19 April 2000 GaN and ZnO epitaxial films and channel waveguides for integrated optoelectronics
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Proceedings Volume 3950, Optoelectronic Integrated Circuits IV; (2000) https://doi.org/10.1117/12.382155
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States
We have grown epitaxial GaN and ZnO films on sapphire and silicon substrates, and investigated the possibility of forming channel waveguides utilizing the effect of thin- film-induced index change. 2D confinement of light was clearly observed in the channel region of GaN defined by a SiN cladding layer of a stripe window pattern. The lateral confinement of light in the window region indicates that the effective guide index in the window region of GaN is higher than that in the SiN-loaded outer region. We carried out numerical analyses on the various possible effects that might contribute to the overcompensation of the negative loading effect of a SiN cladding window. This includes the photoelastic, piezoelectric, and electro-optic effects in GaN induced by a SiN window layer. The analysis result suggests that the observed phenomenon can be ascribed to a combination of both the photoelastic and electro-optic effects, and especially that the spontaneous polarization field in GaN might play an important role in forming a channel waveguide in the window region.
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Hong Koo Kim, Hong Koo Kim, Euisong Kim, Euisong Kim, Ahmed Nahhas, Ahmed Nahhas, Boon Kwee Lee, Boon Kwee Lee, } "GaN and ZnO epitaxial films and channel waveguides for integrated optoelectronics", Proc. SPIE 3950, Optoelectronic Integrated Circuits IV, (19 April 2000); doi: 10.1117/12.382155; https://doi.org/10.1117/12.382155

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