title: Lensfree on-chip imaging using nanostructured surfaces.
abstract: We introduce the use of nanostructured surfaces for lensfree on-chip microscopy. In this incoherent on-chip imaging modality, the object of interest is directly positioned onto a nanostructured thin metallic film, where the emitted light from the object plane, after being modulated by the nanostructures, diffracts over a short distance to be sampled by a detector-array without the use of any lenses. The detected far-field diffraction pattern then permits rapid reconstruction of the object distribution on the chip at the subpixel level using a compressive sampling algorithm. This imaging modality based on nanostructured substrates could especially be useful to create lensfree fluorescent microscopes on a compact chip.
authors.forename: Bahar
authors.initials: B
authors.lastname: Khademhosseinieh
authors.forename: Ikbal
authors.initials: I
authors.lastname: Sencan
authors.forename: Gabriel
authors.initials: G
authors.lastname: Biener
authors.forename: Ting-Wei
authors.initials: TW
authors.lastname: Su
authors.forename: Ahmet F
authors.initials: AF
authors.lastname: Coskun
authors.forename: Derek
authors.initials: D
authors.lastname: Tseng
authors.forename: Aydogan
authors.initials: A
authors.lastname: Ozcan