Browsing by Author "Wu Qi"

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Browsing by Author "Wu Qi"

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  • Allsilicon polarizing filters for nearinfrared wavelengths 
    Wu Qi; De Silva Lakshman; Arnold Matthew; Hodgkinson Ian; Takeuchi Eric (American Institute of Physics, 2004)
    We discuss the design and fabrication of optical filters that are transparent to a preferred linear polarization, but are partially or substantially reflective to the orthogonal linear polarization. The filters are ...
  • Biaxial thinfilm coatedplate polarizing beam splitters 
    Hodgkinson Ian; Wu Qi; Arnold Matthew; De Silva Lakshman; Beydaghyan Gisia; Kaminska Kate; Robbie Kevin (Optical Society of America, 2006)
    We present a design for a biaxial thin-film coated-plate polarizing beam splitter that transmits the p-polarized component of a beam of light without change of direction and reflects the s-polarized component. The beam ...
  • Bideposited thinfilm retardation plates for use at deep UV wavelengths 
    Hodgkinson Ian; Wu Qi; Arnold Matthew; De Silva Lakshman; Blaikie Richard (Elsevier Inc, 2004)
    The physical vapour deposition process of serial bideposition is used to fabricate inorganic retardation plates of LaF3, NdF3, Sc2O3 and SmF3. For a deposition angle of 70 the form-birefringent materials exhibit linear ...
  • Chiral mirror and optical resonator designs for circularly polarized light suppression of crosspolarized reflectances and transmittances 
    Hodgkinson Ian; Wu Qi; Arnold Matthew; Mccall Martin; Lakhtakia Akhlesh (Elsevier Science Bv, 2002)
    A left-handed chiral sculptured thin film (STF) that reflects strongly at the wavelength of the circular Bragg resonance tends to partially convert the handedness of incident LCP (left-circularly-polarized) light to RCP ...
  • Direct nanoengineering and lithographic patterning of optically anisotropic thin films 
    Hodgkinson Ian; Wu Qi; Arnold Matthew; Blaikie Richard (Elsevier, 2001)
    Biaxial and chiral thin films formed by oblique vapour deposition are patterned using standard photolithography. In one example 5 ?m wide half-wave plates are fabricated by reactive ion etching a biaxial silicon film.
  • Growth and characterisation of birefringent films on textured silicon substrates 
    Walsby Edward; Arnold Matthew; Wu Qi; Hodgkinson Ian; Blaikie Richard (Elsevier, 2005)
    The effects of textured substrates on the serial bi-deposition (SBD) technique of thin film growth have been investigated. Obliquely deposited coatings exhibit optical anisotropy as a consequence of the internal nanostructure ...
  • Inorganic positive uniaxial films fabricated by serial bideposition 
    Hodgkinson Ian; Wu Qi; De Silva Lakshman; Arnold Matthew (Optical Society of America, 2004)
    The physical vapor deposition process of serial bideposition is adapted to the fabrication of uniaxial optical coatings. During the coating process the vapor impinges at an angle of incidence of about 70 on to the substrate, ...
  • Multiaxis retarder arrays by masked oblique deposition 
    Arnold Matthew; Hodgkinson Ian; Wu Qi; Blaikie Richard (American Institute of Physics, 2005)
    We report a technique for single-deposition production of arrays with differently oriented nano-structured elements, which we optimize for application to form-birefringent retarder arrays. The technique involves masking ...
  • Natural and nanoengineered chiral reflectors: Structural color of manuka beetles and titania coatings 
    De Silva Lakshman; Hodgkinson Ian; Murray Petra; Wu Qi; Arnold Matthew; Leader John; Mcnaughton Andrew (Taylor & Francis, 2005)
    A parallel study of natural and nanoengineered structurally chiral reflecting coatings is described. It is shown that the nanostructures are different in a minor way but are optically equivalent. Refractive index matching ...
  • Structurallyperturbed chiral Bragg reflectors for elliptically polarized light 
    Hodgkinson Ian; Wu Qi; De Silva Lakshman; Arnold Matthew; Lakhtakia Akhlesh; Mccall Martin (Optical Society of America, 2005)
    The structure of an inorganic chiral medium represented as a stack of identical form-birefringent layers that twist steadily with increasing thickness is perturbed by realigning a fraction of each layer to a fixed ...
  • Supermodes of chiral photonic filters with combined twist and layer defects 
    Hodgkinson Ian; Wu Qi; De Silva Lakshman; Arnold Matthew; Mccall Martin; Lakhtakia Akhlesh (American Physical Society, 2003)
    We consider the circularly polarized localized modes of chiral photonic structures with combined central twist and isotropic layer defects. The general filter is shown to suffer from anomalous remittance and saturation ...