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Controlling THz Wave Transmission Through Organic Copper Phthalocyanine (CuPc) Films on Si by Optical Excitation

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We show that transmission of THz waves through an organic copper phthalocyanine (CuPc) film on a Si wafer can be controlled by optical excitation. The carriers excited in silicon are injected into a CuPc film and transport along well-ordered direction of a CuPc film, resulting in making a CuPc film metallic and decreasing the THz transmission. Modulation efficiency depends on the phases of CuPc films. CuPc film/Si layers can be exploited for THz optical modulators.

© 2011 Optical Society of America

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