title: Chiral resolution of spin angular momentum in linearly polarized and unpolarized light.
abstract: Linearly polarized (LP) and unpolarized (UP) light are racemic entities since they can be described as superposition of opposite circularly polarized (CP) components of equal amplitude. As a consequence they do not carry spin angular momentum. Chiral resolution of a racemate, i.e. separation of their chiral components, is usually performed via asymmetric interaction with a chiral entity. In this paper we provide an experimental evidence of the chiral resolution of linearly polarized and unpolarized Gaussian beams through the transfer of spin angular momentum to chiral microparticles. Due to the interplay between linear and angular momentum exchange, basic manipulation tasks, as trapping, spinning or orbiting of micro-objects, can be performed by light with zero helicity. The results might broaden the perspectives for development of miniaturized and cost-effective devices.
authors.affiliation: CNR-Nanotec, LiCryL lab., Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
authors.forename: R J
authors.initials: RJ
authors.lastname: Hernández
authors.affiliation: CNR-Nanotec, LiCryL lab., Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
authors.forename: A
authors.initials: A
authors.lastname: Mazzulla
authors.affiliation: Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
authors.forename: C
authors.initials: C
authors.lastname: Provenzano
authors.affiliation: Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.|CNR-Nanotec, LiCryL lab., Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
authors.forename: P
authors.initials: P
authors.lastname: Pagliusi
authors.affiliation: Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.|CNR-Nanotec, LiCryL lab., Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
authors.forename: G
authors.initials: G
authors.lastname: Cipparrone