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14 June 2019 Terahertz confocal microscopy with an injection-seeded terahertz parametric generator
Weipeng Kong, Zeyu Li, Guangbin Li, Qiang Yan, Mingrui Zou, Xun Zhou, Yu Qin
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Optical Engineering, Vol. 58, Issue 6, 060503 (June 2019). https://doi.org/10.1117/1.OE.58.6.060503
Abstract
We report on the implementation of a confocal microscopy system based on an injection-seeded terahertz parametric generator working at 1.76 THz. The system has a fairly reliable long-term stable operation with pulse energy fluctuations <5  %  . We experimentally demonstrate a subwavelength lateral resolution of 158  μm, corresponding to 0.93λ. We also demonstrate the capability of resolving overlapping objects at the different longitudinal surfaces by imaging a designed sample. This is the first detailed demonstration of confocal microscopy based on a THz parametric source, which is helpful for the practical application of THz imaging technology.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Weipeng Kong, Zeyu Li, Guangbin Li, Qiang Yan, Mingrui Zou, Xun Zhou, and Yu Qin "Terahertz confocal microscopy with an injection-seeded terahertz parametric generator," Optical Engineering 58(6), 060503 (14 June 2019). https://doi.org/10.1117/1.OE.58.6.060503
Received: 3 April 2019; Accepted: 29 May 2019; Published: 14 June 2019
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Cited by 3 scholarly publications.
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KEYWORDS
Terahertz radiation
Confocal microscopy
Lithium
Microscopes
Sensors
Mirrors
Gas lasers
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