Singularity, representing a structurally stable topological defect (TD), plays a pivotal role in various physical systems. Here we theoretically present the fingerprints of TDs and uncover the resulting exotic optical properties in a tailored metasurface system. The presence of the TDs results in coherent perfect absorption, and dramatic optical property transition from slow to superluminal light behavior when the parameters cross the TD. Our investigation provides a new route to explore many phenomena of the TDs, extends the capabilities of metasurface, and offers benefits to develop potential nanophotonic applications based on the design of the metasurface.
© 2014 Optical Society of America
Original Manuscript: May 19, 2014
Revised Manuscript: June 23, 2014
Manuscript Accepted: July 1, 2014
Published: August 13, 2014
Ming Kang, Yongnan Li, and Hui-Tian Wang, "Fingerprints of topological defects in a metasurface," Opt. Lett. 39, 4879-4882 (2014)