Terahertz emission from lateral surge currents and suppression of dipoles under a metal mask

Pulsed broadband terahertz emission can be observed from lateral diffusion currents near the surface of a partially metallic masked semiconductor after ultrafast photoexcitation. We present a theoretical mechanism for the emission based on diffusion and dipole suppression under the metal mask with s...

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Bibliographic Details
Published in2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) pp. 1 - 2
Main Authors Barnes, Mark E., McBryde, Duncan, Berry, Sam A., Gow, Paul C., Daniell, Geoff J., Beere, Harvey E., Ritchie, David A., Apostolopoulos, Vasilis
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2013
Subjects
Antenna measurements
Dipole antennas
Measurement by laser beam
Metals
Optical surface waves
Semiconductor device measurement
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Summary:Pulsed broadband terahertz emission can be observed from lateral diffusion currents near the surface of a partially metallic masked semiconductor after ultrafast photoexcitation. We present a theoretical mechanism for the emission based on diffusion and dipole suppression under the metal mask with supporting experimental and theoretical evidence.
ISSN:2162-2027
DOI:10.1109/IRMMW-THz.2013.6665434