Transmission Characteristics and Fano-Like Lineshape in Coupled-Slotted Microresonators

The coupling mechanism of a system in which two identical microresonators with slot are coupled through a tapered fiber is theoretically investigated and its transmission rate is numerically calculated. Physical parameters are evaluated for their impacts on the transmission spectra. Fano-like lineshape is observed under certain condition (γ
_c
> 2κ) and optimization of dominant parameters (κ
₁
/κ
₀
, kL, γ
_c
/κ
₀
and Q
₀
) is applied to make the lineshape more steepened and sharper. This structure is promising for application in optical switch, sensing and research on Fano resonance.