Abstract
Resonant filters in waveguides with vertical gratings have been realized on a silicon-on-insulator wafer. Two
identical uniformly distributed Bragg reflectors with vertical gratings are separated by a quarter wavelength phase
offset. Experimental studies show a broad stopband and a narrow transmission band which shifts with changing
substrate temperature that is also illuminated by an external laser pump beam at 514-nm wavelength. Experimental
results on a low-frequency thermal modulation using an external light source are also presented.
© 2007 IEEE
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