Review of THz near-field imaging

doi:10.11972/j.issn.1001-9014.2016.03.009

Home > Archive>Volume 35, Issue 3, 2016 >300-309. DOI:10.11972/j.issn.1001-9014.2016.03.009

Review of THz near-field imaging
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                        10.11972/j.issn.1001-9014.2016.03.009
                    
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Affiliation:Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronics Information Technology (Ministry of Education), College of Precision Instrument and Optoelectronics Engineering, Tianjin University,Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronics Information Technology (Ministry of Education), College of Precision Instrument and Optoelectronics Engineering, Tianjin University,Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronics Information Technology (Ministry of Education), College of Precision Instrument and Optoelectronics Engineering, Tianjin University,Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronics Information Technology (Ministry of Education), College of Precision Instrument and Optoelectronics Engineering, Tianjin University,Institute of Laser and Optoelectronics, Key Laboratory of Optoelectronics Information Technology (Ministry of Education), College of Precision Instrument and Optoelectronics Engineering, Tianjin University
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Abstract:

As the extension of optical and microwave imaging, THz imaging has now attracted broad attention and showed many unique advantages in areas such as characterizations of semiconductor materials, diagnoses of biological tissues, nondestructive tests and security inspections. According to the diffraction limit, traditional THz imaging is subjected to the shortcoming of its long wavelength that results in a low spatial resolution. However, THz near-field imaging is one of the research highlights to surpass the limit and obtain images with spatial resolutions up to sub-micrometer or even nanometer scale. In this paper, the schemes and basic principles of THz near-field imaging were introduced. Then, four kinds of typical methods, as well as their recent progress and existing problems, were reviewed in detail, including aperture based, tip based, sub-wavelength THz source based, and microstructure control based techniques. Finally, developing prospects were discussed.

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LIU Hong-Xiang, YAO Jian-Quan, WANG Yu-Ye, XU De-Gang, HE Yi-Xin. Review of THz near-field imaging[J]. Journal of Infrared and Millimeter Waves,2016,35(3):300~309

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Received:August 03,2015
Revised:August 03,2015
Adopted:September 09,2015
Online: July 28,2016
Published: July 28,2016

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