摘要
Polarization independent bends and beam splitters for transverse electric （TE） and transverse magnetic （TM） polarizations have been demonstrated in two-dimensional （2D） photonic crystals （PhCs）. In virtuel of equi-frequency contour analysis and finite-difference time-domain calculations, self-collimation behaviors for TE- and TM-polarizations are achieved at the same frequency. Simulation results show a 90-degree bend with 90% efficiency and beam splitters with about 96% total efficiency for both TE- and TM- polarizations, where the light is self-guided by the self-collimation effect. Such bends and beam splitters are expected to play important roles in optical devices where polarization insensitivity is needed.
Polarization independent bends and beam splitters for transverse electric （TE） and transverse magnetic （TM） polarizations have been demonstrated in two-dimensional （2D） photonic crystals （PhCs）. In virtuel of equi-frequency contour analysis and finite-difference time-domain calculations, self-collimation behaviors for TE- and TM-polarizations are achieved at the same frequency. Simulation results show a 90-degree bend with 90% efficiency and beam splitters with about 96% total efficiency for both TE- and TM- polarizations, where the light is self-guided by the self-collimation effect. Such bends and beam splitters are expected to play important roles in optical devices where polarization insensitivity is needed.
基金
This work was supported by the National Natural Science Foundation of China (No.10674177)
the Science Foundation of China University of Mining & Technology (No.2006B025).
