Abstract
We study the transmission and the reflection of light beams carrying orbital angular momentum through a dielectric multilayer structure containing phase-conjugating interfaces. We show analytically and demonstrate numerically that the phase conjugation at the interfaces results in a characteristic angular and radial pattern of the reflected beam, a fact that can be exploited for the detection and the characterization of phase conjugation in composite optical materials.
Highlights
In recent years light beams carrying orbital angular momentum (OAM) [1,2,3,4,5,6,7] have received an increased attention, in the field of the optical manipulation and characterization of materials
We study the transmission and the reflection of light beams carrying orbital angular momentum through a dielectric multilayer structure containing phase-conjugating interfaces
We show analytically and demonstrate numerically that the phase conjugation at the interfaces results in a characteristic angular and radial pattern of the reflected beam, a fact that can be exploited for the detection and the characterization of phase conjugation in composite optical materials
Summary
In recent years light beams carrying orbital angular momentum (OAM) [1,2,3,4,5,6,7] have received an increased attention, in the field of the optical manipulation and characterization of materials. Beams with OAM were realized as Laguerre Gaussian (LG) laser modes These modes appear as annular rings with a zero on-axis intensity and are specified by the mode indices which are related to the angular degree of freedom around the propagation direction, and p that describes the number of nodes of the beam radial profile. In the case of normal incidence, the azimuthal index of the reflected or the transmitted LG beam is increased and decreased by the cross-polarization coupling in the beam component of the incident beam [11,12,13] In this contribution, we have study the propagation of twisted light in a multi layer dielectric medium containing interfaces that act as phase-conjugating mirrors (PCM) [14,15,16,17]. These unique features of phase conjugating mirrors are confirmed by previous experimental studies [24,25]
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