Terahertz sensing of 7 nm dielectric film with bound states in the continuum metasurfaces

YK Srivastava, RT Ako, M Gupta, M Bhaskaran… - Applied Physics …, 2019 - pubs.aip.org
The fingerprint spectral response of several materials with terahertz electromagnetic
radiation indicates that terahertz technology is an effective tool for sensing applications …

Dual-surface flexible THz Fano metasensor

YK Srivastava, L Cong, R Singh - Applied Physics Letters, 2017 - pubs.aip.org
Sensing technologies based on terahertz waves have immense potential due to their non-
destructive, transparent, and fingerprint spectral response of several materials that are …

Terahertz biosensing based on bi-layer metamaterial absorbers toward ultra-high sensitivity and simple fabrication

H Zhou, C Yang, D Hu, D Li, X Hui, F Zhang… - Applied Physics …, 2019 - pubs.aip.org
Metamaterial absorbers have proven their ability to sense in the terahertz domain. However,
the sensitivity is always limited by the poor spatial overlap between the analyte and the …

Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces

R Singh, W Cao, I Al-Naib, L Cong… - Applied Physics …, 2014 - pubs.aip.org
High quality factor resonances are extremely promising for designing ultra-sensitive
refractive index label-free sensors, since it allows intense interaction between …

Sub-diffraction thin-film sensing with planar terahertz metamaterials

W Withayachumnankul, H Lin, K Serita, CM Shah… - Optics express, 2012 - opg.optica.org
Planar metamaterials consisting of subwavelength resonators have been recently proposed
for thin dielectric film sensing in the terahertz frequency range. Although the thickness of the …

[HTML][HTML] Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces

L Cong, S Tan, R Yahiaoui, F Yan, W Zhang… - Applied Physics …, 2015 - pubs.aip.org
Planar metasurfaces and plasmonic resonators have shown great promise for sensing
applications across the electromagnetic domain ranging from the microwaves to the optical …

Thin-film sensing with planar terahertz metamaterials: sensitivity and limitations

JF O'Hara, R Singh, I Brener, E Smirnova, J Han… - Optics …, 2008 - opg.optica.org
The limiting effects of varying the thickness of a dielectric overlayer on planar double split-
ring resonator (SRR) arrays are studied by terahertz time-domain spectroscopy. Uniform …

Toroidal dipole bound states in the continuum metasurfaces for terahertz nanofilm sensing

X Chen, W Fan, H Yan - Optics Express, 2020 - opg.optica.org
A novel terahertz nanofilm sensor consisting of toroidal dipole bound states in the continuum
(TD-BIC) inspired Fano resonance metasurface is proposed and investigated, which exhibits …

Ultrasensitive terahertz sensing with high-Q toroidal dipole resonance governed by bound states in the continuum in all-dielectric metasurface

Y Wang, Z Han, Y Du, J Qin - Nanophotonics, 2021 - degruyter.com
Toroidal dipole (TD) with weak coupling to the electromagnetic fields offers tremendous
potential for advanced design of photonic devices. However, the excitation of high quality …

Increasing the sensitivity of terahertz split ring resonator metamaterials for dielectric sensing by localized substrate etching

K Meng, SJ Park, AD Burnett, T Gill, CD Wood… - Optics express, 2019 - opg.optica.org
We demonstrate a significant enhancement in the sensitivity of split ring resonator terahertz
metamaterial dielectric sensors by the introduction of etched trenches into their inductive …