Photonics Research, Volume. 10, Issue 4, 877(2022)
Exploitation of geometric and propagation phases for spin-dependent rational-multiple complete phase modulation using dielectric metasurfaces
Fig. 1. Schematic illustration of a unit cell for rational-multiple phase modulation through merged propagation and geometric phases. For RCP (
Fig. 2. Amplitude and phase distribution of the fundamental unit cell for the linearly orthogonal input polarizations. From electric fields
Fig. 3. Design and operating principle of spin-selective beam deflector and splitter. For RCP
Fig. 4. Numerically computed results for beam deflection and splitting. (a) Under the incidence of RCP and LCP light on the meta design, the transmitted electric fields
Fig. 5. Schematic of the working principle of the rational-multiple spin-switchable SOC. For RCP incoming light, the LCP light emerging from the back side of the design can carry OAM with any arbitrary value of topological charge value
Fig. 6. Numerical simulation results for polarization-switchable rational-multiple SOC designs. Five different designs with different structural parameters for OAM mode with topological charge value
Fig. 7. Phase modulations when the meta-atom is rotated at
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Ata Ur Rahman Khalid, Fu Feng, Naeem Ullah, Xiaocong Yuan, Michael Geoffrey Somekh. Exploitation of geometric and propagation phases for spin-dependent rational-multiple complete phase modulation using dielectric metasurfaces[J]. Photonics Research, 2022, 10(4): 877
Category: Silicon Photonics
Received: Aug. 2, 2021
Accepted: Feb. 1, 2022
Published Online: Mar. 11, 2022
The Author Email: Xiaocong Yuan (xcyuan@szu.edu.cn), Michael Geoffrey Somekh (mike.somekh@szu.edu.cn)