Demonstration of superimposing a short-pitch gratings for aligning liquid crystals onto a larger-pitch subwavelength resonant grating (SRG) is presented, to achieve superior liquid crystal alignment, which leads to drastically improved tuning filter performance and tuning range. The tunable SRG needs a 1 /spl mu/m pitch gratings for the desired filter resonance frequency, which is in the infrared, and a-shallower gratings with a pitch between 200 nm to 400 nm for aligning liquid crystal, which is used for tuning the resonance frequency of the filter. A tuning range of 21 nm has been achieved.


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    Title :

    Tunable liquid crystal-resonant grating filters using superimposed grating structures fabricated by nanoimprint lithography


    Contributors:
    Chang, A.S.P. (author) / Morton, K.J. (author) / Murphy, P. (author) / Hua Tan, (author) / Wei Wu, (author) / Chou, S.Y. (author)


    Publication date :

    2004-01-01


    Size :

    106842 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Tunable Liquid Crystal-Resonant Grating Filters using Superimposed Grating Structures Fabricated by Nanoimprint Lithography

    Lasers and Electro-optics Society (Institute of Electrical and Electronics Engineers) | British Library Conference Proceedings | 2004





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