Abstract-Hollow complementary omega-ring-shaped metamaterial modulators with dual-band tunability

Hairun Chen, Bin Yang, Yan Gui, Jiaqi Niu,  Jingquan Liu,

https://www.osapublishing.org/ol/abstract.cfm?uri=ol-43-16-3913

In this Letter, we report two kinds of metamaterial modulators based on hollow complementary omega-ring-shaped (HCΩ) structures, which are fabricated on parylene-C thin film with high flexibility and can realize dual-band amplitude tunability. The first type of structure (HCΩ-I) consists of identical unit cells along a similar direction, achieving different tunability under different compression directions but suffering from polarization dependence. To investigate the effect of unit cell direction on polarization direction, the unit cells in the HCΩ-I device are rotated by 90° in sequence to form a symmetrical type of structure (HCΩ-II), which successfully produces reverse dual-band variation of transmission with good polarization independence. These two developed flexible modulators with varied tunable ability will have a promising application in terahertz detection, sensing, and imaging.

© 2018 Optical Society of America

Abstract-Flexible omega-ring metamaterial sensor with ultrahigh sensitivity in the terahertz region

Yan Gui, Hairun Chen, Bin Yang, Jingquan Liu, Xiang Chen, Xiaolin Wang, and Chunsheng Yang

https://www.osapublishing.org/ome/abstract.cfm?uri=ome-7-11-4123

This article presents a dual-band tunable metamaterial sensor in the terahertz region, which has a high sensitivity and can work on curved surface with good flexibility. The proposed metamaterial sensor is composed of omega-ring arrays with two types of omega-shape structures fabricated on parylene-C thin substrates. An omega-I structure is developed from unit omega cells arranged along the same direction. Meanwhile, in order to investigate the effect of the unit cell direction on THz transmission, each unit cell is rotated by 90° in sequence to configure omega-II structure. Compared to the omega-I structure, the omega-II structure achieves a 31.1% intensity change when only 4% length is changed and the strain change is around 1.3 × 10−4. Moreover, the omega-II structure is insensitive to the polarization angles of incident waves, which will be beneficial for the potential application of the new flexible THz sensing technology.

© 2017 Optical Society of America

Abstract-A 'T' shaped flexible multiband ultra-thin terahertz metamaterial with consistent curved transmission spectra

Hairun Chen1,2, Bin Yang1,2, Xiaoqing Zhao1,2, Yan Gui1,2, Jingquan Liu1,2, Xiang Chen1,2,
 Xiaolin Wang1,2and Chunsheng Yang1,2


http://iopscience.iop.org/article/10.1088/2053-1591/aa7434


In this paper, we designed a flexible multiband ultra-thin terahertz metamaterial with four 'T' shaped beams deposited on parylene-C substrate to achieve sensing. The simulated and experimental investigations of transmission spectra showed two resonant peaks, respectively, which demonstrated a good numerical and experimental agreement. Due to this special 'T' shaped structure, the transmission spectra were nearly unchanged in the first resonant peak and slightly fluctuant in the second resonant peak after bending with a constant step, which successfully confirmed a pretty consistent curved transmission performance. A further study about the effect of polarization and incident angle direction of terahertz wave on transmission spectra indicated that the transmission of the sample did not vary with the change of polarization angles but would be influenced by incident angles. In order to explore the performance of the structure in terms of sensing phenomenon, a final contrast simulation on different surface analytes and without analyte was carried out, consequently suggesting a promising and remarkable function in sensing applications especially in detecting biomolecules.