Open AccessReal-time contrast-enhanced holographic imaging using phase coherent photorefractive quantum wells
Author(s) -
Amit Dongol,
Jonathan Thompson,
Heidrun Schmitzer,
D. Tierney,
Hans Wägner
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.012795
Subject(s) - optics , holography , photorefractive effect , materials science , holographic display , cuvette , fresnel diffraction , quantum well , phase (matter) , diffraction , optoelectronics , reference beam , laser , physics , quantum mechanics
We demonstrate wide-field real-time and depth-resolved contrast enhanced holographic imaging (CEHI) using the all-optical phase coherent photorefractive effect in ZnSe quantum wells. Moving objects are imaged at large depth-of-field by the local enhancement of a static reference hologram. The high refresh rate of the holographic films enables direct-to-video monitoring of floating glass beads and of living Paramecium and Euglena cells moving in water. Depth resolution is achieved by tilting the incident laser beam with respect to the normal of the cuvette. This creates double images of the objects, which are analyzed geometrically and with Fresnel diffraction theory. A two-color CEHI set-up further enables the visualization of a concealed 95 µm thick wire behind a thin layer of chicken skin.