title: Electro-optic measurement of terahertz pulse energy distribution.
abstract: An accurate and direct measurement of the energy distribution of a low repetition rate terahertz electromagnetic pulse is challenging because of the lack of sensitive detectors in this spectral range. In this paper, we show how the total energy and energy density distribution of a terahertz electromagnetic pulse can be determined by directly measuring the absolute electric field amplitude and beam energy density distribution using electro-optic detection. This method has potential use as a routine method of measuring the energy density of terahertz pulses that could be applied to evaluating future high power terahertz sources, terahertz imaging, and spatially and temporarily resolved pump-probe experiments.
authors: National Electromagnetic Scattering Laboratory, Beijing 100854, People's Republic of China. jinhaisun@gmail.com
authors: J H
authors: JH
authors: Sun
authors: J G
authors: JG
authors: Gallacher
authors: G J H
authors: GJ
authors: Brussaard
authors: N
authors: N
authors: Lemos
authors: R
authors: R
authors: Issac
authors: Z X
authors: ZX
authors: Huang
authors: J M
authors: JM
authors: Dias
authors: D A
authors: DA
authors: Jaroszynski
mesh_terms: D002138:Calibration; D004560:Electricity; D055620:Optical Phenomena; D011827:Radiation; D013997:Time Factors