Electromagnetic wave generator and optical shutter using the same
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United States of America Patent
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Jul 21, 2015
Grant Date -
Dec 13, 2012
app pub date -
Jun 11, 2012
filing date -
Jun 10, 2011
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Abstract
An electromagnetic wave generator for outputting wideband electromagnetic waves, including terahertz (THz) band waves, and for controlling wavelengths of the output electromagnetic waves and an optical shutter are provided. The electromagnetic wave generator includes two electrodes that separately face each other, a chargeable particle disposed between the two electrodes, and a chamber disposed to surround the chargeable particle between the two electrodes. When DC voltages are applied to the two electrodes to generate an electric field between the two electrodes, the chargeable particle may be charged. Then, the chargeable particle reciprocates between the two electrodes to generate the electromagnetic waves. A wavelength of the output electromagnetic wave may be controlled by adjusting a potential difference between the two electrodes.
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