Title :
Time-domain measurement of group velocity in metamaterial perfect lens
Author :
Fang, Kai ; Zhang, Liwei ; Li, Fangfei ; Wang, Wusong ; Zhang, Yewen
Author_Institution :
Shanghai Key Lab. of Special Artificial Microstructure Mater. & Technol., Tongji Univ., Shanghai, China
Abstract :
The metamaterial perfect lens with DPS/DNS/DPS structure is experimentally realized by using transmission line approach. We studied the properties of metamaterial perfect lens using the time-domain method with a measurement experiment system. It is shown that the focus of the metamaterial lenses can surpassing the diffraction constraint, and the focal spot in the second DPS region has a maximum beam width, 0.34λ, under half of a guide wavelength. When a Gaussian modulated waveform is traveling in the metamaterial lens, the group velocity in the double positive region is larger than that in the double negative one.
Keywords :
Gaussian processes; lenses; light diffraction; metamaterials; time-domain analysis; DPS-DNS-DPS structure; Gaussian modulated waveform; diffraction constraint; focal spot; maximum beam width; metamaterial perfect lens; time-domain measurement; time-domain method; transmission line approach; Lenses; Metamaterials; Permittivity; Power transmission lines; Refractive index; Time domain analysis; Transmission line measurements;
Conference_Titel :
Antenna Technology (iWAT), 2011 International Workshop on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-9133-9
DOI :
10.1109/IWAT.2011.5752350
