Leaky Modes of Waveguides as a Classical Optics Analogy of Quantum Resonances

Figure 1

Propagation of resonances inside a slab waveguide of width and constant refractive index . The slab supports leaky modes () defined by (29). The figure shows the propagation in the axial direction (from the bottom to the top in each slab) of the real part of the leaky modes field amplitudes for (left), (center), and (right). Note that these are attenuated as the mode propagates. The leakage is faster for larger values of .