Quizzed article | REF: E4062 V1

Sources of terahertz electromagnétic radiations

Author: Jean-Louis COUTAZ

Publication date: July 10, 2022 | Lire en français

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    6. Optical pulse excitation sources

    6.1 Photo-commutation

    Photo-switching is the most efficient pulse method when low-power femtosecond lasers are available. It was the driving force behind the research and development of THz technology in the late 1980s.

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    6.1.1 Photocommutator antenna principle

    A metal line is deposited on an undoped (semi-intrinsic) semiconductor substrate, which is insulating in the absence of illumination (figure 12 ). This...

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    Optical pulse excitation sources