Download or read book Designing and Implementing a Readout Strategy for Superconducting Single Photon Detectors written by Charles Henry Herder (III.) and published by . This book was released on 2010 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: Photon detection is an integral part of experimental physics, high-speed communication, as well as many other high-tech disciplines. In the realm of communication, unmanned spacecraft are travelling extreme distances, and ground stations need more and more sensitive and selective detectors to maintain a reasonable data rate.[10] In the realm of computing, some of the most promising new forms of quantum computing require consistent and efficient optical detection of single entangled photons.[27] Due to projects like these, demands are increasing for ever more efficient detectors with higher count rates. The Superconducting Nanowire Single-Photon Detector (SNSPD) is one of the most promising new technologies in this field, being capable of counting photons as faster than 100MHz and with efficiencies around 50%. Currently, the leading competition is from the geiger-mode avalanche photodiode, which is capable of ~20- 70% efficiency at a ~5MHz count rate depending on photon energy. In spite of these advantages, the SNSPD is still a brand-new technology and as a result they do not have the same support hardware support as other detectors. As such, SNSPD's are much more difficult to integrate into an existing an experiment. Because of this difficulty, SNSPD's have not been deployed extensively for research or industrial applications. The signal analysis chain that is connected to this detector is one of the key choke points. Each detector count produces a 0.1 mV, 10 nS wide pulse with a maximum count frequency on the order of 100MHz. Currently, this signal is processed outside of the cryostat with a series of RF amplifiers and a high-speed counter. This design works for detector prototyping, but poses a series of problems with actual design implementation. Most importantly, it prevents our design from being scalable. Even though we can fabricate thousands of detectors on a single wafer, it would be extremely difficult to place that many RF lines without crosstalk or other interference. The purpose of this thesis is to build a more robust and scalable readout technology for SNSPDs. First, we will develop intermediate technologies that improve upon current readout technology and will be necessary to develop the final goal. Ultimately, we plan to build circuitry on-chip that will first convert each detector's analog signal to a digital signal and then condense the data from each detector into an externally clocked, single-bit output indicating the presence or absence of a photon at any detector. This will allow simultaneous readout of a large number of detectors on a single wafer. Additionally, our cryogenic will decrease the noise observed by the detector, as the amplifier is no longer operating at room temperature. Finally, our readout will provide a simple hardware API to be interfaced to a computer or embedded processing unit. The catch to this development process is that the entire system must operate at 4.2K or below. As such, one must either use HEMT CMOS or Rapid Single-Flux- Quantum (RSFQ) logic. HEMT CMOS is better suited to analog amplification of the output signal, while RSFQ circuitry is better suited to the construction of the SNSPD interface and digital logic. RSFQ circuitry is better suited as an input stage because input amplification with CMOS is difficult, as one must operate in the linear regime of a HEMT. This requires on the order of 1 mA at 1.8 V minimum, which results in approximately 2 mW per stage. This is to be compared against RSFQ comparators which utilize approximately 0.5 mA at almost no voltage, resulting in muW of dissipation per stage. Given that we are hoping to produce a large number of SNSPD input stages, RSFQ is clearly a better choice. However, we only have a small number of output signals from the cryostat, so it is much more reasonable to use CMOS, as we can attain larger signal amplitudes.

Download or read book Technology and readout for scaling up superconducting nanowire single photon detectors written by Knehr, Emanuel Marius and published by KIT Scientific Publishing. This book was released on 2023-03-02 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents three advances to scale SNSPDs from few-pixel devices to large detector arrays: atomic layer deposition for the fabrication of uniform superconducting niobium nitride films of few-nanometer thickness, a frequency-multiplexing scheme to operate multiple detectors with a reduced number of lines, and the integration of SNSPDs with free-form polymer structures to achieve efficient optical coupling onto the active area of the detectors.

Download or read book Real time imaging systems for superconducting nanowire single photon detector arrays written by Hofherr, Matthias and published by KIT Scientific Publishing. This book was released on 2014-09-26 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconducting nanowire singe-photon detectors (SNSPD) are promising detectors in the field of applications, where single-photon resolution is required like in quantum optics, spectroscopy or astronomy. These cryogenic detectors gain from a broad spectrum in the optical and infrared range and deliver low dark count rates and low jitter times. This thesis improves the understanding of the detection mechanism of SNSPDs and intodruces new and promising multi-pixel readout concepts.

Download or read book Design of Broadband High efficiency Superconducting nanowire Single Photon Detectors written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single Photon Generation and Detection written by Karl K. Berggren and published by Elsevier Inc. Chapters. This book was released on 2013-11-29 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconducting materials provide a unique opportunity for single-photon detectors. The combination of the strong non-linearity present in the superconducting-metal transition and in Josephson junctions; the unique electrical property of zero resistance; the fast relaxation processes present in many superconducting materials; and the easily engineered optical absorptance of metals results in a system that can be adapted to many photo-detection requirements. As a result of these material features, a variety of detector families have emerged in recent years based on superconducting nanowires, tunnel junctions, weak thermal links, and kinetic-inductive resonators. The detectors variously provide high speed single-photon detection; high-sensitivity in the infrared, optical, UV, or even x-ray wavelengths; and high efficiency. The resulting applications include quantum and classical high-data-rate communication, biological imaging, LIDAR, and VLSI circuit evaluation among others.

Download or read book Superconducting Nanowire Single photon Detectors written by Faraz Najafi and published by . This book was released on 2015 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconducting nanowire single-photon detectors (SNSPDs) are a promising technology for long-distance optical communication and quantum information processing. Recent advances in single-photon generation, storage and detection technologies have spurred interest in integration of these components onto a single microchip, which would act as a low-power non-classical optical processor. In this thesis, I will present a method for the scalable integration of SNSPDs with photonic chips. I will show that, using a micron-scale flip-chip process, waveguide-coupled SNSPDs can be integrated onto a variety of material systems with high yield. This technology enabled the assembly of the first photonic chip with multiple adjacent SNSPDs with average system detection efficiencies beyond 10%. Using this prototype, we will show the first on-chip detection of non-classical light. I will further demonstrate optimizations to the detector design and fabrication processes. These optimizations increased the direct fabrication yield and improved the timing jitter to 24 ps for detectors with high internal efficiency. Furthermore, I will show a novel single-photon detector design that may have the potential to reach photodetection dead times below 1ns.

Download or read book Improving the Spectral Bandwidth of Superconducting Nanowire Single Photon Detectors SNSPDs written by Charaev, Ilya and published by KIT Scientific Publishing. This book was released on 2018-07-31 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Superconducting Devices in Quantum Optics written by Robert Hadfield and published by Springer. This book was released on 2016-02-29 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the basics and applications of superconducting devices in quantum optics. Over the past decade, superconducting devices have risen to prominence in the arena of quantum optics and quantum information processing. Superconducting detectors provide unparalleled performance for the detection of infrared photons in quantum cryptography, enable fundamental advances in quantum optics, and provide a direct route to on-chip optical quantum information processing. Superconducting circuits based on Josephson junctions provide a blueprint for scalable quantum information processing as well as opening up a new regime for quantum optics at microwave wavelengths. The new field of quantum acoustics allows the state of a superconducting qubit to be transmitted as a phonon excitation. This volume, edited by two leading researchers, provides a timely compilation of contributions from top groups worldwide across this dynamic field, anticipating future advances in this domain.

Download or read book Real time Imaging Systems for Superconducting Nanowire Single photon Detector Arrays written by Matthias Hofherr and published by . This book was released on 2020-10-09 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconducting nanowire singe-photon detectors (SNSPD) are promising detectors in the field of applications, where single-photon resolution is required like in quantum optics, spectroscopy or astronomy. These cryogenic detectors gain from a broad spectrum in the optical and infrared range and deliver low dark count rates and low jitter times. This thesis improves the understanding of the detection mechanism of SNSPDs and intodruces new and promising multi-pixel readout concepts. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.

Download or read book Particle Detectors written by Hermann Kolanoski and published by Oxford University Press. This book was released on 2020-06-30 with total page 949 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fundamentals of particle detectors as well as their applications. Detector development is an important part of nuclear, particle and astroparticle physics, and through its applications in radiation imaging, it paves the way for advancements in the biomedical and materials sciences. Knowledge in detector physics is one of the required skills of an experimental physicist in these fields. The breadth of knowledge required for detector development comprises many areas of physics and technology, starting from interactions of particles with matter, gas- and solid-state physics, over charge transport and signal development, to elements of microelectronics. The book's aim is to describe the fundamentals of detectors and their different variants and implementations as clearly as possible and as deeply as needed for a thorough understanding. While this comprehensive opus contains all the materials taught in experimental particle physics lectures or modules addressing detector physics at the Master's level, it also goes well beyond these basic requirements. This is an essential text for students who want to deepen their knowledge in this field. It is also a highly useful guide for lecturers and scientists looking for a starting point for detector development work.

Download or read book Superconducting Nanowire Single photon Detectors for Quantum Information Science written by Kathryn L. Nicolich and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum information science is rapidly advancing and it is likely that society will experience a major shift in the way we handle information in the coming years. As critical advancements such as quantum computation and quantum cryptography progress, the full manifestation of a second quantum revolution is on the horizon. Photons will be an integral part of quantum information science, especially for communication purposes, so we will need to develop excellent single-photon detector technologies. In this thesis, I describe a promising single-photon detector candidate, superconducting nanowire single-photon detectors, and provide a new theoretical basis for understanding these detectors. Specifically, I explore the relationship between various detector parameters and the readout signal and show that its rising edge can be described using a characteristic time that is proportional to the square root of the length of the detector and is inversely proportional to the square root of the absorbed photon number n and bias current. Therefore, this work provides a theoretical basis for photon-number resolution in a conventional single-pixel superconducting nanowire single-photon detector. Based on these predictions, I describe a demonstration of photon-number resolution in superconducting nanowire single-photon detectors that correctly identifies more than 99.7% of n=1 events and more than 98% of n>1 events when distinguishing between n=1 versus n>1, as well as explore the effects of other parameters via experiment and by drawing from the literature. While seeking to understand the quality of the demonstrated photon-number resolution, I find that there is likely some spatial variation in the intrinsic detector parameters. I predict that this may result in some below critical temperature resistance in these detectors and verify this experimentally. The resistance ranges from around 50 Ohms at 0.9 K to multiple kOhms closer to the critical temperature. This is small enough to allow the detectors to function at low temperatures; however, its presence is expected to deteriorate detector performance at higher temperatures via induced latching. This work constitutes an important addition to the understanding of superconducting nanowire single-photon detectors. The theoretically predicted and experimentally verified photon-number resolution will increase their versatility and greatly simplify or make possible many quantum information science applications, including linear-optics quantum computing and boson sampling. The measured below critical temperature resistance is unexpected and undesirable since it can negatively affect detector performance. This is an area that warrants further exploration.

Download or read book Single Photon Generation and Detection written by Alain Aspect and published by Elsevier Inc. Chapters. This book was released on 2013-11-29 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single Photon Imaging written by Peter Seitz and published by Springer Science & Business Media. This book was released on 2011-08-03 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: The acquisition and interpretation of images is a central capability in almost all scientific and technological domains. In particular, the acquisition of electromagnetic radiation, in the form of visible light, UV, infrared, X-ray, etc. is of enormous practical importance. The ultimate sensitivity in electronic imaging is the detection of individual photons. With this book, the first comprehensive review of all aspects of single-photon electronic imaging has been created. Topics include theoretical basics, semiconductor fabrication, single-photon detection principles, imager design and applications of different spectral domains. Today, the solid-state fabrication capabilities for several types of image sensors has advanced to a point, where uncoooled single-photon electronic imaging will soon become a consumer product. This book is giving a specialist ́s view from different domains to the forthcoming “single-photon imaging” revolution. The various aspects of single-photon imaging are treated by internationally renowned, leading scientists and technologists who have all pioneered their respective fields.

Download or read book Superconducting Single Photon Detectors written by Sander Nugraha Dorenbos and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design of High Speed and High Efficiency Single Photon Detectors Using Silicon Avalanche Photodiodes written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pixel Detectors written by Leonardo Rossi and published by Springer Science & Business Media. This book was released on 2006-01-18 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pixel detectors are a particularly important class of particle and radiation detection devices. They have an extremely broad spectrum of applications, ranging from high-energy physics to the photo cameras of everyday life. This book is a general purpose introduction into the fundamental principles of pixel detector technology and semiconductor-based hybrid pixel devices. Although these devices were developed for high-energy ionizing particles and radiation beyond visible light, they are finding new applications in many other areas. This book will therefore benefit all scientists and engineers working in any laboratory involved in developing or using particle detection.

Download or read book Modeling Josephson Junctions in LTSPice for Use in Superconducting Single Photon Detector Readout Systems written by Adam Stenson and published by . This book was released on 2019 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: