Subwavelength displacement of the far-field image of a radiating dipole

The field lines of the Poynting vector for light emitted by a dipole with a rotating dipole moment show a vortex pattern near the location of the dipole. In the far field, each field line approaches a straight line, but this line does not appear to come exactly from the location of the dipole. As a result, the image of the dipole in its plane of rotation seems displaced. Secondly, the image in the far field is displaced as compared with the image of a source for which the field lines run radially outward. It turns out that both image displacements are the same. The displacements are of subwavelength scale, and they depend on the angles of observation. The maximum displacement occurs for observation in the plane of rotation and equals lambda/pi, where lambda is the wavelength of the light.

Medienart:

Artikel

Erscheinungsjahr:

2008

Erschienen:

2008

Enthalten in:

Zur Gesamtaufnahme - volume:33

Enthalten in:

Optics letters - 33(2008), 13 vom: 01. Juli, Seite 1446-8

Sprache:

Englisch

Beteiligte Personen:

Arnoldus, Henk F [VerfasserIn]
Li, Xin [VerfasserIn]
Shu, Jie [VerfasserIn]

Themen:

Journal Article

Anmerkungen:

Date Completed 16.09.2008

Date Revised 03.07.2019

published: Print

Citation Status PubMed-not-MEDLINE

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM18059849X