Abstract

In previous work [1, 2], we have successfully developed techniques to fabricate low-loss rib waveguides in a crystalline organic compound, namely, 3,4,9,10 perylenetetracarboxylic dianhydride (PTCDA). Here, we demonstrate apparently the first optical directional coupler using an index-matching layer in similar crystalline organic semiconductor waveguides. We also observed switching of the guided light between the waveguides in the PTCDA couplers by pumping the surface of one waveguide in the coupling region with 0.514 μm wavelength light.

© 1992 Optical Society of America