Tunable and reconfigurable terahertz (THz) devices such as modulators/variable attenuators, tunable filters, coded apertures, phase shifters and high-level switches (e.g., DPDT) that are required for advanced imaging and adaptive wireless communication applications are challenging to realize. We report a promising approach to develop the above THz devices based on spatially-resolved optical modulation (SROM) using photo-induced (PI) free carriers in semiconductors. The fundamental mechanism for this approach will first be introduced followed by prototype demonstrations for reconfigurable coded-aperture imaging masks, beam steering/forming antennas and waveguide-based tunable attenuators. The potential to develop more advanced tunable/reconfigurable THz devices (e.g., tunable delay lines, SPDT, DPDT switches) using optically-controlled waveguide architectures such as PI electromagnetic band gap (EBG) structures and dynamically-reconfigurable PI substrate-integrated waveguides (SIWs) will also be discussed on the basis of performance-improved SROM using the so-called mesa-array technique.


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    Title :

    Optically controlled tunable and reconfigurable Terahertz devices


    Contributors:
    Ren, Jun (author) / Shams, Md. Itrat Bin (author) / Jiang, Zhenguo (author) / Fay, Patrick (author) / Liu, Lei (author)


    Publication date :

    2017-06-01


    Size :

    517761 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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