Yuncheng Zhao,1 Yaxin Zhang,1* Shixiong Liang,2 Zhihong Feng,2 Ziqiang Yang,1*
1Terahertz Science Cooperative Innovation Center, University of Electronic Science and Technology of China
No.4, Section 2, North Jianshe Road, Chengdu, 610054, China
2 National Key Laboratory of Application Specific Integrated Circuit, Hebei Semiconductor Research Institute, Hezuo Road, Shijiazhuang, 050051, China
Nano-Micro Conference, 2017, 1, 01007
Published Online: 04 October 2017 (Abstract)
Terahertz technology promises unique applications in high speed communication, high accuracy imaging and so on . However, one major bottleneck for developing Terahertz application systems is the lack of high-performance dynamic devices for effectively manipulating the Terahertz wave. In recent years, the rapid development of two-dimensional electron gas (2DEG) devices provides a promising way to develop dynamic terahertz devices . In this paper, we combined a stagger-netlike metamaterial array with high-electron-mobility transistor (HEMT) structure to form a electronic grid-controlled THz modulator. By controlling the carrier concentration of 2DEG, the mode conversion between two kinds of dipolar resonances has been realized. Modulation depth of this device can reach up to 94%. More importantly, in the dynamic test, 600 MHz sinusoidal signals was received by a THz detector. It may provide a way to achieve effective active devices in THz wireless communication system.
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 Yaxin Zhang; Shen Qiao; Shixiong Liang; Zhenhua Wu; Ziqiang Yang; Zhihong Feng; Han Sun; Yucong Zhou; Linlin Sun; Zhi Chen; Xianbing Zou; Bo Zhang; Jianhao Hu; Shaoqian Li; Qin Chen; Ling Li; Gaiqi Xu; Yuncheng Zhao; Shenggang Liu, Gbps Terahertz External Modulator Based on a Composite Metamaterial with a Double-Channel Heterostructure. Nano Letters, 15, 3501-3506 (2015). doi:10.1021/acs.nanolett.5b00869
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