Compressed Sensing in a Fully Non-Mechanical 350 GHz Imaging Setting

Augustin, Sven; Hieronymus, Jan; Jung, Peter; Hübers, Heinz‐Wilhelm

doi:10.1007/s10762-014-0141-5

Cited by 29 publications

(16 citation statements)

References 39 publications

(29 reference statements)

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“…Since then, other techniques have been used to create reconfigurable masks. In [109] and [110], spatially distributed photo excitation of charge carrier density in a semiconductor wafer was utilized to alter the THz attenuation. In [111], Watts et al report on a THz SPC with an electronically programmable metamaterial mask.…”

Section: B Imaging With Compressed Sensingmentioning

confidence: 99%

Terahertz Imaging and Sensing Applications With Silicon-Based Technologies

Hillger

Grzyb

Jain

et al. 2019

IEEE Trans. THz Sci. Technol.

290

108

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Traditional terahertz (THz) equipment faces major obstacles in providing the system cost and compactness necessary for widespread deployment of THz applications. Because of this, the field of THz integrated circuit (THz IC) design in CMOS and SiGe HBT technologies has surged in the last decade. An interplay of advances in silicon process technology, design technique, and microelectronic packaging promises to narrow the gap between the requirements and the reality of system cost and performance of THz components. Furthermore, the scalability, reconfigurability, and signal processing features of silicon technology have initiated research in complex THz ICs that expand the functionality of THz systems; this has enabled new applications, methods, and algorithms. This paper reviews the progress in THz IC research and investigates several realizations of THz imaging and sensing applications with silicon-based components regarding their motivation, system performance, and challenges. THz computed tomography, broadband multicolor imaging, high-resolution FMCW radar imaging, subwavelength resolution near-field imaging, and compressed sensing are presented.

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Section: B Imaging With Compressed Sensingmentioning

confidence: 99%

Terahertz Imaging and Sensing Applications With Silicon-Based Technologies

Hillger

Grzyb

Jain

et al. 2019

IEEE Trans. THz Sci. Technol.

290

108

View full text Add to dashboard Cite

show abstract

“…Such technique was used to spatially map the front of the THz beam and also showed the possibility of tracking moving objects. S. Augustin et al 51 employed a liquid crystal-based SLM to impress the pattern shapes onto the optical beam coming from a halogen lamp. Silicon was substituted with germanium for photo-modulation, since the lower bandgap of the latter allowed the use of less photo-modulating power.…”

Section: All-optical Free-carrier-based Modulatorsmentioning

confidence: 99%

Single-pixel terahertz imaging: a review

Zanotto

Piccoli

Morandotti

et al. 2020

Opto-Electronic Advances

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This paper is devoted to reviewing the results achieved so far in the application of the single-pixel imaging technique to terahertz (THz) systems. The use of THz radiation for imaging purposes has been largely explored in the last twenty years, due to the unique capabilities of this kind of radiation in interrogating material properties. However, THz imaging systems are still limited by the long acquisition time required to reconstruct the object image and significant efforts have been recently directed to overcome this drawback. One of the most promising approaches in this sense is the so-called "single-pixel" imaging, which in general enables image reconstruction by patterning the beam probing the object and measuring the total transmission (or reflection) with a single-pixel detector (i.e., with no spatial resolution). The main advantages of such technique are that i) no bulky moving parts are required to raster-scan the object and ii) compressed sensing (CS) algorithms, which allow an appropriate reconstruction of the image with an incomplete set of measurements, can be successfully implemented. Overall, this can result in a reduction of the acquisition time. In this review, we cover the experimental solutions proposed to implement such imaging technique at THz frequencies, as well as some practical uses for typical THz applications.

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“…Following the initial idea various configurations have been realized since then [8]- [11]. In these systems THz sources such as a THz time-domain system [8], [11], a multiplier source [10] or an incandescent light source [9] have been used in combination with a single detector pixel. To achieve the dynamic change of the patterns an optical modulation technique is combined with a SLM for visible light.…”

Section: Introductionmentioning

confidence: 99%

Terahertz Dynamic Aperture Imaging at Standoff Distances Using a Compressed Sensing Protocol

Augustin¹,

Jung²,

Frohmann³

et al. 2019

IEEE Trans. THz Sci. Technol.

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In this text, results of a 0.35 terahertz (THz) dynamic aperture imaging approach are presented. The experiments use an optical modulation approach and a single pixel detector at a stand-off imaging distance of ≈1 m. The optical modulation creates dynamic apertures of 5 cm diameter with ≈2000 individually controllable elements. An optical modulation approach is used here for the first time at a large far-field distance, for the investigation of various test targets in a fieldof-view of 8 x 8 cm. The results highlight the versatility of this modulation technique and show that this imaging paradigm is applicable even at large far-field distances. It proves the feasibility of this imaging approach for potential applications like stand-off security imaging or far field THz microscopy.

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Compressed Sensing in a Fully Non-Mechanical 350 GHz Imaging Setting

Cited by 29 publications

References 39 publications

Terahertz Imaging and Sensing Applications With Silicon-Based Technologies

Terahertz Imaging and Sensing Applications With Silicon-Based Technologies

Single-pixel terahertz imaging: a review

Terahertz Dynamic Aperture Imaging at Standoff Distances Using a Compressed Sensing Protocol

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