Enantioselective optical forces and size-dependent sorting of single chiral particles using vortex beams

Author(s)

Ali, R. ; Pinheiro, F. A. ; Dutra, R. S. ; Alegre, T. P. Mayer ; Wiederhecker, G. S.

• Document type: Journal article
• Source: PHYSICAL REVIEW B; v. 110, n. 11, p. 9-pg., 2024-09-06.

Abstract

We put forward an approach to manipulate and enantioselect chiral microspheres using vortex beams that encode topological charges. Vortex beams with different topological charges transfer angular momentum to chiral particles with opposite handedness in a different way. This process also depends on the incident polarization, in a rich interplay that ultimately leads to enantioselective optical forces acting on single chiral particles with selected, arbitrary sizes. Besides this scheme also depends on the order of the topological charge, which can also be controlled experimentally. The resulting enantioselective optical forces are up to two orders of magnitude larger than the existing chiral resolution methods based on optical forces, further demonstrating the unique functionalities and applicability of the method. (AU)

• FAPESP's process: 18/15580-6 - Optomechanical cavities towards single photon strong coupling
• Grantee: Thiago Pedro Mayer Alegre
• Support Opportunities: Research Grants - Young Investigators Grants - Phase 2
• FAPESP's process: 18/25339-4 - Integrated photonics devices
• Grantee: Newton Cesario Frateschi
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 20/03131-2 - Sound-light interaction in optical microcavities
• Grantee: Rfaqat Ali
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/15577-5 - Nonlinear nanophotonics circuits: building blocks for optical frequency synthesis, filtering and signal processing
• Grantee: Gustavo Silva Wiederhecker
• Support Opportunities: Research Grants - Young Investigators Grants - Phase 2