: Eichenfield, et al.
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From page 63...
... FIGURE 5 Photon-to-phonon scattering matrix amplitudes as a function of laser detuning, ∆. |s11| is the reflected signal from the optical waveguide coupled to cavity a, |s 22| is the reflected signal for the phonon input.
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From page 64...
... can be as high as 75 percent, limited by internal mechanical and optical loss. These encouraging initial theoretical results indicate that the traveling pho ton-phonon translator concept can be used to interconvert photons and phonons with high efficiency for applications in optical delay lines (the slower phonon provides the delay)
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From page 65...
... 2008. Microfabricated phononic crystal devices and applications.
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Key Terms

  • optical modes
  • localized optical
  • mechanical mode
  • mechanical modes
  • optomechanical crystals

  • optical mode
  • optical cavities
  • mechanical vibrations
  • phononic cavity
  • shifting material

  • beam width
  • perturbation theory
  • optical cavity
  • optical waveguide
  • mechanical motion

  • photonic crystals
  • nanobeam shown
  • nanobeam omc
  • phononic crystal
  • silicon nanobeam

  • periodic structures
  • pressure force
  • periodicity applied
  • effective length
  • scattering radiation

  • mode frequency
  • wave circuits
  • sound wave
  • reflected signal
  • material boundaries


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