Infrared and Laser Engineering, Volume. 44, Issue 6, 1832(2015)
Influence of temperature on resonant properties in terahertz subwavelength metal structures
By using terahertz time domain spectroscopy(THz-TDS), the transmission and resonance properties of terahertz subwavelength metal structures at different temperatures were studied. The transmission of "U"- and "E"-shaped structures decreased gradually with temperature increasing from 80 K to 380 K. Meanwhile, the low resonance frequency showed a slight red-shift. Through the study of temperature-dependent transmission spectra at resonance and non-resonance regions, the phenomenon of transmission decreasing was attributed to the increasing of carrier concentration in GaAs substrate. The weakened resonant strength originated from the resonate quench by temperature-generated carriers in substrate. The red-shift was due to the increase of refractive index. The investigation could provide some meaningful guides in pratical application of terahertz functional devices.
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Wu A′ni, Li Chenyu, Zhou Qingli, Liu Jianfeng, Sun Huijuan, Yang Zhou, Zhang Cunlin. Influence of temperature on resonant properties in terahertz subwavelength metal structures[J]. Infrared and Laser Engineering, 2015, 44(6): 1832
Category: THz 技术及应用
Received: Oct. 11, 2014
Accepted: Nov. 20, 2014
Published Online: Jan. 26, 2016
The Author Email: A′ni Wu (wwuani1989@163.com)
CSTR:32186.14.