High-efficiency THz modulator based on phthalocyanine-compound organic films

作者：He, Ting; Zhang, Bo^*; Shen, Jingling; Zang, Mengdi; Chen, Tianji; Hu, Yufeng; Hou, Yanbing

来源：Applied Physics Letters, 2015, 106(5): 053303.

DOI：10.1063/1.4907651

• THIN-FILMS
• TERAHERTZ
• RADIATION

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.

• 出版日期2015-2-2
• 单位首都师范大学; 北京交通大学