Abstract
Since Yen et al. experimentally demonstrated magnetic resonance using array of split-ring resonator (SRR) metamaterials (MMs) in terahertz (THz) frequency range [1], numerous studies have been carried out. To control MM response by optical means is one of the actively studied approaches for the realization of THz wave modulator. Recently, Yoo et al. reported that photo-induced modulation of THz transmission through Si were drastically enhanced by depositing thin layer of organic conjugated material, copper phthalocyanine (CuPc) [2]. Photo-induced metallization due to charge transfer from Si to CuPc plays crucial role. Here we demonstrate photo-induced effective modulation of resonant characteristics of SRR array fabricated on CuPc-coated Si [3]. Our findings may lead to the development of novel THz devices.
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