[1
]Department of Electrical and Computer Engineering, University of Nebraska-Lincoln,
Lincoln, Nebraska 68588, USA
[2
]Terahertz Materials Analysis Center, Department of Physics, Chemistry and Biology
(IFM), Linköping University, SE 58183 Linköping, Sweden
[3
]Institute of Global Innovation Research, Tokyo University of Agriculture and Technology,
Koganei, Tokyo 184-8588, Japan
[4
]Department of Applied Chemistry, Tokyo University of Agriculture and Technology, Koganei,
Tokyo 184-8588, Japan
[5
]Tamura Corporation, Sayama, Saitama 350-1328, Japan
[6
]National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795,
Japan
[7
]Leibniz Institute for Polymer Research, 01069 Dresden, Germany