A new terahertz phase modulator based on nanograting-on-oxide (NGO) technology has been developed by researchers at the University of Pennsylvania. The breakthrough could potentially lead to better terahertz imaging and communication systems. The new device can be used to precisely tune the phase of terahertz radiation, allowing for more efficient and accurate control of the terahertz waves. The NGO technology makes use of a nanostructure of alternating layers of metal and dielectric material, which is placed on top of an oxide layer. This structure can be tuned to control the phase of the terahertz waves, allowing for more precise manipulation of the terahertz radiation. The researchers believe that this technology could be used to improve the speed and accuracy of terahertz imaging and communication systems, as well as to create more efficient devices for terahertz sensing.

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source: Phys.org