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Temporal and Spectral Properties of Subcycle THz Pulses in Near-Field Zone |
| YANG Yu-Ping;YAN Wei;XU Xin-Long;SHI Yu-Lei;WANG Li |
| Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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YANG Yu-Ping, YAN Wei, XU Xin-Long et al 2005 Chin. Phys. Lett. 22 1401-1404 |
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Abstract In a novel generation and detection configuration of terahertz (THz) radiation, we investigate experimentally and numerically the properties of sub-cycle THz pulses in the near field. It is found that the sub-cycle THz pulses experience significant spectral and temporal deformation in the near-field zone. The variations of both the pulse waveform and spectral distribution of the THz electric field are clearly observed in our experiments when the spot size of source is changed. Numerical simulations based on Gaussian distribution are performed to explain the details of the data and lead to an excellent agreement with the experimental results.
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41.20.Jb
37.Uv
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Published: 01 June 2005
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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68
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(Surfaces and interfaces; thin films and nanosystems (structure and nonelectronic properties))
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37.Uv
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