A5047492744- Terahertz technology and applications
- Superconducting and THz Device Technology
- Photonic and Optical Devices
- Radio Frequency Integrated Circuit Design
- Microwave Engineering and Waveguides
- Near-Field Optical Microscopy
- AI in cancer detection
- Microwave and Dielectric Measurement Techniques
- Semiconductor Quantum Structures and Devices
- Advanced Power Amplifier Design
- Advanced Sensor and Energy Harvesting Materials
- Spectroscopy and Laser Applications
- Analog and Mixed-Signal Circuit Design
- GaN-based semiconductor devices and materials
- Millimeter-Wave Propagation and Modeling
- Gene expression and cancer classification
- Innovative Energy Harvesting Technologies
- Infrared Thermography in Medicine
- Semiconductor materials and devices
- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Advanced Fluorescence Microscopy Techniques
- Photonic Crystals and Applications
- VLSI and Analog Circuit Testing
- Advanced Optical Imaging Technologies
University of Wuppertal
2015-2024
Institut Bergonié
2021
Massachusetts Institute of Technology
2019
Intel (Germany)
2014
Traditional terahertz (THz) equipment faces major obstacles in providing the system cost and compactness necessary for widespread deployment of THz applications. Because this, field integrated circuit (THz IC) design CMOS SiGe HBT technologies has surged last decade. An interplay advances silicon process technology, technique, microelectronic packaging promises to narrow gap between requirements reality performance components. Furthermore, scalability, reconfigurability, signal processing...
The failure to accurately define tumor margins during breast conserving surgery (BCS) results in a 20% re-excision rate. present paper reports the investigation evaluate potential of terahertz imaging for tissue recognition within under-explored 300 - 600 GHz range. Such frequency window matches new BiCMOS technology capabilities and thus opens up opportunity near-field using these devices. To assess efficacy this band, data from 16 freshly excised samples were collected analyzed directly...
A broadband three-stage pseudo-differential SiGe-interconnection bipolar transistor (HBT) power amplifier (PA) for high-speed communication at around 300 GHz is presented. The fabricated in an experimental 130-nm SiGe BiCMOS technology with <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$f_{t}/f_{\max }$ </tex-math></inline-formula> of 470/650 GHz. use asymmetric coupled line transformers proposed to...
This article presents a terahertz (THz) source system-on-a-chip (SoC) specifically designed for computational imaging with single-pixel camera (SPC). The SoC consists of an 8 × array independent, frequency-unlocked THz sources that together radiate maximum 10.3-dBm power at 0.42 THz. Each pixel is composed fundamental Colpitts oscillator, followed by common-collector doubler and on-chip circular slot antenna. radiated from the can be modulated in space turning pixels on or off individually...
This paper presents a 430 GHz source implemented in 0.13-μm SiGe BiCMOS technology with f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</sub> /f xmlns:xlink="http://www.w3.org/1999/xlink">max</sub> of 300 GHz/450 GHz. The comprises fundamental differential Colpitts cascode oscillator at 215 driving balanced common-collector doubler that utilizes inductive 2 <sup xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> -harmonic feedback the...
This paper presents a fully integrated system-on-achip for real-time terahertz super-resolution near-field imaging. The chip consists of 128 sensing pixels with individual crossbridged double 3-D split-ring resonators arranged in 3.2 mm long 2 × 64 1-D array. It is implemented 0.13-μm SiGe bipolar complementary metal-oxide-semiconductor technology and operated at around 550 GHz. All the functions, including sensor illumination, sensing, detection, are co-integrated readout circuit image...
Abstract This paper reports investigations led on the combination of refractive index and morphological dilation to enhance performances towards breast tumour margin delineation during conserving surgeries. The map invasive ductal lobular carcinomas were constructed from an inverse electromagnetic problem. Morphological combined with thresholding was conducted classify tissue regions as malignant or benign. A histology routine evaluate various geometries associated different thresholds. It...
Terahertz waves cover photon energies that are orders of magnitude smaller (0.4-40 meV) than the visual spectrum. Therefore, they provide additional information on intrinsic condensed-matter properties, making them attractive for imaging applications in life sciences [1], [2]. Furthermore, do not have an ionizing effect and considered biologically innocuous. The ever-present water organic matter strongly absorbs terahertz waves, subtle changes concentration can be indicative disease [3]....
Computational THz Imaging (CTI) is the process of indirectly forming images using algorithms that rely on a significant amount computing. Unlike focal-plane arrays (FPAs), single-pixel camera (SPC) uses spatially patterned illumination in conjunction with CTI to measure entire image only one receiver [1]. can overcome existing SNR limitations imaging systems as it relaxes implementation issues high-power sources and low-noise FPAs (Fig. 29.1.1). However, measurements must be taken series...
Light-field (LF) refers to the spatio-directional light flow in space. In LF imaging, rays are recorded along different positions and directions, a 3-D scene is reconstructed with back-propagation [1]. Modern visible-light cameras assemble lens array atop megapixel (Mpx) count focal-plane (FPA), such that each (macro-pixel) provides spatial sampling while FPA pixels within (sub-pixels) provide angular [2]. Likewise, THz can allow real-time 3D see-through imaging for inspection screening...
There is a need to reduce the cost and size of functional terahertz devices, in order expedite this notoriously underutilized frequency band toward practical applications. Electronic integrated circuits (ICs) are extremely useful end, as they provide means achieve miniaturization mass production, leveraging foundries techniques that have made digital electronics ubiquitous. Although integration systems expected diminish performance functionality, increased number availability devices likely...
This paper presents a high power 0.49 THz source manufactured in an advanced SiGe BiCMOS technology. The comprises broadband lens-integrated circular slot on-chip antenna coupled to single-ended triple-push Colpitts oscillator. Broadband harmonic power-shorting at the collector terminals is used maximize third voltage swing. provides up 38 μW (-14.2 dBm) radiated and occupies die area of 0.294 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
This paper presents a 300 GHz x9 multiplier chain in an advanced 0.13-μm SiGe HBT technology. It consists of 2 over-driven differential class-A cascode triplers (27-35 and 81-105 GHz), buffer amplifier, bandpass mode-selective filters, 3-stage power amplifier (PA). The filters were designed to allow broadband operation with high harmonic rejection. Band-selective matching transformers common mode (CM) suppression are implemented. has peak 9.6 dBm output at 270 GHz, fractional 3-dB bandwidth...
Today, electronics are implemented on rigid substrates. However, many objects in daily-life not — they bendable, stretchable and even foldable. Examples paper, tapes, our body, skin textiles. Until today there is a big gap between bendable items. Concerning this matter, the DFG Priority Program FFlexCom aims at paving way for novel research area: Wireless communication systems fully integrated an ultra-thin, flexible piece of plastic or paper. The encompasses 13 projects led by 25...
This paper presents a low-cost silicon-based terahertz computed tomography system for industrial volumetric imaging. The THz-CT scanner comprises single radiator and detector at 490 GHz PTFE-lens based optical train that is fixed inside portable cage system. It features 2.5 mm resolution limited by the effective lens aperture offers up to 62 dB SNR in chopped 38 continuous-wave acquisition mode. To authors best knowledge this work first demonstration of entirely on silicon components.
Real-time terahertz video cameras are regarded as key enabler systems for numerous applications. Unfortunately, their spatial resolution is fundamentally restricted by the diffraction limit. Near-field-scanning optical microscopy (NSOM) used in THz domain to break through this limit [1]. Recently reported near-field sensors based on silicon technology promise significant improvements compared NSOM with respect sensor sensitivity, system cost, and scanning time [2,3]. However, only...
A broadband 3-stage pseudo-differential SiGe power amplifier, fabricated in an experimental 130 nm BiC-MOS technology with f <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</inf> / xmlns:xlink="http://www.w3.org/1999/xlink">max</inf> of 470/650 GHz, is presented this paper. Coupled-line matching networks optimized impedance ratios are used to maximize bandwidth and output while maintaing flat gain group delay for wireless communications...
Terahertz (THz) imaging and tomography are modern techniques allowing 2D 3D inspection of objects over a broadband frequency range. However, the transfer this technique to medical applications is limited surface or subsurface due large concentration water molecules which an intrinsic characteristic biological tissues. Then, we report results investigations led on freshly excised breast cancer tissues through reflection geometry. We focus dielectric response abnormal normal respectively in...
We employ a lens-coupled CMOS terahertz camera to measure the dispersion of an inexpensive reflective diffraction grating. Thus, although was originally intended for imaging applications, we show that it can be re-purposed perform spectral analysis. Two different experiments determine content source under test are performed. These target separate frequency bands, and hence they must make use sources gratings. As such, demonstrate modular low-cost technique analysis in range.
This paper presents a 275 GHz amplifier in an advanced 0.13 μm SiGe technology, which has been developed during the European funding project DOTSEVEN, featuring f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T/</sub> xmlns:xlink="http://www.w3.org/1999/xlink">max</sub> of 350/550 GHz. Thus operates at 1 . Utilizing pseudo-differential common-base topology, it employs inductive series-series feedback element single stage level to increase...
Abstract Breast Cancer is one of the most frequently diagnosed cancer diseases worldwide, and common invasive tumour for women. As with all cancers, early detection plays a major role in reducing mortality morbidity rate. Currently, breast cancers are detected due to clinical symptoms, or by screening mammography. The limitations these techniques have resulted research alternative methods imaging detecting cancer. Apart from this, it essential define precise margins during breast-conserving...
We demonstrate a 0.55 THz near-field sensor implemented in 0.13 μm SiGe HBT technology from IHP Microelectronics. The utilizes differential split-ring resonator for evanescent field sensing and on-chip illumination detection circuitry to enable future large scale array implementations. It provides dielectric permitivity dependent image contrast lateral resolution of 8 (λ/71). presented work indicates that super-resolution imaging based on sensors are fully integrated silicon may represent an...
A set of balun-integrated 100/300 GHz differential on-chip pads for broadband characterization (small/large-signal) active circuits fabricated in SiGe HBT technology is presented. general theory asymmetric coupled-lines inhomogeneous medium was applied to design a Marchand-like balun consisting multiple sub-λ/4 long nonuniformly-sized line sections with close-proximity ground-plane compensate the frequency-dependent pad impedance.
Breast conservative surgeries are performed to remove the cancer and surrounding tissue while preserving breast itself. The precise definition of tumor margins is essential reduce re-excision rate. In that context, potential morphological dilations applied terahertz refractive index maps tissues was investigated. Several dilation geometries were studied. method has shown a sensitivity around 80% 82% for best case. These results indicate combination fundamental optical properties tissues,...