Abstract
The waveguiding properties of a multilayer dielectric slab waveguide structure with applications in
edge-coupled terahertz photomixer sources are studied. The structure guides two interfering laser beams, which their
central frequency difference falls into the terahertz spectrum. The top layer of the dielectric waveguide structure
is made of an ultrafast photoabsorbing material, wherein the power of the guided modes are being absorbed and
converted into a terahertz signal. The optical field and power distributions inside the waveguide structure are
studied for different physical parameters of the dielectric layers. The absorbed optical intensity and the generated
terahertz photocurrent and terahertz power inside the photoabsorbing layer are calculated.
© 2007 IEEE
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