Terahertz wave generator and method of generating high-power terahertz waves using the same

A method of generating high-power terahertz waves using a terahertz wave generator in which an inside of a spherical body is hollow space, an inner surface of the spherical body is made of metal or coated with metal, and a focusing lens or an opening is formed in a predetermined portion of the spherical body, the method comprising:

• allowing light signals to be incident through the focusing lens or the opening;
• focusing or collimating the incident light signals in the hollow space of the spherical body;
• generating a first air plasma from the focused light signals;
• generating first terahertz waves when the first air plasma undergoes a reaction;
• collimating the light signals in the hollow space of the spherical body;
• reflecting the light signals from the inner surface of the spherical body;
• focusing the reflected light signals in the hollow space of the spherical body;
• generating a second air plasma from the focused light signals;
• and
• generating second terahertz waves when the second air plasma undergoes a reaction, and superposing the second terahertz waves on the first terahertz waves.