Measuring amplitude and phase distribution of fields generated by gratings with sub-wavelength resolution

In this paper, we intend to gain an understanding of the interaction of light with microstructures. Measurements of amplitude and phase in the diffracted field close to gratings using a heterodyne scanning probe are presented. Coherent light diffracted by microstructures produces periodic features a...

Full description

Saved in:
Bibliographic Details
Published in:Optics communications 2002-05, Vol.205 (4), p.229-238
Main Authors: Nesci, A., Dändliker, R., Salt, M., Herzig, H.P.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Gratings
Optical elements, devices, and systems
Optics
Physics
Wave optics
Wave propagation in random media
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we intend to gain an understanding of the interaction of light with microstructures. Measurements of amplitude and phase in the diffracted field close to gratings using a heterodyne scanning probe are presented. Coherent light diffracted by microstructures produces periodic features and can give birth to phase dislocations, also called phase singularities. Phase singularities are isolated points where the amplitude of the field is zero. We present measurements of such phase singularities with 10 nm spatial sampling and compare them with theoretical results obtained from rigorous diffraction calculations. The observed polarization effects reveal also important information about the vectorial field conversion by the fiber tip.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(02)01371-8