A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_session0d1lortd026d64e234gh75qg8r0e7l0l): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@remsenmedia.com&api_key=81853a771c3a3a2c6b2553a65bc33b056f08&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests

Filename: helpers/my_audit_helper.php

Line Number: 197

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 197
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 271
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3145
Function: getPubMedXML

File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

Electromagnetic scattering laws in Weyl systems. | LitMetric

Electromagnetic scattering laws in Weyl systems.

Nat Commun

Department of Electrical and Computer Engineering, University of Wisconsin, Madison, Madison, 53705, USA.

Published: November 2017

AI Article Synopsis

  • * This scattering behavior explains natural phenomena like the blue color of the sky and the varying strength of mobile phone signals.
  • * New materials called Weyl systems can manipulate these scattering laws, allowing for customized wave interactions at any wavelength, enhancing applications in radiofrequency and optics.

Article Abstract

Wavelength determines the length scale of the cross section when electromagnetic waves are scattered by an electrically small object. The cross section diverges for resonant scattering, and diminishes for non-resonant scattering, when wavelength approaches infinity. This scattering law explains the colour of the sky as well as the strength of a mobile phone signal. We show that such wavelength scaling comes from the conical dispersion of free space at zero frequency. Emerging Weyl systems, offering similar dispersion at non-zero frequencies, lead to new laws of electromagnetic scattering that allow cross sections to be decoupled from the wavelength limit. Diverging and diminishing cross sections can be realized at any target wavelength in a Weyl system, providing the ability to tailor the strength of wave-matter interactions for radiofrequency and optical applications.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5680227PMC
http://dx.doi.org/10.1038/s41467-017-01533-0DOI Listing

Publication Analysis

Top Keywords

electromagnetic scattering
8
weyl systems
8
cross sections
8
wavelength
5
scattering laws
4
laws weyl
4
systems wavelength
4
wavelength determines
4
determines length
4
length scale
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!