Optical Möbius strips that surround points of circular polarization, C points, in a generic three-dimensional optical field are cloaked by lines of twisted ribbons attached to the C points. When cloaking occurs, the observable signed twist index that counts the number of half-twists (one or three), and also measures the handedness (right or left), of a generic Möbius strip is determined by the twisted ribbon cloaks. Although some cloaks can be detached, they can never all be removed.
© 2014 Optical Society of America
Original Manuscript: September 30, 2013
Revised Manuscript: November 21, 2013
Manuscript Accepted: November 27, 2013
Published: February 3, 2014
Isaac Freund, "Optical Möbius strips and twisted ribbon cloaks," Opt. Lett. 39, 727-730 (2014)