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The generation and detection of intense THz radiation has drawn a great attention recently. The dramatically enhanced energy, peak power, and peak electric field of the coherent THz radiation can be generated from the coherent superposition of the radiated fields emitted by ultrafast electron bunches. The fs-THz beamline construction program at PAL (Pohang Accelerator Laboratory), which is scheduled...
When particles are smaller than wavelength of incident light, the light can be considered as static field. We calculate the electric field enhancement by plasmon in the gap between two paralleled metallic nano wires.
Many routing protocols have been proposed for sensor networks where energy awareness and reliability are essential design issues. This paper proposes an energy-aware data gathering method called energy-aware tree routing (ETR) in wireless sensor networks. The proposed scheme relates to reliable and energy efficient data routing by selecting a data transmission path in consideration of residual energy...
A 60 MeV electron linac for the source of coherent fs-THz pulses is under construction at PAL, Korea. The electron bunches produced from the photocathode rf gun are accelerated to 60 MeV and compressed down to several tens of femtosecond in a chicane type bunch compressor. Then the relativistic electron bunches are used to generate intense fs-THz pulses by coherent transition radiation (CTR). The...
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