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Near-Field THz Imaging and Spectroscopy Using a Multiple Subwavelength Aperture Modulator

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2 Author(s)
Szelc, J. ; Infrared Sci. & Technol. Group, Univ. of Southampton, Southampton, UK ; Rutt, H.

We present a near-field, simultaneous multiple pixel subwavelength THz transmission imaging device based on a solid-state THz spatial modulator. Frequency-division multiplexing is used to acquire multiple pixels simultaneously. The modulator was used to acquire THz transmission images with λ/4 resolution at 118 μm. The image acquisition speed is 16 times greater than that of a comparable single-aperture subwavelength imaging technique. Additionally, spectroscopic THz imaging with subwavelength spatial resolution can be accomplished with the modulator, and the technique is scalable to at least 100 simultaneous pixels.

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Terahertz Science and Technology, IEEE Transactions on  (Volume:3 ,  Issue: 2 )