
Proceedings Paper
Polarization gratings allow for real-time and artifact-free circular dichroism measurementsFormat | Member Price | Non-Member Price |
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Paper Abstract
We propose a simple and innovative diffractive method for circular dichroism (CD) spectroscopy. It enables real-time
measurements and suppress the artifacts introduced by anisotropic specimens and nonideal optical elements in
conventional CD spectrometers. The method is based on a single cycloidal optical axis grating and takes advantage of its
peculiar optical diffraction behavior. We prove that the true CD spectrum of a general anisotropic medium could be
measured in the spectral range of interest, exploiting unpolarized white light and the intrinsic spectral selectivity of the
grating. Two experimental approaches have been pursued to create the cycloidal optical axis grating, both based on
polarization holography and liquid crystal photoaligning technology. The gratings are replicas of the polarization
holograms in thin-films of azodyes, either in low molar mass liquid crystal cells or in reactive mesogen layers.
Paper Details
Date Published: 31 May 2011
PDF: 14 pages
Proc. SPIE 8069, Integrated Photonics: Materials, Devices, and Applications, 806910 (31 May 2011); doi: 10.1117/12.886969
Published in SPIE Proceedings Vol. 8069:
Integrated Photonics: Materials, Devices, and Applications
Ali Serpengüzel; Giancarlo Cesare Righini; Alfred Leipertz, Editor(s)
PDF: 14 pages
Proc. SPIE 8069, Integrated Photonics: Materials, Devices, and Applications, 806910 (31 May 2011); doi: 10.1117/12.886969
Show Author Affiliations
P. Pagliusi, Univ. of Calabria (Italy)
CNR-IPCF (Italy)
E. Lepera, Univ. of Calabria (Italy)
C. Provenzano, Univ. of Calabria (Italy)
CNR-IPCF (Italy)
E. Lepera, Univ. of Calabria (Italy)
C. Provenzano, Univ. of Calabria (Italy)
A. Mazzulla, CNR-IPCF (Italy)
G. Cipparrone, Univ. of Calabria (Italy)
CNR-IPCF (Italy)
G. Cipparrone, Univ. of Calabria (Italy)
CNR-IPCF (Italy)
Published in SPIE Proceedings Vol. 8069:
Integrated Photonics: Materials, Devices, and Applications
Ali Serpengüzel; Giancarlo Cesare Righini; Alfred Leipertz, Editor(s)
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