Optical device including two-dimensional material and method of manufacturing the same

An optical device comprising:

• a barrier stack on a substrate, the barrier stack including at least two barrier layers;
• a first channel layer on the substrate, the first channel layer including,
• a bottom channel layer extending, from a first side of the barrier stack, at least partially between the barrier stack and the substrate,
• a top channel layer extending, from the first side of the barrier stack, at least partially on a top surface of the barrier stack, and
• a side channel layer extending along side surfaces of the at least two barrier layers on the first side of the barrier stack, the side channel layer connecting the top channel layer and the bottom channel layer;
• a second channel layer on the substrate, the second channel layer including,
• a horizontal channel unit extending, from a second side of the barrier stack, at least partially between the at least two barrier layers, and
• a side channel unit extending along a side surface of at least a lower barrier layer of the at least two barrier layers on the second side of the barrier stack, the side channel unit connected to the horizontal channel unit;
• a drain electrode connected to the first channel layer, such that the drain electrode is connected to the bottom channel layer and the top channel layer via the side channel layer;
• and
• a source electrode connected to the second channel layer, such that the source electrode is connected to the horizontal channel unit via the side channel unit.