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Your search keyword '"Gawith C"' showing total 2 results
Start Over Author "Gawith C" Publisher taylor & francis ltd
2 results on '"Gawith C"'

1. Direct Optical Observation of Walls and Disclination Effects in Active Photonic Devices.

Author

Snow, B. D., Adikan, F. R. M., Gates, J. C., Gawith, C. B. E., Dyadyusha, A., Major, Huw E., Kaczmarek, M., and Smith, P. G. R.

Subjects
LIQUID crystals, BRAGG gratings, WAVELENGTHS, GEOMETRY, ELECTRIC potential
Abstract

Liquid crystal tunable Bragg Gratings defined in planar substrates via a laser patterning technique exhibit complex wavelength tuning. This tuning displays threshold points and hysteresis. These tuning features are shown to be a manifestation of physical processes occurring in the confined geometry of our tunable devices. Such physical processes include the formation and removal of line disclinations and an associated wall. We discuss the effect of walls in the liquid crystal with regards to voltage tuning characteristics and whether they may allow faster wavelength tuning. [ABSTRACT FROM AUTHOR]

Published
2009
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2. Bidimensional Hexagonal Poling of LiNbO3 for Nonlinear Photonic Crystals and Quasi-Crystals.

Author

Gallo, K., Gawith, C. B. E., and Smith, P. G. R.

Subjects
*FERROELECTRIC crystals, *LITHIUM niobate, *QUASICRYSTALS, *PHOTONICS, *FERROMAGNETIC materials, *MAGNETIC domain, *CRYSTALS
Abstract

We report on the fabrication of bidimensional arrays of hexagonal domains with strictly periodic and quasi-periodic patterns for the implementation of nonlinear photonic crystals and quasi-crystals in z-cut congruent LiNbO3. [ABSTRACT FROM AUTHOR]

Published
2006
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