Photonics Research Group Home
Ghent University Journals/Proceedings
About People Research Publications Education Services


Publication detail

Authors: H. Gersen, T.J. Karle, R.J.P. Engelen, W. Bogaerts, J.P. Korterik, N.F. van Hulst, T.F. Krauss, L. Kuipers
Title: Direct observation of Bloch harmonics and negative phase velocity in photonic crystal waveguides
Format: International Journal
Publication date: 4/2005
Journal/Conference/Book: Physics Review Letters
Volume(Issue): 94(12) p.123901
DOI: 10.1103/physrevlett.94.123901
Citations: 83 ( - last update: 21/7/2024)
55 (OpenCitations - last update: 3/5/2024)
Look up on Google Scholar
Download: Download this Publication (454KB) (454KB)


The eigen eld distribution and band-structure of a photonic crystal waveguide have been measured
with a phase-sensitive near- eld scanning optical microscope. Bloch modes, which consist of
more than one spatial frequency, are visualized in the waveguide. In the band-structure multiple
Brillouin zones due to zone folding are observed in which positive and negative dispersion is seen.
The negative slopes are shown to correspond to a negative phase velocity but positive group velocity.
The lateral mode pro le for modes separated by one reciprocal lattice vector is found to be
di erent.

Related Research Topics

Related Projects

Citations (OpenCitations)

Back to publication list