ZPol, radial polarizer, z polarization

Lower Cost ZPol

Radial Polarizer (Not a circular polarizer) and
"Z" Polarizer - Polarization in the direction of propagation

Features

Radial polarizer
Polarizes light in the direction of propagation
with focusing optics
Obtain 3D orientation of molecules and crystals
Works for many types of lasers

Produced by Nanophoton Corp: www.nanophoton.jp

Polarization in the direction of light propagation has been know for some time. Trying to build a device to achieve it has been a problem. ZPOL is a new device to generate radial polarization, which when combined with a high numerical lens, generates polarization in the Z direction.

How is this done? First linearly polarized light is incident on the ZPOL. Our Lepton IV Series diode lasers would work quite fine for this. The ZPOL turns the linear polarized light to radial polarized light. Next a high NA lens is used. As the light is being focused the X and Y components cancel out at the focus leaving only the z component, or Z polarization.

New applications for this device are just starting to appear. Let us know how you might use this unique polarizer.

Specifications

Mount size:	25mm x 5mm thickness
Clear aperture:	10mm
Pattern:	4 sections
Group delay dispersion:	~100-200 fs^2
Retardation error:	0.5+/-0.05 lambda
Optical axis error:	+/- 2 deg.
Coating:	AR coated at center wavelength Transmission >98%
Wavelength:	Specify at time of order

Ordering Information

Model #	Description
ZPol-532-QzM-4	for 532nm lasers
ZPol-633-QzM-4	for 632.8nm HeNe
ZPol-785-QzM-4	for 785nm lasers

Please call for all other wavelengths, high power lasers and pulsed lasers.

Example
Raman scattering from carbon nanotubes was measured with x- and z- polarization. The radial breathing mode of the nanotube is specifically detected by the z- polarization.

Last updated: May 2010