Electric Fano resonance-based terahertz metasensors

Abstract

Sensing technologies based on terahertz (THz) waves have significant application prospects in fast imaging, free label, and non-invasive inspection methods. However, the main drawback limiting the performance of THz-based bio-chemical...

A pixelated frequency-agile metasurface for broadband terahertz molecular fingerprint sensing

“…It significantly impedes the widespread application of THz technology in practical biochemical molecular recognition. The proposed micro/nanophotonics can overcome the bottleneck by strongly enhancing the near-field of subwavelength resonators 3,4 to address some THz practical applications, 5,6 which promote unprecedented control of light at will. [7][8][9][10][11][12][13][14][15][16] If the resonance and absorption fingerprints luckily overlap in the spectrum, the enhanced nearfield will intensify the molecular-resonator coupling, [17][18][19][20] which greatly affects the linewidth and intensity of the resonance, so that the molecular fingerprints can be extracted from the change.…”

Topologically tuned terahertz confinement in a nonlinear photonic chip

“…The surge of interest and the development of reliable terahertz (THz) technology is driven by the high demand for applications in, e.g., wireless communications 1 , 2 , signal processing 3 – 5 , biosensing 6 , 7 and non-destructive evaluation 8 . However, the lack of integrated functional devices in the THz range, including THz emitters and detectors, has limited their applications.…”

Effect of THz spectra of L-Arginine molecules by the combination of water molecules

“…Terahertz (THz) technology is of great significance in organisms, biological macromolecules, nucleic acids, proteins, and sugars because it can provide the information that usually cannot be obtained directly through detection methods of optical, X-ray, and nuclear magnetic resonance ( Peng et al., 2020 ; Liu et al., 2019 ; Zhu et al., 2021 ). To date, the THz method has been successfully applied to molecular and cell biology ( Shi et al., 2020 ; Penkov and Fesenko, 2020 ; Nagai et al., 2005 ; Wang et al., 2021 ). However, most of these existing works focus on solid anhydrous substance, whereas aqueous solutions are rarely studied.…”