Lensfree on-chip imaging using nanostructured surfaces

Khademhosseinieh, Bahar; Sencan, Ikbal; Biener, Gabriel; Su, Ting-Wei; Coskun, Ahmet F.; Tseng, Derek; Ozcan, Aydogan
April 2010
Applied Physics Letters;4/26/2010, Vol. 96 Issue 17, p171106
Academic Journal
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.


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