Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4907651
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Funding
- National Instrumentation Program [2012YQ140005]
- National Natural Science Foundation of China [61275175, 61377028]
- Nature Science Foundation of Beijing [4144069]
- Science and Technology Project of Beijing Municipal Education Commission [KM201410028004]
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We report a high efficiency, broadband terahertz (THz) modulator following a study of phthalocyanine-compound organic films irradiated with an external excitation laser. Both transmission and reflection modulations of each organic/silicon bilayers were measured using THz timedomain and continuous-wave systems. For very low intensities, the experimental results show that AlClPc/Si can achieve a high modulation factor for transmission and reflection, indicating that AlClPc/Si has a superior modulation efficiency compared with the other films (CuPc and SnCl2Pc). In contrast, the strong attenuation of the transmitted and reflected THz waves revealed that a nonlinear absorption process takes place at the organic/silicon interface. (C) 2015 AIP Publishing LLC.
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