Optomechanical and photothermal interactions in suspended photonic crystal membranes

David Woolf, Pui Chuen Hui, Eiji Iwase, Mughees Khan, Alejandro W. Rodriguez, Parag Deotare, Irfan Bulu, Steven G. Johnson, Federico Capasso, Marko Loncar

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    16 Citations (Scopus)


    We present here an optomechanical system fabricated with novel stress management techniques that allow us to suspend an ultrathin defect-free silicon photonic-crystal membrane above a Silicon-on-Insulator (SOI) substrate with a gap that is tunable to below 200 nm. Our devices are able to generate strong attractive and repulsive optical forces over a large surface area with simple in- and out- coupling and feature the strongest repulsive optomechanical coupling in any geometry to date (gOM/2π ≈ -65 GHz/nm). The interplay between the optomechanical and photo-thermalmechanical dynamics is explored, and the latter is used to achieve cooling and amplification of the mechanical mode, demonstrating that our platform is well-suited for potential applications in low-power mass, force, and refractive-index sensing as well as optomechanical accelerometry.

    Original languageEnglish
    Pages (from-to)7258-7275
    Number of pages18
    JournalOptics Express
    Issue number6
    Publication statusPublished - 2013 Mar 25


    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Woolf, D., Hui, P. C., Iwase, E., Khan, M., Rodriguez, A. W., Deotare, P., Bulu, I., Johnson, S. G., Capasso, F., & Loncar, M. (2013). Optomechanical and photothermal interactions in suspended photonic crystal membranes. Optics Express, 21(6), 7258-7275. https://doi.org/10.1364/OE.21.007258