In:
Laser & Photonics Reviews, Wiley, Vol. 16, No. 1 ( 2022-01)
Abstract:
It is commonly believed that optical activity (OA) is manifested mainly in chiral media, but rare in non‐chiral structures. Here, an analog of OA in free space is experimentally demonstrated by using a single liquid‐crystal Pancharatnam–Berry phase element (PBPE), for which the mechanism is highly consistent with that of the traditional OA. The specifically designed PBPE supports the direction‐dependent polarization rotation of a Bessel beam with controllable “rotatory power.” Such a polarization rotation can be revoked by another PBPE with the same structure. Unlike in a chiral medium, this scheme shows simultaneous realization of equivalent leverotation and dextorotation merely by switching the optical element orientation, promising for applications non‐magnetic optical devices such as optical isolators.
Type of Medium:
Online Resource
ISSN:
1863-8880
,
1863-8899
DOI:
10.1002/lpor.202100291
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
2266512-2