Terahertz Real-Time Imaging Uncooled Arrays Based on Antenna-Coupled Bolometers or FET Developed at CEA-Leti

Simoens, F.; Meilhan, Jean–Baptiste; Nicolas, Jean-Alain

doi:10.1007/s10762-015-0197-x

Cited by 33 publications

(23 citation statements)

References 40 publications

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“…Furthermore, if occlusion is an issue as shown earlier (16), the region of interest may give erroneous data due to the dynamic nature of the sample and the sequential process of acquisition. One option to increase imaging speed is to synchronously acquire multiple pixels at once through the use of an array of emitters and/or detectors and there have been some significant improvements presented recently on the development of efficient microbolometer arrays for detection (44)(45)(46). However, such arrays are not suitable for time-domain imaging as they have limited ability to capture the spectral information available, and arrays of time-domain sources and detectors remain expensive and difficult to fabricate.…”

Section: Imaging Speedmentioning

confidence: 99%

Recent advances in terahertz technology for biomedical applications

Sun¹,

He²,

Li³

et al. 2017

Quant. Imaging Med. Surg.

222

113

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Terahertz instrumentation has improved significantly in recent years such that THz imaging systems have become more affordable and easier to use. THz systems can now be operated by non-THz experts greatly facilitating research into many potential applications. Due to the non-ionising nature of THz light and its high sensitivity to soft tissues, there is an increasing interest in biomedical applications including both in vivo and ex vivo studies. Additionally, research continues into understanding the origin of contrast and how to interpret terahertz biomedical images. This short review highlights some of the recent work in these areas and suggests some future research directions.

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Section: Imaging Speedmentioning

confidence: 99%

Recent advances in terahertz technology for biomedical applications

Sun¹,

He²,

Li³

et al. 2017

Quant. Imaging Med. Surg.

222

113

View full text Add to dashboard Cite

show abstract

“…In this section, the MDP values per pixel for the MB-THz-FPAs [26,31,32,34] are compared with those of other THz detectors, such as antenna-coupled CMOS-THz-FPAs [12,13,15,16,36,44] and antenna-coupled detectors based on III-V compound semiconductor technologies [18][19][20][22][23][24] . Table 2 summarizes the parameters of these THz detectors.…”

Section: Comparison Of Performances For Different Detectorsmentioning

confidence: 99%

“…Above 1 THz, there is no good detector other than the MB-THz-FPAs. Simoens, F. et al [26] analyses the performance of their MB-THz-FPA and indicates that there is still a room for improvement to reach better MDP value of ca. 10 pW at 2.5 THz.…”

Section: Comparison Of Performances For Different Detectorsmentioning

confidence: 99%

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Technology trend in real-time, uncooled image sensors for sub-THz and THz wave detection

Oda

2016

SPIE Proceedings

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The author summarizes development of uncooled microbolometer terahertz (THz) focal plane arrays (FPAs) and real-time cameras for sub-THz and THz wave detection. The array formats are 320x240 and 640x480, and the cameras have several functions, such as lock-in imaging, external-trigger imaging, image processing (pixel binning and frame integration), beam profiling and so on. The FPAs themselves are sensitive to sub-THz, THz and infrared radiations.Active imaging systems based on the imagers are described. One of them is a real-time transmission-type THz microscope which contains a THz camera and a quantum cascade laser (QCL). The other one is an active sub-THz imaging system, where a transmission imaging mode and a reflection imaging mode can be switched with one-touch operation. Strong THz emitters, such as far-infrared gas lasers and QCLs, are strongly coherent and often produce interference fringes in an image. A method of reducing the interference fringes (beam homogenizing) is described.Microbolometer FPAs developed by other groups, antenna-coupled CMOS FPA, array detectors based on GaAs high-mobility heterostructure and so on are also summarized, which operate in real-time and at room temperature. A fair method of evaluating performance of detectors with different sizes and at different wavelengths is explained and the performances of the detectors are compared.

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“…Incoherent detectors give less information about the THz radiation but are better suited for building focal plane arrays. Among the THz incoherent detectors such as bolometers [107] or Schottky barrier diodes [108], detectors based on field effect transistors (FET) [109,110,111] emerge as a key choice for cost-efficiency, low power and on-chip integration. THz imaging using CMOS FET-based detectors has been mainly performed using a single detector and mechanical scanning of the object [111,112].…”

Section: Introductionmentioning

confidence: 99%

Ultra Low Noise CMOS Image Sensors

Boukhayma

2018

Springer Theses

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Terahertz Real-Time Imaging Uncooled Arrays Based on Antenna-Coupled Bolometers or FET Developed at CEA-Leti

Cited by 33 publications

References 40 publications

Recent advances in terahertz technology for biomedical applications

Recent advances in terahertz technology for biomedical applications

Technology trend in real-time, uncooled image sensors for sub-THz and THz wave detection

Ultra Low Noise CMOS Image Sensors

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