Jiaran Xiong

Nov 12, 2024 | opg.optica.org | Song Gao |Shijing Guo |Jiaran Xiong |Dong Wang

A multifunctional terahertz functional device based on vanadium dioxide (${{\rm VO}_2}$) and graphene is proposed, which can realize ultra-wideband absorption and polarization conversion. When the ${{\rm VO}_2}$ is in the insulating state, the device can achieve the polarization conversion function to convert the incident wave into the corresponding cross-polarized wave.

Jun 7, 2024 | opg.optica.org | Song Gao |Shijing Guo |Jiaran Xiong |Dong Wang

Metamaterials, as novel materials, have electromagnetic behaviors that can be realized by rationally designing the unit structure. It plays an important role in the research of terahertz functional devices. Switchable terahertz devices are constructed by flexibly combining the excellent properties of graphene and vanadium dioxide (${{\rm VO}_2}$) with the application potential of terahertz technology.

Feb 29, 2024 | opg.optica.org | Song Gao |Shijing Guo |Jiaran Xiong |Dong Wang

In this paper, a dual-band terahertz metamaterial sensor based on aluminum and silicon is proposed and simulated. The aluminum surface, which is deposited on a silicon substrate, is made of a C-shaped frame resonator, a rectangular beam, and a cross. The device is insensitive to the change of incident angle in the range of 0°–30°, which shows the great transmission stability of the sensor.