350 research outputs found
A novel directional coupler utilizing a left-handed material
A novel directional coupler with a left-handed material (LHM) layer between
two single-mode waveguides of usual material is introduced. The coupling system
is analyzed with the supermode theory. It is shown that such a LHM layer of
finite length can shorten significantly the coupling length for the two
single-mode waveguides. A LHM layer with two slowly tapered ends is used to
avoid the reflection loss at the ends.Comment: 3 pages, 2 figure
- …