Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3449132
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- NWO
- FELIX staff
- EPSRC [EP/E001815/1] Funding Source: UKRI
- STFC [ST/G502539/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E001815/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/G502539/1] Funding Source: researchfish
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We demonstrate the spectral upconversion of a unipolar subpicosecond terahertz (THz) pulse, where the THz pulse is the Coulomb field of a single relativistic electron bunch. The upconversion to the optical allows remotely located detection of long wavelength and nonpropagating components of the THz spectrum, as required for ultrafast electron bunch diagnostics. The upconversion of quasimonochromatic THz radiation has also been demonstrated, allowing the observation of distinct sum- and difference-frequency mixing components in the spectrum. Polarization dependence of first and second order sidebands at omega(opt) +/- omega(THz), and omega(opt) +/- 2 omega(THz), respectively, confirms the chi((2)) frequency mixing mechanism. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3449132]
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