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Silicon photonic wire Bragg grating for on-chip wavelength (de)multiplexing employing ring resonators

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We optimized silicon photonic wire Bragg gratings covered with SU-8 for quasi-TM polarized light at a center wavelength of 1550 nm with respect to high reflectivity and large wavelength range by means of 3D FDTD simulations. The simulations resulted in a grating design providing a reflectivity of >70% over a wavelength range of 50 nm. Corresponding samples were fabricated employing e-beam lithography and reactive ion etching. The measured reflection spectrum demonstrates the good performance of the optimized Bragg grating reflector. First experimental results of a silicon photonic device combining the Bragg reflector with ring resonators for on-chip wavelength (de)multiplexing in refractometric sensor arrays are presented.

© 2011 Optical Society of America

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