  By breaking the symmetrical arrangement of double micro-ring resonator, the
formation mechanism and performance of reflection and transmission spectrum and
optical field distribution are investigated. The reflection spectrum is Fano
shape. The Fano resonance has an asymmetric and sharp resonance peak can be
independently tuned by changing the asymmetric coupling factor of the first
micro-ring. The transmission spectrum is electromagnetically induced
transparency(EIT)-like shape. The (EIT)-like resonance can be independently
tuned by changing the absorption factor and the phase shift factor of the
second micro-ring. The Fano and EIT-like resonance have low loss and high
near-field localization characteristics, our research has promising
applications in optical communication and opto-electronic modulators.
