Integrated optical microdisk-resonator,
2D simulations of configurations with the following specification: background refractive index nb = 1.0, refractive index of the guiding regions ng = 1.5, waveguide core width w = 0.4 µm, cavity radius R = 5.0 µm, gap g = 0.2 µm. All calculations are meant for TE polarization, i.e. Ey is the single nonvanishing component of the electrical field.
Power transmission and drop spectrum:
The resonator is excited in the lower left port by the guided mode of the lower core. PT and PD are the guided power fractions that are transmitted straight ahead, and dropped into the upper left port, respectively. The links at the positions indicated by the blue tick marks lead to illustrations of the time dependent electric field.
Caution: For the application of the QUEP programs, the structure has been represented as a sequence of 200 z-homogeneous slices, or as a stack of 204 x-homogeneous layers, that define a staircase approximation to the disk border. The spectral discretization includes 120 modal terms per layer and slice on a square interior computational window [-10, 10]x[-10, 10] µm2. Reflections, leading to partly standing waves inside the cavity (pronounced ripples in the plots of the field modulus), might thus well be pure numerical artifacts.