Method for synthesizing organic matter and submerged plasma device

A submerged plasma device for causing dielectric barrier discharge, comprising:

• a first electrode;
• a solid dielectric layer in contact with the first electrode;
• a discharge chamber having an inner space accommodating the first electrode and the solid dielectric layer;
• a second electrode arranged so as to oppose the first electrode with the solid dielectric layer therebetween and so as to separate the inner space of the discharge chamber from a liquid, the second electrode having a gas phase surface located on a side of the inner space and a liquid phase surface located on a side of the liquid, and the second electrode having a plurality of through holes connecting together the gas phase surface and the liquid phase surface;
• and
• a gas introducing device for supplying a gas into the inner space of the discharge chamber so as to form an interface between the gas and the liquid inside each of the through holes of the second electrode.