title: Invisibility Cloak Printed on a Photonic Chip.
abstract: Invisibility cloak capable of hiding an object can be achieved by properly manipulating electromagnetic field. Such a remarkable ability has been shown in transformation and ray optics. Alternatively, it may be realistic to create a spatial cloak by means of confining electromagnetic field in three-dimensional arrayed waveguides and introducing appropriate collective curvature surrounding an object. We realize the artificial structure in borosilicate by femtosecond laser direct writing, where we prototype up to 5,000 waveguides to conceal millimeter-scale volume. We characterize the performance of the cloak by normalized cross correlation, tomography analysis and continuous three-dimensional viewing angle scan. Our results show invisibility cloak can be achieved in waveguide optics. Furthermore, directly printed invisibility cloak on a photonic chip may enable controllable study and novel applications in classical and quantum integrated photonics, such as invisualising a coupling or swapping operation with on-chip circuits of their own.
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Feng
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Bing-Hong
authors.initials: BH
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Yu-Xi
authors.initials: YX
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Lu-Feng
authors.initials: LF
authors.lastname: Qiao
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Ai-Lin
authors.initials: AL
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute of Natural Sciences &Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Xian-Min
authors.initials: XM
authors.lastname: Jin