期刊
OPTICS LETTERS
卷 37, 期 13, 页码 2706-2708出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.37.002706
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- Ministry of Education, Culture, Sports, Science and Technology, Japan [22684013, 24656054]
- Keio Leading-edge Laboratory of Science and Technology (KLL)
- Keio Engineering Foundation
- Grants-in-Aid for Scientific Research [22684013, 24656054] Funding Source: KAKEN
We demonstrate a method for substantially improving the axial resolution of terahertz time-of-flight measurements by analyzing the time-dependent polarization direction of an elliptically polarized single-cycle terahertz electromagnetic (T-ray) pulse. We show that, at its most sensitive, the technique has an axial resolution of similar to lambda/1000 (<1 mu m) with a subsecond measurement time, and very clear T-ray topographic images are obtained. Such a very high axial resolution of the T-ray topography opens the way for novel industrial and biomedical applications such as fine metalworking and corneal inspection in a safe manner. (C) 2012 Optical Society of America
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