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首页> 外文会议>Photonics and optoelectronics meetings;Conference on terahertz science and technology;POEM; 20081124-27;20081124-27;20081124-27; Wuhan(CN);Wuhan(CN);Wuhan(CN) >Analysis of terahertz pulse propagation through a dielectric edge
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Analysis of terahertz pulse propagation through a dielectric edge

机译：太赫兹脉冲传播通过电介质边缘的分析

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摘要

The wavelength of terahertz radiation is typically on the order of millimeters and submillimeters, and not negligible compared to the sizes of the optical components and the sample structure. Diffraction and scattering effects will be prominent in this situation, yielding spatiotemporal reshaping of terahertz pulse during its propagation. One representative example involves the propagation of a focused terahertz beam through a dielectric edge, which is frequently encountered in terahertz pulsed imaging. In this paper, we present a theoretical and experimental investigation on this edge diffraction problem. Benefiting from the presence of edge diffraction, high contrast image is likely to be obtained, which enables a weak-absorption (or transparent) object to be clearly resolved and reveals potential applications of terahertz imaging in nondestructive detection and biomedical diagnosis.
机译：太赫兹辐射的波长通常在毫米和亚毫米的数量级，并且与光学部件和样品结构的尺寸相比不可忽略。在这种情况下，衍射和散射效应将很显着，在太赫兹脉冲传播期间会产生时空整形。一个代表性示例涉及聚焦的太赫兹光束通过电介质边缘的传播，这在太赫兹脉冲成像中经常遇到。在本文中，我们提出了关于该边缘衍射问题的理论和实验研究。得益于边缘衍射的存在，很可能会获得高对比度图像，这可以使弱吸收（或透明）物体清晰分辨，并揭示太赫兹成像在无损检测和生物医学诊断中的潜在应用。

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