Mapping the broadband polarization properties of linear 2D SOI photonic crystal waveguides.
Both quasi-TE and TM polarisation spectra for a silicon-on-insulator (SOI) waveguide are recorded over (1100-1700)nm using a broadband supercontinuum source. By studying both the input and output polarisation eigenstates we observe narrowband resonant cross coupling near the lowest quasi-TE mode cut-off. We also observe relatively broadband mixing between the two eigenstates to generate a complete photonic bandgap. By careful analysis of the output polarisation state we report on an inherent non-reciprocity between quasi TE and TM fundamental mode cross coupling. The nature of polarisation distinction in such bandgap structures is discussed in the context of polarisation scattering at an interface.
Canning
John
J
Skivesen
Nina
N
Kristensen
Martin
M
Frandsen
Lars H
LH
Lavrinenko
Andrei
A
Martelli
Cicero
C
Tetu
A
A