Acta Photonica Sinica, Volume. 45, Issue 2, 224001(2016)
Control of the Propagation Distance of Surface Plasmons Wave in Terahertz Spectrum
With the cutoff frequency of the surface wave in terahertz, the gradient depth of the metal grating was designed, and find that the cutoff frequency is 0.6THz when the depth of the grating is 60 μm and 1.1 THz is nearly corresponding to the 120 μm. At the same time, the temperature controller semiconductor grating was designed. According to the dispersion characteristic of the semiconductor material (InSb) in terahertz region, the experience formula of the carrier concentration and mobility; equivalent medium theory of grating structure, it is shown that the propagation distance is proportion to the temperature in 270~300 K, which the propagation distance in 300 K is 2~3 times than the 270 K.
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WANG Wenbo, GUO Baoshan. Control of the Propagation Distance of Surface Plasmons Wave in Terahertz Spectrum[J]. Acta Photonica Sinica, 2016, 45(2): 224001
Received: Sep. 16, 2015
Accepted: --
Published Online: Apr. 1, 2016
The Author Email: Wenbo WANG (1041591321@qq.com)