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Layers with gradient refractive-index profile are an attractive alternative to conventional homogeneous stack coatings. However, the optical characterization and monitoring of the graded refractive-index profile is a complex issue, which…

光学 · 物理学 2021-11-03 Vít Kanclíř , Jan Václavík , Karel Žídek

This paper introduces a practical and accurate calibration method for camera spectral sensitivity using a diffraction grating. Accurate calibration of camera spectral sensitivity is crucial for various computer vision tasks, including color…

计算机视觉与模式识别 · 计算机科学 2025-08-04 Lilika Makabe , Hiroaki Santo , Fumio Okura , Michael S. Brown , Yasuyuki Matsushita

This work focuses on the characterization of various bulk silicon (Si) samples using Fourier Transform InfraRed (FTIR) and grating spectrometers in order to get them suitable for applications in astronomy. Different samples at different…

材料科学 · 物理学 2018-08-21 B. Uzakbaiuly , D. B. Tanner , J. Ge , J. Degallaix , A. S. Markosyan

Hyperspectral object tracking using snapshot mosaic cameras is emerging as it provides enhanced spectral information alongside spatial data, contributing to a more comprehensive understanding of material properties. Using transformers,…

计算机视觉与模式识别 · 计算机科学 2025-02-27 Shaheer Mohamed , Tharindu Fernando , Sridha Sridharan , Peyman Moghadam , Clinton Fookes

Trapped-ion quantum computing requires precise optical control for individual qubit manipulation. However, conventional free-space optics face challenges in alignment stability and scalability as the number of qubits increases. Integrated…

Beamforming has proven to be valuable in enabling full-duplex massive MIMO base stations, but doing so effectively often requires knowledge of the self-interference channel matrix H. Estimating this high-dimensional channel is costly in…

信号处理 · 电气工程与系统科学 2026-05-22 Samuel H. Li , Ian P. Roberts

Silicon Photomultipliers with cell-pitch ranging from 12 $\mu$m to 20 $\mu$m were tested against neutron irradiation at moderate fluences to study their performance for calorimetric applications. The photosensors were developed by FBK…

The extremely low dark current of silicon carbide (SiC) detectors, even after high-fluence irradiation, was utilized to develop a beam monitoring system for a wide range of particle rates, i.e., from the kHz to the GHz regime. The system is…

仪器与探测器 · 物理学 2024-03-20 Simon Waid , Andreas Gsponer , Jürgen Maier , Philipp Gaggl , Richard Thalmeier , Thomas Bergauer

We present the characterization of a photon-number-resolving detection chain based on Silicon photomultipliers (SiPM) coupled to a 14 bit, 1 Gs\s digital acquisition system embedding an FPGA-based signal processing pipeline that performs…

量子物理 · 物理学 2026-05-20 Alex Pozzoli , Stefano Carsi , Andrea Abba , Alessia Allevi

In the field of computer vision, visible light images often exhibit low contrast in low-light conditions, presenting a significant challenge. While infrared imagery provides a potential solution, its utilization entails high costs and…

计算机视觉与模式识别 · 计算机科学 2024-04-30 Yijia Chen , Pinghua Chen , Xiangxin Zhou , Yingtie Lei , Ziyang Zhou , Mingxian Li

We develop a single-layer waveguide surface grating structure to vertically couple near infrared (NIR) light at ~1.55 um wavelength from a large area (~100 um length scale) Si waveguide on a Silicon-On-Insulator (SOI) substrates to…

The measured experimental results of optical diffraction of 10, 5 and 3.4 micrometer period plasmonic surface relief grating are presented for the application of band-pass filter in visible spectral range. Conventional scanning electron…

应用物理 · 物理学 2017-08-24 Sudheer , S. Porwal , S. Bhartiya , C. Mukherjee , P. Tiwari , T. K. Sharma , V. N. Rai , A. K. Srivastava

Position-aided beam selection methods have been shown to be an effective approach to achieve high beamforming gain while limiting the overhead and latency of initial access in millimeter wave (mmWave) communications. Most research in the…

信号处理 · 电气工程与系统科学 2021-10-14 Sajad Rezaie , Elisabeth de Carvalho , Carles Navarro Manchón

The ionization profile monitors (IPMs) are used to measure the beam size in synchrotrons. Both the Fermilab Recycler and Main Injector (MI) machines have IPMs. However, they were not well understood enough to provide confidence in their…

加速器物理 · 物理学 2023-07-17 B. Babacan , R. Ainsworth , K. J. Hazelwood , D. K Morris , P. Snopok

In ion cancer therapy, high-intensity ion beams are used to treat tumors by taking advantage of the Bragg-Peak. Typical ion therapy centers use particle rates up to $10^{10}$ ions/second for treatment. On the other hand, such intensities…

仪器与探测器 · 物理学 2022-02-02 Manuel Christanell , Maximilian Tomaschek , Thomas Bergauer

A collaboration between Fermilab and the Institute for High Energy Physics (IHEP), Beijing, has developed a beam position monitor for the IHEP test beam facility. This telescope is based on 5 stations of silicon strip detectors having a…

仪器与探测器 · 物理学 2011-01-27 R. Angstadt , W. Cooper , M. Demarteau , J. Green , S. Jakubowski , A. Prosser , R. Rivera , M. Turqueti , M. Utes , Xiao Cai

The application of silicon photomultiplier (SiPM) technology for weak-light detection at a single photon level has expanded thanks to its better photon detection efficiency in comparison to a conventional photomultiplier tube (PMT). SiPMs…

Image identification is one of the most challenging tasks in different areas of computer vision. Scale-invariant feature transform is an algorithm to detect and describe local features in images to further use them as an image matching…

计算机视觉与模式识别 · 计算机科学 2018-03-15 Ebrahim Karami , Mohamed Shehata , Andrew Smith

The integration of photonic components into surface ion traps provides a scalable approach for trapped-ion quantum computing, sensing, and metrology, enabling compact systems with enhanced stability and precision. However, the introduction…

量子物理 · 物理学 2025-04-01 Guochun Du , Elena Jordan , Tanja E. Mehlstäubler

Expanding far beyond traditional applications in optical interconnects at telecommunications wavelengths, the silicon nanophotonic integrated circuit platform has recently proven its merits for working with mid-infrared (mid-IR) optical…