Abstract-Terahertz Time-Domain Spectroscopy of 0.73Pb(Mg1/3Nb2/3)O3–0.27PbTiO3 Single Crystal

1. ^*

1. Zehui Yong¹, 
2. Lianxing He^1,2, 
3. Bo Li^1,3,
4. Mingzhe Hu^1,4, 
5. Chi Hang Lam¹ and
6. Yu Wang^1,*

Article first published online: 12 MAY 2014

DOI: 10.1111/jace.12958

http://onlinelibrary.wiley.com/doi/10.1111/jace.12958/abstract

© 2014 The American Ceramic Society

Lead magnesium niobate titanate is an important ferroelectric material. In this study, the terahertz (THz) transmission properties of a 0.73Pb(Mg_1/3Nb_2/3)O₃–0.27PbTiO₃ single crystal were investigated using a time-domain spectroscopy method. Complex refractive index and dielectric dispersion functions were determined from the amplitude and phase information derived from time-domain responses. Based on calculations, it was concluded that the room-temperature dielectric constant of the single crystal equal to ~30 at 1 THz. This result could be a useful reference for development of ferroelectric-material-based THz components and devices.

Abstract-An isotropy dual-band terahertz metamaterial

1. Biao Li, 
2. Lianxing He, 
3. Yingzeng Yin,
4. Wanyi Guo, 
5. Xiaowei Sun

http://scienceindex.com/stories/2975984/An_isotropy_dualband_terahertz_metamaterial.html

An isotropy terahertz (THz) metamaterial for dual-band operation is designed and fabricated. The proposed metamaterial is composed of periodically arranged double metallic rings, and negative permittivity is obtained in 298–388 GHz and 652–780 GHz bands. Transmission and reflection characteristics of the proposed structure are simulated using Ansoft High Frequency Structure Simulator. The designed sample is fabricated on a gallium arsenide layer, and experiments are performed in THz time-domain spectroscopy. The experimental results agree well with the simulations