Sub-wavelength terahertz imaging through optical rectification

被引：0
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作者：
Federico Sanjuan
Gwenaël Gaborit
Jean-Louis Coutaz
机构：
[1] IMEP-LAHC,
[2] UMR CNRS 5130,undefined
[3] University Savoie Mont-Blanc,undefined
[4] Kapteos,undefined
[5] 354 voie Magellan,undefined
来源：
Scientific Reports | / 8卷
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摘要：
We record a sub-wavelength terahertz image of a caster sugar grain thanks to optical rectification in the sample excited with a femtosecond laser beam. The lateral spatial resolution of this technique is given by the laser spot size at the sample and here its measured value is 50 μm, i.e. ~λ/12. We give an estimation of the ultimate resolution that could be achieved with this method.
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