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Topological Insulator-based devices can transport electrons/photons at the surfaces of materials without any back reflections, even in the presence of obstacles. Topological properties have recently been studied using non-reciprocal…

Optics · Physics 2016-11-03 Babak Bahari , Ricardo Tellez-Limon , Boubacar Kanté

This paper presents the evaluation of the Radar Cross Section (RCS) of a metallic object by measurements accomplished within the diffuse-field environment produced by a Reverberation Chamber (RC). The method is based on the extraction of…

Signal Processing · Electrical Eng. & Systems 2020-04-16 Ariston Reis , Francois Sarrazin , Philippe Pouliguen , Jérôme Sol , Philippe Besnier , Elodie Richalot

The production of X-ray radiation with a high degree of circular polarization constitutes an important goal at XFEL facilities. A simple scheme to obtain circular polarization control with crossed undulators has been proposed so far. In its…

Accelerator Physics · Physics 2011-01-24 Gianluca Geloni , Vitali Kocharyan , Evgeni Saldin

The X-ray Timing and Polarization (XTP) is a mission concept for a future space borne X-ray observatory and is currently selected for early phase study. We present a new design of X-ray polarimeter based on the time projection gas chamber.…

Instrumentation and Methods for Astrophysics · Physics 2015-09-16 Hong Li , Hua Feng , Jianfeng Ji , Zhi Deng , Li He , Ming Zeng , Tenglin Li , Yinong Liu , Peiyin Heng , Qiong Wu , Dong Han , Yongwei Dong , Fangjun Lu , Shuangnan Zhang

The temperature coefficient of resistance (TCR) is one of the most fundamental properties of a material. Semiconductor materials exhibiting high TCR are promising candidates for applications in high-resolution thermal imaging for autonomous…

In this article, two wide band high-efficiency metasurface structures as a linear-cross polarizer in transmission mode based on asymmetric split-ring resonators (ASRR) are proposed and tested to indicate that this is not a purely…

We analyse the performance of a gas time projection chamber (TPC) as a high-performance gamma-ray telescope and polarimeter in the e$^+$e$^-$ pair creation regime. We use data collected at a gamma-ray beam of known polarisation. The TPC…

The POLAR detector is a space based Gamma Ray Burst (GRB) polarimeter with a wide field of view, which covers almost half the sky. The instrument uses Compton scattering of gamma rays on a plastic scintillator hodoscope to measure the…

We report the design and construction of a novel soft x-ray diffractometer installed at Diamond Light Source. The beamline endstation RASOR is constructed for general users and designed primarily for the study of single crystal diffraction…

Strongly Correlated Electrons · Physics 2014-11-21 T. A. W. Beale , T. P. A. Hase , T. Iida , K. Endo , P. Steadman , A. R. Marshall , S. S. Dhesi , G. van der Laan , P. D. Hatton

We study top quark pair productions at a polarized photon collider from an e(+)e(-) linear collider (LC) in various improved technicolor model, namely, the one-family walking technicolor model, the top-color-assisted technicolor model, and…

High Energy Physics - Phenomenology · Physics 2008-11-26 Bin Zhang , Yuanning Gao , Yu-Ping Kuang

We report on a traceable calibration system for a 3500mm-long console that carries a measurement system for inspecting the diameter of a circular reactor chassis. The system uses two single-pass laser interferometers with homodyne fringe…

Instrumentation and Detectors · Physics 2019-05-03 Simon Rerucha , Bretislav Mikel , Zdenek Matej , Ondrej Herman , Miroslava Hola , Michal Jelinek , Petr Jedlicka , Ondrej Cip , Josef Lazar

We propose a new type of a chiral metamaterial based on an ensemble of artificial molecules formed by three identical quantum-dots in a triangular arrangement. A static magnetic field oriented perpendicular to the plane breaks mirror…

Mesoscale and Nanoscale Physics · Physics 2014-12-04 Panagiotis Kotetes , Pei-Qing Jin , Michael Marthaler , Gerd Schön

Development of methods to control the directional and spectral characteristics of thermal radiation from metallic surfaces is a critical factor enabling many important thermal management applications. In this paper, we study the thermal…

We present an approach for the study and design of reflectors with rotational or translational symmetry that redirect light from a point source into any desired radiant intensity distribution. This method is based on a simple conformal map…

Optics · Physics 2019-09-04 Luis A. Aleman Castaneda , Miguel A. Alonso

The screen is a key part of stereoscopic display systems using polarization to separate the different channels for each eye. The system crosstalk, characterizing the imperfection of the screen in terms of preserving the polarization of the…

In this article we discuss the design and implementation of a novel microstrip resonator which allows for the absolute control of the microwaves polarization degree for frequencies up to 30 GHz. The sensor is composed of two half-wavelength…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 J. J. Henderson , C. M. Ramsey , H. M. Quddusi , E. del Barco

For highly divergent emission of broad-area vertical-cavity surface-emitting lasers (VCSELs) a rotation of the polarization direction by up to 90 degrees occurs when the pump rate approaches the lasing threshold. Well below threshold the…

Pattern Formation and Solitons · Physics 2013-05-29 M. Schulz-Ruhtenberg , I. V. Babushkin , N. A. Loiko , K. F. Huang , T. Ackemann

Multiple lidars are prevalently used on mobile vehicles for rendering a broad view to enhance the performance of localization and perception systems. However, precise calibration of multiple lidars is challenging since the feature…

Computer Vision and Pattern Recognition · Computer Science 2019-04-30 Jianhao Jiao , Qinghai Liao , Yilong Zhu , Tianyu Liu , Yang Yu , Rui Fan , Lujia Wang , Ming Liu

The chromosphere is a highly complex and dynamic layer of the Sun, that serves as a conduit for mass and energy supply between two, very distinct regions of the solar atmosphere, namely, the photosphere and corona. Inferring magnetic fields…

Solar and Stellar Astrophysics · Physics 2017-09-06 Rohan E. Louis , A. Raja Bayanna , Hector Socas Navarro

Polarization measurements of the gamma-ray component of transient sources are of great scientific interest, they are however, also highly challenging. This is due to the typical low signal to noise and the potential for significant…

Instrumentation and Methods for Astrophysics · Physics 2023-04-05 Merlin Kole , Jianchao Sun