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6 Result(s)

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  1. No Access

    Article

    Hollow-core photonic crystal fibres for delivery and compression of ultrashort optical pulses

    We describe the use of tapered hollow-core photonic crystal fibres for delivery and compression of ultrashort optical pulses. We demonstrate delivery of transform-limited pulses with less than 100 fs pulse len...

    J. C. Knight, F. Gérôme, W. J. Wadsworth in Optical and Quantum Electronics (2007)

  2. No Access

    Article

    Microstructured Silica as an Optical-Fiber Material

    J. C. Knight, T. A. Birks, B. J. Mangan, P. St. J. Russell in MRS Bulletin (2001)

  3. No Access

    Chapter

    Characterising Whispering-Gallery Modes In Microspheres Using A Near-Field Probe

    We use scanning near-field optical microscopy to study the spatial structure of electromagnetic resonance modes in a high-Q dielectric microcavity of the whispering-gallery mode type. Direct observation of the...

    J. C. Knight, N. Dubreuil, V. Lefevre-Seguin… in Microcavities and Photonic Bandgaps: Physi… (1996)

  4. No Access

    Chapter

    Near Field Optics with High-Q Whispering-Gallery Modes

    High-Q whispering-gallery modes (WGM) are resonant electromagnetic modes which can be observed in dielectric microspheres with diameters larger than about ten times the wavelength [1]. They correspond to high ...

    N. Dubreuil, J. C. Knight, J. Hare, V. Lefevre-Seguin… in Optics at the Nanometer Scale (1996)

  5. No Access

    Article

    Nanoindentation experiments on some amorphous hydrogenated carbon (a-C:H) thin films on silicon

    Ultra-low-load indentation (nanoindentation) experiments have been used to investigate the load-displacement characteristics of two types of hydrogenated carbon films (a “hard” and a “soft” version ∼230 and ∼2...

    J. C. Knight, A. J. Whitehead, T. F. Page in Journal of Materials Science (1992)

  6. No Access

    Article

    The mechanical properties of ceramics from bauxite waste

    This paper summarizes the development of engineering ceramics made from bauxite waste (“red mud”) produced in the alumina industry in Jamaica. Test specimens are fabricated from powders by sintering. For a par...

    J. C. Knight, Arun S. Wagh, W. A. Reid in Journal of Materials Science (1986)