Abstract

An optical device based on a photonic bandgap heterostructure is designed, fabricated, and characterized. The sample contains two sets of $\mathrm{Si}/{\mathrm{SiO}}_2$ photonic crystals with different periods. When the device is working in air, it reflects omnidirectionally both TE and TM mode lights at the wavelength near $1.3 \mathit{\mu }\mathrm{m}$. The reflectivity measured in the bandgap is higher than 98% in an incident angle range $0^{°}–{70}^{°}$. When the device is surrounded with silica $\left(n>1.33\right)$, it permits the total transmission for the TM mode but prevents the TE mode from propagating, thus behaving as a polarization splitter. The experimental extinction ratio of the reflected TE/TM is $\sim 31 \mathrm{dB}$. The uniformity of the device performance over a large sample area is demonstrated.

© 2003 Optical Society of America

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