TST, Vol. 5, No. 3, PP. 114-123
(Invited paper) Terahertz Imaging on Subcutaneous Tissues and Liver Inflamed by Liver Cancer Cells
C. H. Zhang 1, 4, G. F. Zhao 2, B. B. Jin 1*, Y. Y. Hou 2*, H. H. Jia 3, J. Chen 1 and P. H. Wu 1*
1 Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
2 Immunology and Reproductive Biology Lab, Medical School & State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210093, China
3 Currently National University of Defense Technology, Changsha, 410008, China
4 Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
*1 Email: bbjin@nju.edu.cn, *2 yayihou@nju.edu.cn & *1 phwu@nju.edu.cn
(Received June 14, 2012)
Abstract: Terahertz (THz) imaging has a number of potential applications in medical imaging and diagnosis. Here, we demonstrate the THz images on the diseased and the corresponding normal tissues from 14 samples. The liver cancer cells are planted by subcutaneous injection into BALB/c which share high degree homology with human. Subcutaneous tumors and nearby normal tissues as well as the inflamed livers and normal liver tissues are achieved after 7 days, 14 days and 21 days injection. Terahertz time-domain spectroscopy (TDS) is used to image these tissues. We have found that at certain frequency range, most tumors and serious inflamed livers have lower absorption than normal tissues, which mean THz imaging could obviously distinguish the tumors and normal tissues, serious inflamed and normal livers, but could not obviously distinguish the grade of tumors and inflammation.
Keywords: THz imaging, biological tissue, absorption coefficient
doi: 10.11906/TST.114-123.2012.09.10
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TST, Vol. 5, No. 3, PP. 124-130
(Invited Paper) The New Terahertz Radiation and Detection Source Based on Organic Electro-Optic Poling Polymer
Shuhui Bo 1*, Zhuo Chen 1, Jieyun Wu 1, 2, Xinhou Liu 1, Zhen Zhen 1
1 Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
2 Graduated University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
* Email: boshuhui@mail.ipc.ac.cn
(Received September 28, 2012)
Abstract: Due to the unique properties of terahertz waves, terahertz technology has been used in biomedicine, food inspection, environmental monitoring, security counter-terrorism and other fields concerning national economic and social development. High power broadband terahertz radiation and detection source material is needed to solve related problems urgently as the base of terahertz technology. This paper proposed to use a new kind of terahertz radiation and detection source material——simple processing electro-optic (EO) poling polymers with big nonlinear coefficient and thermal stability, which can replace the inorganic crystal by optical rectification effect for radiation and strong EO activity for detection. Through the research of polymeric EO performance, we designed and fabricated series of chromophores and polymers with different properties. By adjusting the type and concentration of chromophores, the combination of chromophores with polymer and the polarization process, we can obtain a high EO activity, high thermal stability and low dielectric constant polymer materials. We also use some advanced technology and theory to study the various factors affecting terahertz radiation efficiency.
Keywords: Terahertz radiation and detection, Electro-optic poling polymer, Electro-optic activity, Organic materials.
doi: 10.11906/TST.124-130.2012.09.11
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TST, Vol. 5, No. 3, PP. 131-143
(Invited Overview) Terahertz Functional Devices Based on Photonic Crystal and Surface Plasmon Polaritons
Dongxiao Yang 1, 2*, Tao Li 1, Lei Rao 1, Song Xia 1, Le Zhang 1
1 Zhejiang University, Department of Information Science and Electronic Engineering, 310027 Hangzhou, PR China
2 Zhejiang University, Research Center for Terahertz Technology, Hangzhou 310027, PR China
* Email: yangdx@zju.edu.cn
(Received September 28, 2012)
Abstract: Terahertz functional devices are as important as sources and detectors in many terahertz systems. Photonic crystal structures designed with band gaps and surface plasmon polaritons on corrugated metallic surfaces are two excellent ways to control the propagation of terahertz wave, which is suitable for designing and fabricating various kinds of functional devices in terahertz region. Some typical terahertz devices based on photonic crystals and surface plasmon polaritons are investigated in this paper, such as terahertz wideband filter, terahertz band-stop filter, terahertz waveguide, terahertz resonant cavity.
Keywords: Terahertz devices, Photonic crystal, Slab, Surface plasmon polaritons
doi: 10.11906/TST.131-143.2012.09.12
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TST, Vol. 5, No. 3, PP. 144-152
(Invited Paper) Report on TRDNC and TST Updating in SICAST 2011
Isabelle You *
Editorial Office of the International Online Journal of Terahertz Science and Technology (TST)
University of Electronic Science and Technology of China，Chengdu, Sichuan, P. R. China, 610054
* Email: isabelleyou@thznetwork.org.cn
(Received March 28, 2012)
Abstract: The latest updating of the website Terahertz Research & Development Network of China (TRDNC) and the international online Journal Terahertz Science & Technology (TST) were presented and reported in Shenzhen International Conference on Advanced Science and Technology (SICAST) 2011. Newly achieved functions and merits were also illustrated and analyzed with charts and tables so as to fully prepare TRDNC and TST to play a more and more innovative, informative, insightful and instructive role in the future development of Terahertz science and technology at home and abroad.
Keywords: TRDNC, TST, Updating.
doi: 10.11906/TST.144-152.2012.09.13
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