Photo-Excited Silicon-Based Spatial Terahertz Modulators

The increasing development of terahertz (THz) technology has led to various potential applications in THz imaging, spectroscopy and communications. These devices capable actively manipulating the amplitude, phase frequency waves are thus gaining numerous interests. All-optical silicon-based spatial modulators (STMs), as a simple, cost-effective, reconfigurable technique, standing focus research. Beginning with fundamental concept radiation, this paper systematically summarized modulation mechanism theoretical model for kind STM, reviewed recent advancements functional implemented by optical method yet, discussed performance-improved measures an emphasis on reflection reduction. Despite that, there been considerable progress realizing high-performance STMs, novel design is urgent realize higher rate more functionality.