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Improved theory for the polarization-dependent transverse shift of a paraxial light beam in free space
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Bekshaev A. 

Spatial distribution of longitudinal field component of circularly polarised optical beam depends on the polarization handedness, which causes a lateral shift of “centre of gravity” of the beam when its polarization toggles. We present generalised theory of this effect, which demonstrates relation of the latter with angular irradiance moments of the beam. The theory is applicable to arbitrary paraxial beams and shows that the lateral shift is the same for the all cross sections of the beam.

Keywords: paraxial beam, circular polarization, transverse shift

PACS: 42.25.–p, 42.25.Ja, 42.90.+m
UDC: 535.131, 535.47, 535.51
Ukr. J. Phys. Opt. 12  10-18
doi: 10.3116/16091833/12/1/10/2011
Received: 10.11.2010

Анотація. Просторовий розподіл поздовжньої компоненти поля циркулярно поляризованого оптичного променя залежить від знаку циркулярної поляризації, що спричинює бокове зміщення „гравітаційного центру” при перемиканні поляризації. Запропонована узагальнена теорія цього ефекту, яка демонструє зв’язок вищезгаданого з кутовим моментом променя. Теорія може бути застосована до будь-якого параксіального променя та вказує на те, що бокове зміщення є однаковим для всього поперечного перетину променя.
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