Reconfigurable optical rectangular particle array absorber based on metal–DNA–metal​ structure as a refractive index sensor and optical switch

WITHDRAWN: Microfluidic as liquid lens for THz reconfigurable antenna and gain enhancement with sensing application

“…In addition, the THz antenna technology has been developed for various goals such as cancer detection [17] and antenna with different forms have been developed of patch antenna with photonic crystal [18], dipole antenna [19], slot antenna [20], and Yagi antenna [21][22]. However, to detect material under test for the THz spectrum using metasurface [23] and absorbers [24] are more interesting than antenna. Furthermore, the microfluidic technology has been used for transferring material [25] which can be noticed for sensing and material detection [26][27] and also it can be used for making a lens because of the higher refractive index of liquids such as water.…”

Recent advances in the metamaterial and metasurface-based biosensor in the gigahertz, terahertz, and optical frequency domains

“…For designing an optical sensor with switching behavior, DNA composite is being studied. The FOM of 735 RIU−1 was recorded, surpassing the FOM of conventional absorbers for the purpose of refractive index sensing [ 180 ].…”

THz absorber for breast cancer early detection based on graphene as multi-layer structure

“…The sensitivity and FOM of the sensor can be used for determining the healthy and cancer cell when the tissues are placed in front of them. The sensitivity can be obtained by Eq.6 where the Δf is the frequency shift and the variation of the refractive index is indicated by Δn [30][31].…”

“…And the FOM can be calculated by Eq. (7), where the S is the sensitivity of the sensor and FWHM (Full width at half maximum) is the 3dB bandwidth of the reflection [30][31]. In Fig.…”