@article {580736,
	title = {Arbitrary spin-to-orbital angular momentum conversion of light},
	journal = {Science},
	volume = {358},
	year = {2017},
	pages = {896-901},
	abstract = {
	
		
			
				
					
						
							
								
									Optical elements that convert the spin angular momentum (SAM) of light into vortex beams have found applications in classical and quantum optics. These elements{\textemdash}SAM-to{\textendash} orbital angular momentum (OAM) converters{\textemdash}are based on the geometric phase and only permit the conversion of left- and right-circular polarizations (spin states) into states with opposite OAM. We present a method for converting arbitrary SAM states into total angular momentum states characterized by a superposition of independent OAM. We designed a metasurface that converts left- and right-circular polarizations into states with independent values of OAM and designed another device that performs this operationfor elliptically polarized states. These results illustrate a general material-mediated connection between SAM and OAM of light and may find applications in producing complex structured light and in optical communication.
								
							
						
					
				
			
		
	

},
	url = {http://science.sciencemag.org/content/358/6365/896},
	author = {Robert C. Devlin and Ambrosio, Antonio and Noah A. Rubin and J. P. Balthasar Mueller and Capasso, Federico}
}
