Lensfree on-chip imaging using nanostructured surfaces.
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.
Khademhosseinieh
Bahar
B
Sencan
Ikbal
I
Biener
Gabriel
G
Su
Ting-Wei
TW
Coskun
Ahmet F
AF
Tseng
Derek
D
Ozcan
Aydogan
A