ZPol TM

ZPol produces polarization in the direction of light propagation ( z - polarization ),
providing sensitivity to crystal or molecular orientaion in 3D.
The Counting Frame is a fundamental tool in stereological research.

ZPol produces "z-polarization", the light polarize in the direction of its propagation. "Z-polarization" has even been forgotten because propagating light only contain transverse electromagnetic wave of x and y polarization. The new technology from nanophoton easily create the forgotten "z-polariztion". ZPol enables us to obtain 3D orientation of molecules and crystal, unlike conventionla polarizers and wave plates.

The figure below shows an example of ZPol applications. Raman scattering from carbon nanotubes was measured with x- and z-polarization. The radial breathing mode of the nanotubes is specifically detected by z-polarization.

Z polarization device ZPol
The Counting Frame is a fundamental tool in stereological research.

The radial breathing mode is detected effectively with z-polarization. ZPol provides a new detection technique sensitive to molecular orientation in 3D. Reference: Y. Saito et al., Chem. Phys. Lett. 410, 136 (2005).

Courtesy from Nanophotonics lab, RIKEN, Japan

>> How to use

Z-polarization is produced by a combination of a ZPol and a high-NA lens. First, liner polarization is incident to the ZPol and converted to radial polarization. Second, the focal spot given by the lens has strong z-polarized light through the interference of radial polarization at the geometrical focus. By rotating the ZPol, it is also possible to produce Azimuthal polarization which does not contain z-polarization at the focus.

>> Specification

Mount size : 25mm diameter
Clear aperture : 10 mm diameter
Wavelength : Specify one wavelength between visible and near infrared.
Usable with pulse lasers : ns, ps and fs.