Results 51 to 60 of about 17,725 (236)

Fundamental limitations of the polarization purity of x rays

APL Photonics, 2018
For a few years, x-ray polarimeters have been discussed and even used as a key method for the investigation of fundamental physical questions, from quantum electrodynamics to solid state physics. However, the sensitivity of optical instruments is limited.
K. S. Schulze
doaj   +1 more source

Pitfalls of statistics-limited X-ray polarization analysis

, 2018
One of the difficulties with performing polarization analysis is that the mean polarization fraction of sub-divided data sets is larger than the polarization fraction for the integrated measurement.
Mikhalev, Victor
core   +1 more source

PCA-based denoising method for division of focal plane polarimeters.

Optics Express, 2017
Division of focal plane (DoFP) polarimeters are composed of interlaced linear polarizers overlaid upon a focal plane array sensor. The interpolation is essential to reconstruct polarization information. However, current interpolation methods are based on
Junchao Zhang, Haibo Luo, Rongguang Liang, Wei Zhou, Bin Hui, Zheng Chang   +5 more
semanticscholar   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Training a Dataset Simulated Using RGB Images for an End-to-End Event-Based DoLP Recovery Network

Photonics
Event cameras are bio-inspired neuromorphic sensors that have emerged in recent years, with advantages such as high temporal resolutions, high dynamic ranges, low latency, and low power consumption.
Changda Yan, Xia Wang, Xin Zhang, Conghe Wang, Qiyang Sun, Yifan Zuo   +5 more
doaj   +1 more source

GASP-Galway astronomical Stokes polarimeter

EPJ Web of Conferences, 2010
The Galway Astronomical Stokes Polarimeter (GASP) is an ultra-high-speed, full Stokes, astronomical imaging polarimeter based upon a Division of Amplitude Polarimeter.
Shearer A., Redfern M., Collins P., Sheehan B., Kyne G.   +4 more
doaj   +1 more source

Machine Learning-Based Estimation of PM_2.5 Concentration Using Ground Surface DoFP Polarimeters

IEEE Access, 2022
In this paper, we propose a machine learning system for the estimation of atmospheric particulate matter (PM) concentration, specifically, particles with a maximum diameter of $2.5{\mu }\text{m}$ .
Maen Takruri, Abubakar Abubakar, Abdul-Halim Jallad, Basel Altawil, Prashanth R. Marpu, Amine Bermak   +5 more
doaj   +1 more source

A high-efficiency spin-resolved phototemission spectrometer combining time-of-flight spectroscopy with exchange-scattering polarimetry

, 2010
We describe a spin-resolved electron spectrometer capable of uniquely efficient and high energy resolution measurements. Spin analysis is obtained through polarimetry based on low-energy exchange scattering from a ferromagnetic thin-film target.
A. K. Schmid, A. Lanzara, A. V. Fedorov, C. Jozwiak, F. El Gabaly, Feder R., G. Lebedev, J. Graf, N. Andresen, W. Wan, Z. Hussain   +10 more
core   +1 more source

Indirect Band Edge and Chain‐Locked Linear Dichroism in the Quasi‐1D Van der Waals Antiferromagnet AgCrP2S6

Advanced Functional Materials, EarlyView.
AgCrP2S6 reveals a momentum‐indirect band edge (≈1.35 eV) and chain‐locked linear dichroism: the first direct transitions emerge at 1.6–1.8 eV for E||a. Resonant Raman and photoemission corroborate this assignment. In ACPS/graphene heterostructures, photocurrent turns on above ≈1.5 eV and follows the same polarization selection rules (anisotropy ≈0.53),
Oleksandr Volochanskyi, Sabrina Juergensen, Václav Valeš, Kumari Surbhi, Martin Mergl, Kseniia Mosina, Zdeněk Sofer, Jan Honolka, Patryk Kusch, Martin Kalbáč   +9 more
wiley   +1 more source

The HARPS polarimeter

, 2010
To be published in ASP Conf Series, Solar Polarization Workshop ...
Snik, F., Kochukhov, O., Piskunov, N., Rodenhuis, M., Jeffers, S.V., Keller, C.U., Dolgopolov, A., Stempels, H. C., Makaganiuk, V., Valenti, J., Johns-Krull, C.   +10 more
openaire   +4 more sources