Fig. 1. Rectangular waveguide with dielectric discontinuities (a) and corresponding double-barrier curve (b)

Fig. 2. Relationship curves between tunneling probability and frequency for two different barrier widths

Fig. 3. Relationship curve between tunneling probability and frequency for evanescent and traveling waves

Fig. 4. Relationship curve between tunneling probability and refractive index in two barrier regions

Fig. 5. Relationship curve between tunneling probability and refractive index in non-barrier region

Fig. 6. Schematic diagram of pulse laser ranging

Fig. 7. Schematic diagram of phase laser ranging