A Zone Plate as a Tunable Terahertz Filter |
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Authors: | FENG Hui WANG Li |
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Affiliation: | Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 |
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Abstract: | A broadband tunable terahertz filter based on a zone plate is demonstrated in our terahertz time domain spectrometer. The central bandpass frequency covers the whole spectral range of the terahertz wave emitted from a ZnTe emitter, from 0.5 THz to 2.5 THz, and can be tuned continuously by simply moving the zone plate along the terahertz beam path. The peak transmission is about 40% and the bandwidth varies from 0.16 THz to 0.25 THz at different bandpass frequencies when the aperture size is kept constant. |
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Keywords: | 42 79 Ci 41 20 Jb 42 25 Bs |
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