Journal of Infrared and Millimeter Waves, Volume. 42, Issue 3, 362(2023)
Broadband terahertz detector based on topological insulator heterojunction
Fig. 1. (a)The schematic diagram of the atomic structure of Bi2Te3 and GeBi4Te7 materials,(b)the schematic diagram of the energy bands of a topological insulator,(c)Raman spectra of the two materials,(d)dipole antenna simulation results
Fig. 2. (a)The schematic diagram of device structure and test system,(b)IV curve of the device,the inset is an optical micrograph of the device,(c)the schematic diagram of the response mechanism,(d)spectrogram of the photoresponse,(e)curves of photocurrent and incident light power at different bias voltages,(f)rise/fall time of the device at zero bias
Fig. 3. (a)Response current versus modulation frequency at 0.112 and 0.27 THz,(b)photoresponse current versus modulation frequency,(c)waveforms of the device at different modulation frequencies at 0.27 THz,(d)waveform diagram of the device at 0.5 THz frequency,(e)photovoltage responsivity of the device under different biases of 0.112,0.27,and 0.5 THz,(f)NEP of three incident frequencies under different bias voltages at room temperature
Fig. 4. (a)The schematic diagram of scanning imaging optical path,(b)0.5 THz imaging results
Get Citation
Copy Citation Text
Chen-Yu YAO, Li-Bo ZHANG, Ying-Dong WEI, Lin WANG, Xiao-Shuang CHEN, Wei LU. Broadband terahertz detector based on topological insulator heterojunction[J]. Journal of Infrared and Millimeter Waves, 2023, 42(3): 362
Category: Research Articles
Received: Dec. 5, 2022
Accepted: --
Published Online: Jul. 5, 2023
The Author Email: Lin WANG (wanglin@mail.sitp.ac.cn)