title: Design and fabrication of a diffractive phase element for wavelength demultiplexing and spatial focusing simultaneously.
abstract: The design of a diffractive phase element (DPE) that simultaneously implements wavelength demultiplexing and focusing is carried out on the basis of the general theory of amplitude-phase retrieval. The designed DPE is fabricated with optical contact lithography. Three masks are needed to produce the surface-relief structure of the DPE with eight quantized levels in depths. Experiments demonstrate that the designed DPE can successfully implement both the functions of demultiplexing three different-wavelength beams and focusing each component at a predesignated position simultaneously. Experimental measurements are in good agreement with the results of numerical simulations.
authors.forename: B Z
authors.initials: BZ
authors.lastname: Dong
authors.forename: G Q
authors.initials: GQ
authors.lastname: Zhang
authors.forename: G Z
authors.initials: GZ
authors.lastname: Yang
authors.forename: B Y
authors.initials: BY
authors.lastname: Gu
authors.forename: S H
authors.initials: SH
authors.lastname: Zheng
authors.forename: D H
authors.initials: DH
authors.lastname: Li
authors.forename: Y S
authors.initials: YS
authors.lastname: Chen
authors.forename: X M
authors.initials: XM
authors.lastname: Cui
authors.forename: M L
authors.initials: ML
authors.lastname: Chen
authors.forename: H D
authors.initials: HD
authors.lastname: Liu