Proposal for generation of high-intensity monochromatic Cherenkov radiation in THz range by femtosecond electron bunches in impurity-doped semiconductor tube

A novel method to generate high-power THz radiation is proposed. If a beam with a bunch length on the order of 100 fs is injected into an electron–hole plasma of a semiconductor with a plasma frequency on the order of THz, THz wake fields are coherently generated. If the beam moves on the axis of a...

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Bibliographic Details
Published in:Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 2011-12, Vol.80 (12), p.1323-1326
Main Authors: Kan, Koichi, Yang, Jinfeng, Norizawa, Kimihiro, Kondoh, Takafumi, Yoshida, Yoichi, Ogata, Atsushi
Format: Article
Language:English
Subjects:
Attosecond electron bunches
Beams (radiation)
Cherenkov radiation
Coherent radiation
Femtosecond
Frequency spectrum
Impurity-doped semiconductor
Monochromatic radiation
Plasma (physics)
Semiconductors
THz radiation
Tubes
Wakes
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Summary:A novel method to generate high-power THz radiation is proposed. If a beam with a bunch length on the order of 100 fs is injected into an electron–hole plasma of a semiconductor with a plasma frequency on the order of THz, THz wake fields are coherently generated. If the beam moves on the axis of a hollow tube covered by a metal, the frequency spectrum of the radiation is composed of discrete components. Monochromatic radiation is obtained by making only the lowest frequency component coherent. ► We propose Generation of coherent THz Cherenkov radiation. ► Femtosecond electron bunches move on the axis of a semiconductor tube. ► The plasma frequency of the semiconductor is close to the radiation frequency. ► The coherent condition gives a quasi-monochromatic radiation.
ISSN:0969-806X
1879-0895
DOI:10.1016/j.radphyschem.2011.07.008