Searched for: subject:"Detectors"
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Li, X. (author)
The development of solid state lighting (SSL) has been involving with improving the luminaire efficiency and integrating non-luminous functions, also known as More than Illumination. The objective of this thesis is to investigate different solutions for the concept of More than Illumination for SSL applications, to combine general lighting with...
doctoral thesis 2020
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Wang, B. (author)
Breast cancer, being the most common cancer among females, is nowadays routinely diagnosed using X-ray mammography. Though this technique has proven its effectiveness in many cases, X-ray mammography has some disadvantages like reduced diagnostic sensitivity for dense breasts, need for strong breast compression and inability to assess tissues at...
doctoral thesis 2020
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Wang, B. (author), Kreuger, R. (author), Huizenga, J. (author), Beekman, F.J. (author), Goorden, M.C. (author)
Photomultiplier tube (PMT)-based scintillation cameras are predominant in molecular imaging but have the drawback that position estimation is severely degraded near the edges (dead edge effect). This leads to sensitivity losses and can cause severe problems in applications like molecular breast imaging and in certain SPECT devices. Using smaller...
journal article 2020
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Esmaeil Zadeh, I. (author), Chang, J. (author), Van Staaden, Yuri J. (author), Swens, Jeroen P.E. (author), Dobrovolskiy, S. (author), Schaart, D.R. (author), Pereira, S.F. (author), Zwiller, Val (author), Dorenbos, S.N. (author)
A broad range of scientific and industrial disciplines require precise optical measurements at very low light levels. Single-photon detectors combining high efficiency and high time resolution are pivotal in such experiments. By using relatively thick films of NbTiN (8-11 nm) and improving the pattern fidelity of the nanostructure of the...
journal article 2020
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van der Reep, T.H.A. (author), Looman, B.A. (author), Chan, H.W. (author), Hagen, C.W. (author), van der Graaf, H. (author)
We measure the transmission secondary electron yield of nanometer-thick Al2O3/TiN/Al2O3 films using a prototype version of a Timed Photon Counter (TiPC). We discuss the method to measure the yield extensively. The yield is then measured as a function of landing energy between 1.2 and 1.8 keV and found to be in the range of 0.1 (1.2 keV) to 0.9 ...
journal article 2020
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Elsinger, Lukas (author), Gourgues, R.B.M. (author), Esmaeil Zadeh, I. (author), Maes, Jorick (author), Guardiani, A. (author), Bulgarini, G. (author), Pereira, S.F. (author), Dorenbos, S.N. (author), Zwiller, Val (author)
Future quantum optical networks will require an integrated solution to multiplex suitable sources and detectors on a low-loss platform. Here we combined superconducting single-photon detectors with colloidal PbS/CdS quantum dots (QDs) and low-loss silicon nitride passive photonic components to show their combined operation at cryogenic...
conference paper 2020
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Davis, Kristina K. (author), Yates, Stephen J.C. (author), Jellema, Willem (author), Groppi, Christopher E. (author), Baselmans, J.J.A. (author), Kohno, Kotaro (author), Baryshev, Andrey M. (author)
Complex field mapping is a powerful tool to characterize the optical performance of astronomical instruments, and has become the standard for characterizing heterodyne array cameras. Recently, an adaptation of the heterodyne beam mapping technique was demonstrated on a single pixel of a direct detector instrument. We present a novel...
journal article 2019
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Sharma, Salil (author), Snelder, M. (author), van Lint, J.W.C. (author)
On important truck-dominated motorways, a large share of traffic consists of trucks. Our hypothesis is that these trucks do not always make optimal routing decisions which cause inefficiencies in the traffic system. Therefore, route choice of truck drivers is of interest to both transport planners and traffic management authorities. The...
conference paper 2019
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Elsinger, Lukas (author), Gourgues, R.B.M. (author), Esmaeil Zadeh, I. (author), Maes, Jorick (author), Guardiani, A. (author), Bulgarini, G. (author), Pereira, S.F. (author), Dorenbos, S.N. (author), Zwiller, V.G. (author)
Single-photon sources and detectors are indispensable building blocks for integrated quantum photonics, a research field that is seeing ever increasing interest for numerous applications. In this work, we implemented essential components for a quantum key distribution transceiver on a single photonic chip. Plasmonic antennas on top of silicon...
journal article 2019
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Endo, A. (author), Karatsu, K. (author), Pascual Laguna, A. (author), Mirzaei, B. (author), Thoen, David (author), van Marrewijk, N.T. (author), Bosma, S. (author), Yurduseven, O. (author), Llombart, Nuria (author), Klapwijk, T.M. (author), Baselmans, J.J.A. (author)
Terahertz spectrometers with a wide instantaneous frequency coverage for passive remote sensing are enormously attractive for many terahertz applications, such as astronomy, atmospheric science, and security. Here we demonstrate a wide-band terahertz spectrometer based on a single superconducting chip. The chip consists of an antenna coupled...
journal article 2019
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Lens, E. (author), Tolboom, Ellen (author), Schaart, D.R. (author)
Various methods for in vivo range estimation during proton therapy based on the measurement of prompt gamma (PG) photons have been proposed. However, optimizing the method of detection by trial-and-error is a tedious endeavor. Here, we investigate the feasibility of using the Cramér-Rao lower bound (CRLB) to more quickly arrive at an optimum...
journal article 2019
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Llombart Juan, N. (author), Dabironezare, S.O. (author), Carluccio, G. (author), Freni, A. (author), Neto, A. (author)
Passive imaging cameras at millimeter and submillimeter wavelengths are currently entering a new era with the development of large format arrays of direct detectors. Several of these arrays are being developed with bare absorbing meshes without any antenna coupling (lens or horn) structures. The design of such arrays is typically done...
journal article 2018
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Schouhamer Immink, Kees A. (author), Cai, Kui (author), Weber, J.H. (author)
We consider the transmission and storage of encoded strings of symbols over a noisy channel, where dynamic threshold detection is proposed for achieving resilience against unknown scaling and offset of the received signal. We derive simple rules for dynamically estimating the unknown scale (gain) and offset. The estimates of the actual gain...
journal article 2018
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Kouwenberg, J. J.M. (author), Wolterbeek, H.T. (author), Denkova, A.G. (author), Bos, A. J.J. (author)
Background: While alpha microdosimetry dates back a couple of decades, the effects of localized energy deposition of alpha particles are often still unclear since few comparative studies have been performed. Most modern alpha microdosimetry studies rely for large parts on simulations, which negatively impacts both the simplicity of the...
journal article 2018
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Ji, Yangbeibei (author), Xu, Mingwei (author), Li, Jie (author), van Zuylen, H.J. (author)
The macroscopic fundamental diagram (MFD) is a graphical method used to characterize the traffic state in a road network and to monitor and evaluate the effect of traffic management. For the determination of an MFD, both traffic volumes and traffic densities are needed. This study introduces a methodology to determine an MFD using combined...
journal article 2018
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Ferrari, Lorenza (author), Yurduseven, O. (author), Llombart, Nuria (author), Yates, Stephen J.C. (author), Bueno, Juan (author), Murugesan, Vignesh (author), Thoen, David (author), Endo, A. (author), Baryshev, AM (author), Baselmans, J.J.A. (author)
Next generation sub-mm imaging instruments require kilo-pixel focal plane arrays filled with background limited detectors. Microwave kinetic inductance detectors (MKIDs) are a state-of-the-art detector for future instruments due to their inherent multiplexing capabilities. An MKID consists of a superconducting resonator coupled to a feed-line...
journal article 2018
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Dabironezare, S.O. (author), Hassel, J. (author), Gandini, E. (author), Grönberg, L. (author), Sipola, H. (author), Vesterinen, V. (author), Llombart, Nuria (author)
In this contribution, a focal plane array (FPA) at submillimeter wavelengths is presented for security applications. The detectors are based on kinetic inductance bolometers. Two frequency selective absorber (FSA) sets were designed to implement a security imager. The effective pattern of the imager coupled to a black body point source over a...
conference paper 2018
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Wang, B. (author), Kreuger, R. (author), Beekman, F.J. (author), Goorden, M.C. (author)
Anger cameras based on monolithic NaI scintillators read out by an array of PMTs are predominant in planar gamma imaging and SPECT. However, position estimation of gamma interactions is usually severely degraded near the edges of the scintillator which can be extremely undesirable for applications like breast imaging. Here we propose a...
journal article 2018
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Borghi, G. (author), Tabacchini, V. (author), Bakker, P.J. (author), Schaart, D.R. (author)
Recently, a monolithic scintillator detector for time-of-flight (TOF)/depth-of-interaction (DOI) positron emission tomography (PET) was developed. It has a detector spatial resolution of ∼1.7 mm full-width-at-half-maximum (FWHM), a coincidence resolving time (CRT) of ∼215 ps FWHM, and ∼4.7 mm FWHM DOI resolution. Here, we demonstrate, for the...
journal article 2018
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Nagasaki, T. (author), Choi, J. (author), Génova-Santos, R. T. (author), Karatsu, K. (author), Lee, K. (author), Naruse, M. (author), Suzuki, J. (author), Taino, T. (author), Tomita, N. (author)
Cosmic microwave background (CMB) radiation is an afterglow from the Big Bang. CMB contains rich information about the early stage of the universe. In particular, odd-parity patterns (B-mode) in the CMB polarization on a large angular scale would provide an evidence of the cosmic inflation. The aim of the GroundBIRD experiment is to observe...
journal article 2018
Searched for: subject:"Detectors"
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