Bidirectional Raman soliton-like combs with unidirectional pump in a spherical microresonator
We experimentally demonstrate bidirectional Raman soliton-like combs in a whispering gallery mode microresonator with a unidirectional pump ... (Source: Optics Letters)
Source: Optics Letters - April 19, 2024 Category: Physics Authors: Alexey V. Andrianov Elena A. Anashkina Source Type: research
Optical MTF and aberration predictions with the Helmholtz-Lagrange invariant
The paper presents a method for a rough estimation of the aberrations and of the MTF of an optical system by means of the ... (Source: Applied Optics)
Source: Applied Optics - April 19, 2024 Category: Physics Authors: P. Sandri Source Type: research
Dual-band and spectrally selective infrared absorbers based on hybrid gold-graphene metasurfaces
In this paper, we propose a dual-band and spectrally selective infrared (IR) absorber based on a hybrid structure comprising a patterned ... (Source: Optics Express)
Source: Optics Express - April 19, 2024 Category: Physics Authors: Mahsa Alijabbari Rouhollah Karimzadeh Samaneh Pakniyat J. Sebastian Gomez-Diaz Source Type: research
Optical spatial differentiation enabled layer sensing of two-dimensional atomic crystals
Zero-thickness model and slab model are two important models in the description of optical behaviors in two-dimensional atomic crystals. ... (Source: Optics Express)
Source: Optics Express - April 19, 2024 Category: Physics Authors: Jin Zhang Hanqing Wu Mian Huang Xin Dai Tao Zhang Yingdan Li Xiaoyan Yu Source Type: research
Nonvolatile multilevel adjustable optical switch based on plasmonic slot waveguide and GST segmented structure
Optical computing has gradually demonstrated its efficiency in handling increasingly complex computational demands, attracting widespread ... (Source: Optics Express)
Source: Optics Express - April 19, 2024 Category: Physics Authors: Yiqun Zhang Qiong Duan Xu Yan Qi Zhang Yegang Lu Source Type: research
Coherent Nyquist optical pulse transmission at nearly 1-Tb/s/ λ over 1,600 km with a capacity of 21.5 Tb/s using PS-32 QAM signals
We demonstrate the 1,600-km transmission at nearly 1-Tb/s/ λ signals with a capacity of 21.5 Tb/s. Probabilistic shaping was newly ... (Source: Optics Express)
Source: Optics Express - April 19, 2024 Category: Physics Authors: Shohei Beppu Aoto Ishikawa Takeki Serikawa Masato Yoshida Toshihiko Hirooka Masataka Nakazawa Source Type: research
Quantum-informed plasmonics for strong coupling: the role of electron spill-out
The effect of nonlocality on the optical response of metals lies at the forefront of research in nanoscale physics and, in particular, ... (Source: Journal of the Optical Society of America B)
Source: Journal of the Optical Society of America B - April 19, 2024 Category: Physics Authors: Ida Juliane Bundgaard Christian Nicolaisen Hansen P. Elli Stamatopoulou Christos Tserkezis Source Type: research
An investigation of internal scatter during computed tomography using an anthropomorphic phantom
ConclusionsA non-statistical significance for Computed Tomography examinations with and without Lead Shielding in confirmation with the AAPM positional statement. (Source: Health and Technology)
Source: Health and Technology - April 19, 2024 Category: Information Technology Source Type: research
Development of novel low-cost readout electronics for large field-of-view gamma camera detectors
Given the extensive use of gamma cameras as a medical diagnostic instrument for characterizing the biodistribution of gamma-emitting radiopharmaceuticals administered to patients [1 –3], significant research was carried out to improve the performance of gamma cameras [4]. In a gamma camera, first the gamma rays emitted from the patient’s body are collimated using a collimator, subsequently interacting with a monolithic scintillation crystal (commonly used NaI(Tl)). The prod uced light is converted to a signal by an array of large area photomultiplier tubes (PMTs) located on the opposite side of the crystal. (Source: Ph...
Source: Physica Medica: European Journal of Medical Physics - April 19, 2024 Category: General Medicine Authors: Aram Radnia, Amirhossein Alikhani, Behnoosh Teimourian, Mahyar Yousef Nejad, Mohammad Hossein Farahani, Fakhereh Pashaei, Arman Rahmim, Habib Zaidi, Mohammad Reza Ay Source Type: research
An investigation of internal scatter during computed tomography using an anthropomorphic phantom
ConclusionsA non-statistical significance for Computed Tomography examinations with and without Lead Shielding in confirmation with the AAPM positional statement. (Source: Health and Technology)
Source: Health and Technology - April 19, 2024 Category: Information Technology Source Type: research
Daring ‘James Bond’ mission to drill Antarctic ices cores could reveal future of sea level rise
The helicopter hovered overhead, whipping up snow. Shielding his face, Peter Neff grabbed the dangling cargo load and guided it to the Antarctic ice. The helicopter sped back to the South Korean icebreaker
RV Araon
, 20 kilometers away, to fetch more gear. One trip down, 17 more to go,
thought Neff, a polar glaciologist
at the University of Minnesota (UM) Twin Cities. Time was ticking away on this day in January. In the best-case scenario, Neff and his team would have just 10 days to drill ice cores on Canisteo, a peninsula on the west coast of Antarctica—and a blizzard was already looming.
Ever...
Source: Science of Aging Knowledge Environment - April 18, 2024 Category: Geriatrics Source Type: research
It's OK to move! Effect of a brief video on community confidence in activity despite back pain: A randomised trial
CONCLUSION: Participants who viewed a brief video intervention reported a very small difference in confidence to become active despite low back pain, compared with no intervention. The difference may lack clinical relevance.PMID:38635937 | DOI:10.2519/jospt.2024.12412 (Source: Health Physics)
Source: Health Physics - April 18, 2024 Category: Physics Authors: Edel T O'Hagan Adrian C Traeger Siobhan M Schabrun Sean O'Neill Benedict M Wand Aidan G Cashin Christopher M Williams Ian A Harris James H McAuley Source Type: research
Raman Characterization of Plastics: A DFT Study of Polystyrene
This study addresses this gap by using theoretical calculations to generate ab initio spectra for polystyrene, a reference material. The aim is to explain the origins of the spectral peaks and their consistency across various compositions and structures using linear ordered polymeric and finite amorphous models. The CRYSTAL package is employed to obtain full Raman spectra based on a careful benchmark of computational settings. While some peaks are present across all spectra and can serve for calibration, others exhibit structure-dependent behavior, enabling polymer identification. We conclude that Raman spectroscopy is a w...
Source: Health Physics - April 18, 2024 Category: Physics Authors: Beata Taudul Frederik Tielens Monica Calatayud Source Type: research
Deep learning-based optimization of field geometry for total marrow irradiation delivered with volumetric modulated arc therapy
CONCLUSIONS: The generated field geometries were clinically acceptable and adequate, even for an MP with high level of expertise in TMI/TMLI. Incorporating the knowledge of the MPs into the development cycle was crucial for optimizing the models, especially in this scenario with limited data.PMID:38634859 | DOI:10.1002/mp.17089 (Source: Health Physics)
Source: Health Physics - April 18, 2024 Category: Physics Authors: Nicola Lambri Giorgio Longari Daniele Loiacono Ricardo Coimbra Brioso Leonardo Crespi Carmela Galdieri Francesca Lobefalo Giacomo Reggiori Roberto Rusconi Stefano Tomatis Luisa Bellu Stefania Bramanti Elena Clerici Chiara De Philippis Damiano Dei Pierina Source Type: research
Study of PRESAGE ® dosimeter for end-to-end 3D radiotherapy verification using an anthropomorphic phantom with bespoke dosimeter insert
This study proves the capability of PRESAGE® and bespoke MAX-HD phantom in conjunction with the 3DmicroHD-OCT system to measure 3D dose distribution for end-to-end dosimetry verification.PMID:38634981 | DOI:10.1007/s13246-024-01418-9 (Source: Health Physics)
Source: Health Physics - April 18, 2024 Category: Physics Authors: Muhammad Zamir Mohyedin Hafiz Mohd Zin Auwal Abubakar Ahmad Taufek Abdul Rahman Source Type: research
