Visualization of mode transformation in a planar waveguide splitter by near-field optical phase imaging

Citation
Mlm. Balistreri et al., Visualization of mode transformation in a planar waveguide splitter by near-field optical phase imaging, APPL PHYS L, 79(7), 2001, pp. 910-912
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
0003-6951 → ACNP
Volume
79
Issue
7
Year of publication
2001
Pages
910 - 912
Database
ISI
SICI code
0003-6951(20010813)79:7<910:VOMTIA>2.0.ZU;2-Z
Abstract
The gradual transformation of a guided TM00 mode into an "intermediate" dou ble mode by a splitting junction has been investigated with a phase-sensiti ve photon scanning tunneling microscope. Field profiles and wave vectors of the modes have been directly determined from the phase information. Via a Fourier analysis of the measured phase and amplitude maps the decay of the TM00 mode and buildup of the intermediate mode have been directly visualize d. Phase singularities and phase jumps in the transition region underline t he mode transformation process. Finally, a partial polarization conversion of the TM modes to TE-polarized modes has been observed. (C) 2001 American Institute of Physics.