Abstract:The first terahertz scanning near field optical microscope with an attenuated total internal reflec tion module and a free electron laser (FEL) as the radiation source was developed. A scanning system with positioning using a confocal sensor with chromatic coding and a surface-subwavelength probe touch sensor were developed and tested. A new technique for sensing the distance between the probe and a conducting sur face via corona discharge current measurement was developed. A specific lock in system for detect… Show more
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