title: High-visibility, high-order lensless ghost imaging with thermal light.
abstract: High-visibility Nth-order ghost imaging with thermal light has been realized by recording only the intensities in two optical paths in a lensless setup. It is shown that the visibility is dramatically enhanced as the order N increases, but longer integration times are required owing to the increased fluctuations of higher-order intensity correlation functions. It is also demonstrated that the required integration time for a good image depends on the partition ratio of the intensities on the two detectors and the complexity of the object.
authors.affiliation: Laboratory of Optical Physics, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Xi-Hao
authors.initials: XH
authors.lastname: Chen
authors.forename: Ivan N
authors.initials: IN
authors.lastname: Agafonov
authors.forename: Kai-Hong
authors.initials: KH
authors.lastname: Luo
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.forename: Rui
authors.initials: R
authors.lastname: Xian
authors.forename: Maria V
authors.initials: MV
authors.lastname: Chekhova
authors.forename: Ling-An
authors.initials: LA
authors.lastname: Wu