Investigation of Novel Quantum Well Structures for Non-Linear Optics.
Final rept. 1 Sep 93-31 Aug 96,
STANFORD UNIV CA STANFORD ELECTRONICS LABS
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This is the final report for AASERT increment N00014-93-I-1061 to contract N00014-92-J-1903. Initially, Herman Chui was supported and upon completion of his Ph.D., Chris Ebert, was added to the CNOM project to develop a mid-infrared light source using form birefringent waveguides. A compact, integrated mid-infrared light source 3-5 micrometers would have several applications, including airborne countermeasures and spectroscopy. The efforts here are aimed at creating nonlinear waveguides that can, through the process of Difference Frequency Generation DFG, mix two near-infrared laser diodes and generate a long wavelength output. One of the most interesting properties of artificially structured materials is that they can exhibit properties that are absent in the bulk materials of which they are composed. Such an example is the birefringence exhibited in multilayer stacks of materials, where the component materials are isotropic. This effect is known as form birefringence. Thus, waves traversing the medium with their electric fields perpendicular to the plane TM experience a different index of refraction than TE waves those with electric field parallel to the plane. This difference is due to the different boundary conditions imposed on electric fields parallel and perpendicular to dielectric interfaces.