title: Sub-100nm resolution PSIM by utilizing modified optical vortices with fractional topological charges for precise phase shifting.
abstract: We demonstrate an all-optical plasmonic structured illumination microscopy (PSIM) technique. A set of plasmonic standing-wave patterns is excited by amplitude-modified optical vortices (OVs), which have fractional topological charges for precise phase shift of {-2π/3, 0, 2π/3}. A specially designed optical aperture is introduced to modify the OVs in order to improve the uniformity of interference patterns. The imaging results of fluorescent beads reveal a sub-100nm resolving capability in aqueous environment. This PSIM technique as a structure-free, wide-field and super-resolved imaging technique is of great potential for low-cost biological dynamic imaging applications.
authors.forename: Shibiao
authors.initials: S
authors.lastname: Wei
authors.forename: Ting
authors.initials: T
authors.lastname: Lei
authors.forename: Luping
authors.initials: L
authors.lastname: Du
authors.forename: Chonglei
authors.initials: C
authors.lastname: Zhang
authors.forename: Houkai
authors.initials: H
authors.lastname: Chen
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: S W
authors.initials: SW
authors.lastname: Zhu
authors.forename: X-C
authors.initials: XC
authors.lastname: Yuan