Mobile charge induced periodic poling and device
a mobile charge and periodic poling technology, applied in the field of high-quality short-period bulk domain inversion structures (gratings), can solve the problems of difficult long-period growth lengths, domain inversion, and domain limit the lateral dimension and efficiency
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[0040]In one embodiment of the present invention, an improved domain inversion structure is provided that has optimized efficiency, reliable fabrication and ease of characterization. This improved domain inversion structure is the result of a new high voltage electric field poling based fabrication process which involves the generation of mobile charges within the substrate that is to be poled, accompanied by the application of a patterned high voltage electric field. This combination results in a patterned current flow through the substrate and creates a patterned domain inversion structure within the substrate. Various combinations of charge generation and voltage application can be used to tailor the size and shape of the domain inverted regions.
[0041]In one embodiment, a frequency conversion device is provided. The improved domain inversion structure resulting from the new fabrication process is shown schematically in FIG. 2. The inverted domains 202 are tapered in size from one...
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