Super-Enhancement Focusing of Teflon Spheres

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

Fersiynau electronig

Dogfennau

Dangosydd eitem ddigidol (DOI)

A Teflon (Polytetrafluoroethylene, PTFE) sphere can be used as a focusing lens in the applications of imaging and sensing due to its low-loss property in the terahertz (THz) band. In this paper, we analytically calculated field intensities and focusing parameters for Teflon spheres at different low-loss levels and then discovered a super-enhancement focusing effect in the spheres with particular size parameters, which can stimulate about 4000 times stronger field intensity than that for incident radiation as well as the great potential of overcoming diffraction limit despite high sensitivity to the magnitude of Teflon loss. A subsequent analysis of scattering amplitudes proved that the strong scattering of a single order mode in the internal electric or magnetic field is the main factor causing this phenomenon.

Allweddeiriau

Iaith wreiddiolSaesneg
Rhif yr erthygl2000373
CyfnodolynAnnalen der Physik
Cyfrol532
Rhif y cyfnodolyn10
Dyddiad ar-lein cynnar8 Medi 2020
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 9 Hyd 2020

Cyfanswm lawlrlwytho

Nid oes data ar gael
Gweld graff cysylltiadau