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Terahertz spatial sampling with subwavelength accuracy

Yan Peng1, Yiming Zhu1, Min Gu1

  • 1Terahertz Technology Innovation Research Institute, Shanghai Key Lab of Modern Optical System, Terahertz Science Cooperative Innovation Center, University of Shanghai for Science and Technology, 200093 Shanghai, People's Republic of China.

Light, Science & Applications
|October 25, 2019
PubMed

Keywords:
Applied opticsOptical techniques

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Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
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