Summary form only given. Optical phased arrays (OPA) represent a versatile device for laser beam steering, adaptive optics, electronic lens, and network switching. An applied stepwise voltage creates a phase grating inside the liquid crystal (LC) media that deflects the incoming laser beam to a programmable angle with high precision and high energy efficiency. LC mixtures with /spl Delta/n/spl ges/0.4 and low viscosity, wide nematic range, low operating voltage and good UV stability are particularly desirable. Tolane liquid crystals exhibit a reasonably high /spl Delta/n, low viscosity, and good chemical, photo and thermal stability. The same properties are also found in isothiocyanates. Therefore, coupling tolane and NCS groups should lead to a high birefringence and large dielectric anisotropy while preserving a relatively low viscosity.


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    Titel :

    High birefringence liquid crystal mixtures for laser beam steering


    Beteiligte:
    Shin-Tson Wu, (Autor:in) / Sebastian Gauza, (Autor:in) / Haiying Wang, (Autor:in)


    Erscheinungsdatum :

    01.01.2002


    Format / Umfang :

    102580 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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