Non-square rectangular microresonators
2D simulation of two configurations with the following specification: background refractive index nb = 1.0, refractive index of the guiding regions ng = 3.2, waveguide width w = 0.2 µm, gap width g = 0.29 µm, the resonator dimensions are as given below. All calculations are meant for TE polarization, i.e. Ey is the single nonvanishing component of the electrical field.
Spectral response of the resonator elements
The devices are excited in port A by the guided mode of the lower waveguide with the specified vacuum wavelength λ. PB - PD and PA are the relative power transmissions to ports B, C, and D, and the relative power reflected into port A. Note that the curves related to PA, PC, and PD are almost superimposed. The links at the positions indicated by the the blue tick marks lead to illustrations of the time dependent electric field, and of the local electromagnetic energy density, respectively.
Cavity aspect ratio 2:1
Resonator dimensions L = 3.08 µm, W = 1.54 µm, the waveguides run along the long sides of the cavity.
Cavity aspect ratio 1:2
Resonator dimensions L = 1.54 µm, W = 3.08 µm, the waveguides run along the shorter sides of the cavity.