TY - JOUR
T1 - Optoelectronic-based high-efficiency quasi-CW terahertz imaging
AU - Lu, Ja Yu
AU - Chang, Hsu Hao
AU - Chen, Li Jin
AU - Tien, Ming Chun
AU - Sun, Chi Kuang
N1 - Funding Information:
Manuscript received April 29, 2005; revised July 26, 2005. This work was supported by National Science Council of Taiwan under Grant NSC93-2215-E-002-040. The authors are with the Department of Electrical Engineering and Graduate Institute of Electro-Optical Engineering, National Taiwan University, Taipei 10617, Taiwan, R.O.C. (e-mail: [email protected]). Digital Object Identifier 10.1109/LPT.2005.857602 Fig. 1. Schematic diagram of the quasi-CW THz imaging system. BS: beam splitter. Solid line: excitation beam. Dashed line: radiated quasi-CW THz beam. Inset shows the top view of the photonic transmitter.
PY - 2005/11
Y1 - 2005/11
N2 - We demonstrate an optoelectronic-based high-efficiency terahertz (THz) imaging system. Based on a micron-sized photonic transmitter operating at room temperature, an improved signal-to-noise ratio with a reasonable spatial resolution can be achieved. Biomedical THz imaging was demonstrated with a dried seahorse and a fresh flower, which were hidden in plastic sample holders and were invisible. Tissue and water distributions of distinct regions of the bio-samples were clearly resolved, showing the high imaging contrasts of the demonstrated system. These results reveal the possibility to construct a high-sensitivity THz imaging system with less than 1-mW optical excitation.
AB - We demonstrate an optoelectronic-based high-efficiency terahertz (THz) imaging system. Based on a micron-sized photonic transmitter operating at room temperature, an improved signal-to-noise ratio with a reasonable spatial resolution can be achieved. Biomedical THz imaging was demonstrated with a dried seahorse and a fresh flower, which were hidden in plastic sample holders and were invisible. Tissue and water distributions of distinct regions of the bio-samples were clearly resolved, showing the high imaging contrasts of the demonstrated system. These results reveal the possibility to construct a high-sensitivity THz imaging system with less than 1-mW optical excitation.
UR - http://www.scopus.com/inward/record.url?scp=27744519148&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27744519148&partnerID=8YFLogxK
U2 - 10.1109/LPT.2005.857602
DO - 10.1109/LPT.2005.857602
M3 - Article
AN - SCOPUS:27744519148
SN - 1041-1135
VL - 17
SP - 2406
EP - 2408
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 11
ER -