Submillimeter refers to electromagnetic waves with wavelengths ranging from 1 millimeter to 0.1 millimeters. This range falls between the microwave and infrared regions of the electromagnetic spectrum. Submillimeter waves are used in various applications, including astronomy, where they help study celestial objects and phenomena, such as the formation of stars and galaxies. In technology, submillimeter waves are utilized in imaging systems and communication devices. For instance, submillimeter telescopes are designed to observe cosmic events, while terahertz technology leverages these waves for high-speed data transmission. Their unique properties make them valuable in both scientific research and practical applications.